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FFmpeg - Apply blur over face
FFmpeg - blur image according to blur mapApply depth of field blur effect from a grayscale video using ffmpegFFMPEG filter to boxblur and greyscale a video using alpha maskAlphamerge filter only works on first frameVideo for HTML5 — ffmpeg commandsFFMPEG dropping frames while encoding JPEG sequence at color changeUsing ffmpeg to make a movie from png filesHow can I scale an overlay within an ffmpeg filtercomplex?FFmpeg Sequentially Apply FiltersFFmpeg/AVconc - Capture Seamless VideoH.264 multi-pass encoding with FFmpegCan I get the final output video dimensions before encoding with ffmpeg?FFmpeg filter for scene changeHow to split video files upon detected change in resolution? (ie. recorded streams containing multiple widths)
I'm trying to blur a portion of a video using FFmpeg (specifically to blur a face).
I have been trying to use a combination of timeline editing and the various bluring filters, but I cannot find a way to blur only a section of the video.
I'm hoping for something like:
-vf boxblur=enable='between(t,10,100)':width=20:height=20:x=400:y=200
Where width/height is size of blurred box and x/y are location of blurred box.
Is something like this possible?
video ffmpeg
edited Apr 15 '15 at 2:15
llogan
25.8k54782
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
add a comment |
I'm trying to blur a portion of a video using FFmpeg (specifically to blur a face).
I have been trying to use a combination of timeline editing and the various bluring filters, but I cannot find a way to blur only a section of the video.
I'm hoping for something like:
-vf boxblur=enable='between(t,10,100)':width=20:height=20:x=400:y=200
Where width/height is size of blurred box and x/y are location of blurred box.
Is something like this possible?
video ffmpeg
edited Apr 15 '15 at 2:15
llogan
25.8k54782
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
add a comment |
I'm trying to blur a portion of a video using FFmpeg (specifically to blur a face).
I have been trying to use a combination of timeline editing and the various bluring filters, but I cannot find a way to blur only a section of the video.
I'm hoping for something like:
-vf boxblur=enable='between(t,10,100)':width=20:height=20:x=400:y=200
Where width/height is size of blurred box and x/y are location of blurred box.
Is something like this possible?
video ffmpeg
edited Apr 15 '15 at 2:15
llogan
25.8k54782
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
I'm trying to blur a portion of a video using FFmpeg (specifically to blur a face).
I have been trying to use a combination of timeline editing and the various bluring filters, but I cannot find a way to blur only a section of the video.
I'm hoping for something like:
-vf boxblur=enable='between(t,10,100)':width=20:height=20:x=400:y=200
Where width/height is size of blurred box and x/y are location of blurred box.
Is something like this possible?
video ffmpeg
video ffmpeg
edited Apr 15 '15 at 2:15
llogan
25.8k54782
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
edited Apr 15 '15 at 2:15
llogan
25.8k54782
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
edited Apr 15 '15 at 2:15
llogan
25.8k54782
edited Apr 15 '15 at 2:15
llogan
25.8k54782
edited Apr 15 '15 at 2:15
llogan
25.8k54782
25.8k54782
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
asked Apr 13 '15 at 16:44
occvtechoccvtech
6451613
6451613
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
It is possible to apply temporal and spatial blurring to a segment/section – assuming the area you want to blur is a static location.
Original black lab pup image.
Using a mask image
Grayscale PNG mask image and resulting blurred image.
You can make a grayscale mask image to indicate the area to blur. For ease of use it should be the same size as the image or video you want to blur.
Example using alphamerge, boxblur, and overlay:
ffmpeg -i video.mp4 -i mask.png -filter_complex "[0:v][1:v]alphamerge,boxblur=10[alf];[0:v][alf]overlay[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart maskedblur.mp4
The white area is where the blur will occur, but this can easily be reversed with the negate filter for instance:
[1:v]negate[mask];[0:v][mask]alphamerge,boxblur=10[alf]...You could use the geq filter to generate a mask such as a gradient.
Blur specific area (without a mask)
ffmpeg -i derpdog.mp4 -filter_complex
"[0:v]crop=200:200:60:30,boxblur=10[fg];
[0:v][fg]overlay=60:30[v]"
-map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart derpdogblur.mp4
Note: The x and y offset numbers in overlay (60 and 30 in this example) must match the crop offsets.
What this example does:
- Crop the copy to be the size of the area to be blurred. In this example: a 200x200 pixel box that is 60 pixels to the right (
xaxis) and 30 pixels down (yaxis) from the top left corner. - Blur the cropped area.
- Overlay the blurred area using the same
xandyparameters from the crop filter.
Multiple blurs over specific areas (without a mask)
Blurred areas in top left, near center, and bottom.
"[0:v]crop=50:50:20:10,boxblur=10[b0];
[0:v]crop=iw:30:(iw-ow)/2:ih-oh,boxblur=10[b1];
[0:v]crop=100:100:120:80,boxblur=10[b2];
[0:v][b0]overlay=20:10[ovr0];
[ovr0][b1]overlay=(W-w)/2:H-h[ovr1];
[ovr1][b2]overlay=120:80"
Specific area not blurred (without a mask)
"[0:v]boxblur=10[bg];[0:v]crop=200:200:60:30[fg];[bg][fg]overlay=60:30"
Additional stuff
The audio is being stream copied (re-muxed). No re-encoding, so it is fast and preserves the quality.
The blurred area will have a hard edge.
The blurred area can be moved around if you're good with arithmetic expressions, or see the sendcmd or zmq filters.
If you want to blur for a certain duration use the
enableoption on the boxblur or the overlay.See the FFmpeg Filters Documentation for other blurring filters (sab, smartblur, unsharp).
Some related questions: How to blur a short scene in a video and How to add pixellate effect.
edited May 23 '17 at 12:41
Community♦
1
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
1
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this errorUnrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found
– Jim
May 3 '17 at 18:10
1
@Jim I noticed that my example command was missing a quote. You command should look something like this:ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4
– llogan
May 3 '17 at 19:51
|
show 7 more comments
For the case when one dislikes the sharp edge of the blurring, I made a script that layers different stages of blurring so that the edge is not sharp and it looks like this:
Instead of this:
It is a python script:
#!/usr/bin/env python3
import os,stat
def blur_softly(matrix,video_in="video_to_be_blurred.mp4",video_out=""):
if video_out == "":
video_out = video_in[:-4] + "_blurred" + video_in[-4:]
s0 = "ffmpeg -i " + video_in + " -filter_complex \n"[0:v]null[v_int0]; \n"
s1 = ''
a = 0
for m in matrix:
blur = m[6]
multiple = m[7]
width = m[0]+blur*multiple*2
height = m[1]+blur*multiple*2
x_cord = m[2]-blur*multiple
y_cord = m[3]-blur*multiple
timein = m[4]
timeout = m[5]
step = m[8]
margin = m[9]
for i in range(blur):
ii = multiple*i
s0 = s0 + "[v_int0]crop="+str(width-2*ii+(margin//2)*2)+":"+str(height-2*ii+(margin//2)*2)+":"+str(x_cord+ii-margin//2)+":"+str(y_cord+ii-margin//2) +
",boxblur="+str((i+1)*step)+":enable='between(t,"+str(timein)+","+str(timeout)+
")',crop="+str(width-2*ii)+ ":"+str(height-2*ii)+":"+str(margin//2)+":"+str(margin//2)+ "[blur_int" + str(i+1+a)+"]; \n"
s1 = s1 + "[v_int"+ str(i+a) +"][blur_int"+str(i+a+1)+"]overlay="+str(x_cord+ii)+":"+str(y_cord+ii)+":enable='between(t,"+str(timein)+","+str(timeout)+ ")'[v_int"+str(i+a+1)+"]; \n"
a += i+1
s = s0 + s1 + "[v_int"+str(a)+"]null[with_subtitles]" \n-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -preset slow -y "+video_out+"n"
print(s)
file_object = open('blur.sh', 'w')
file_object.write(s)
file_object.close()
st = os.stat('blur.sh')
os.chmod('blur.sh', st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
#w,h,x,y,timein,timeout,blur,multiple,step,margin
matrix = [[729,70,599,499,14.96,16.40,25,1,1,90],]
blur_softly(matrix,video_in="your_video.mp4",video_out="output_video.mp4")
You can change the parameters in the last and penultimate lines, the last two parametres between quatation marks are path to your video and output video (assuming they are placed in the working directory). In the penultimate line:
- the first two numbers indicate the size of the initial area to which maximum blur will be applied,
- the second two indicate the x and y coordinates thereof,
- the third two indicate the times in seconds when the blurring should be applied,
- "25" in this example indicates that there will be 25 boxes applied on top of each other)
- the next "1" indicates that bigger boxes with less blurr should be just one pixel wider than their predecessors
- the second "1" indicates that blurring should increase by one until until maximum of 25 (from above)
- "30" indicates the margin that is taken into consideration for applying the blur, so increasing this makes the blur respect more of its surrounding. Increasing this value also solves error texted like
Invalid chroma radius value 21, must be >= 0 and <= 20
By running it, one should get an output like the following (it gets written to a filethat can be run and printed on the output that can be copypasted and run):
ffmpeg -i video_to_be_blurred.mp4 -filter_complex
"[0:v]null[v_int0];
[v_int0]crop=869:210:529:429,boxblur=1:enable='between(t,14.96,16.4)',crop=779:120:45:45[blur_int1];
[v_int0]crop=867:208:530:430,boxblur=2:enable='between(t,14.96,16.4)',crop=777:118:45:45[blur_int2];
[v_int0]crop=865:206:531:431,boxblur=3:enable='between(t,14.96,16.4)',crop=775:116:45:45[blur_int3];
[v_int0]crop=863:204:532:432,boxblur=4:enable='between(t,14.96,16.4)',crop=773:114:45:45[blur_int4];
[v_int0]crop=861:202:533:433,boxblur=5:enable='between(t,14.96,16.4)',crop=771:112:45:45[blur_int5];
[v_int0]crop=859:200:534:434,boxblur=6:enable='between(t,14.96,16.4)',crop=769:110:45:45[blur_int6];
[v_int0]crop=857:198:535:435,boxblur=7:enable='between(t,14.96,16.4)',crop=767:108:45:45[blur_int7];
[v_int0]crop=855:196:536:436,boxblur=8:enable='between(t,14.96,16.4)',crop=765:106:45:45[blur_int8];
[v_int0]crop=853:194:537:437,boxblur=9:enable='between(t,14.96,16.4)',crop=763:104:45:45[blur_int9];
[v_int0]crop=851:192:538:438,boxblur=10:enable='between(t,14.96,16.4)',crop=761:102:45:45[blur_int10];
[v_int0]crop=849:190:539:439,boxblur=11:enable='between(t,14.96,16.4)',crop=759:100:45:45[blur_int11];
[v_int0]crop=847:188:540:440,boxblur=12:enable='between(t,14.96,16.4)',crop=757:98:45:45[blur_int12];
[v_int0]crop=845:186:541:441,boxblur=13:enable='between(t,14.96,16.4)',crop=755:96:45:45[blur_int13];
[v_int0]crop=843:184:542:442,boxblur=14:enable='between(t,14.96,16.4)',crop=753:94:45:45[blur_int14];
[v_int0]crop=841:182:543:443,boxblur=15:enable='between(t,14.96,16.4)',crop=751:92:45:45[blur_int15];
[v_int0]crop=839:180:544:444,boxblur=16:enable='between(t,14.96,16.4)',crop=749:90:45:45[blur_int16];
[v_int0]crop=837:178:545:445,boxblur=17:enable='between(t,14.96,16.4)',crop=747:88:45:45[blur_int17];
[v_int0]crop=835:176:546:446,boxblur=18:enable='between(t,14.96,16.4)',crop=745:86:45:45[blur_int18];
[v_int0]crop=833:174:547:447,boxblur=19:enable='between(t,14.96,16.4)',crop=743:84:45:45[blur_int19];
[v_int0]crop=831:172:548:448,boxblur=20:enable='between(t,14.96,16.4)',crop=741:82:45:45[blur_int20];
[v_int0]crop=829:170:549:449,boxblur=21:enable='between(t,14.96,16.4)',crop=739:80:45:45[blur_int21];
[v_int0]crop=827:168:550:450,boxblur=22:enable='between(t,14.96,16.4)',crop=737:78:45:45[blur_int22];
[v_int0]crop=825:166:551:451,boxblur=23:enable='between(t,14.96,16.4)',crop=735:76:45:45[blur_int23];
[v_int0]crop=823:164:552:452,boxblur=24:enable='between(t,14.96,16.4)',crop=733:74:45:45[blur_int24];
[v_int0]crop=821:162:553:453,boxblur=25:enable='between(t,14.96,16.4)',crop=731:72:45:45[blur_int25];
[v_int0][blur_int1]overlay=574:474:enable='between(t,14.96,16.4)'[v_int1];
[v_int1][blur_int2]overlay=575:475:enable='between(t,14.96,16.4)'[v_int2];
[v_int2][blur_int3]overlay=576:476:enable='between(t,14.96,16.4)'[v_int3];
[v_int3][blur_int4]overlay=577:477:enable='between(t,14.96,16.4)'[v_int4];
[v_int4][blur_int5]overlay=578:478:enable='between(t,14.96,16.4)'[v_int5];
[v_int5][blur_int6]overlay=579:479:enable='between(t,14.96,16.4)'[v_int6];
[v_int6][blur_int7]overlay=580:480:enable='between(t,14.96,16.4)'[v_int7];
[v_int7][blur_int8]overlay=581:481:enable='between(t,14.96,16.4)'[v_int8];
[v_int8][blur_int9]overlay=582:482:enable='between(t,14.96,16.4)'[v_int9];
[v_int9][blur_int10]overlay=583:483:enable='between(t,14.96,16.4)'[v_int10];
[v_int10][blur_int11]overlay=584:484:enable='between(t,14.96,16.4)'[v_int11];
[v_int11][blur_int12]overlay=585:485:enable='between(t,14.96,16.4)'[v_int12];
[v_int12][blur_int13]overlay=586:486:enable='between(t,14.96,16.4)'[v_int13];
[v_int13][blur_int14]overlay=587:487:enable='between(t,14.96,16.4)'[v_int14];
[v_int14][blur_int15]overlay=588:488:enable='between(t,14.96,16.4)'[v_int15];
[v_int15][blur_int16]overlay=589:489:enable='between(t,14.96,16.4)'[v_int16];
[v_int16][blur_int17]overlay=590:490:enable='between(t,14.96,16.4)'[v_int17];
[v_int17][blur_int18]overlay=591:491:enable='between(t,14.96,16.4)'[v_int18];
[v_int18][blur_int19]overlay=592:492:enable='between(t,14.96,16.4)'[v_int19];
[v_int19][blur_int20]overlay=593:493:enable='between(t,14.96,16.4)'[v_int20];
[v_int20][blur_int21]overlay=594:494:enable='between(t,14.96,16.4)'[v_int21];
[v_int21][blur_int22]overlay=595:495:enable='between(t,14.96,16.4)'[v_int22];
[v_int22][blur_int23]overlay=596:496:enable='between(t,14.96,16.4)'[v_int23];
[v_int23][blur_int24]overlay=597:497:enable='between(t,14.96,16.4)'[v_int24];
[v_int24][blur_int25]overlay=598:498:enable='between(t,14.96,16.4)'[v_int25];
[v_int25]null[with_subtitles]"
-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -slow preset -y video_to_be_blurred_blurred.mp4
answered Feb 22 at 9:45
supsup
3171515
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
add a comment |
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2 Answers
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It is possible to apply temporal and spatial blurring to a segment/section – assuming the area you want to blur is a static location.
Original black lab pup image.
Using a mask image
Grayscale PNG mask image and resulting blurred image.
You can make a grayscale mask image to indicate the area to blur. For ease of use it should be the same size as the image or video you want to blur.
Example using alphamerge, boxblur, and overlay:
ffmpeg -i video.mp4 -i mask.png -filter_complex "[0:v][1:v]alphamerge,boxblur=10[alf];[0:v][alf]overlay[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart maskedblur.mp4
The white area is where the blur will occur, but this can easily be reversed with the negate filter for instance:
[1:v]negate[mask];[0:v][mask]alphamerge,boxblur=10[alf]...You could use the geq filter to generate a mask such as a gradient.
Blur specific area (without a mask)
ffmpeg -i derpdog.mp4 -filter_complex
"[0:v]crop=200:200:60:30,boxblur=10[fg];
[0:v][fg]overlay=60:30[v]"
-map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart derpdogblur.mp4
Note: The x and y offset numbers in overlay (60 and 30 in this example) must match the crop offsets.
What this example does:
- Crop the copy to be the size of the area to be blurred. In this example: a 200x200 pixel box that is 60 pixels to the right (
xaxis) and 30 pixels down (yaxis) from the top left corner. - Blur the cropped area.
- Overlay the blurred area using the same
xandyparameters from the crop filter.
Multiple blurs over specific areas (without a mask)
Blurred areas in top left, near center, and bottom.
"[0:v]crop=50:50:20:10,boxblur=10[b0];
[0:v]crop=iw:30:(iw-ow)/2:ih-oh,boxblur=10[b1];
[0:v]crop=100:100:120:80,boxblur=10[b2];
[0:v][b0]overlay=20:10[ovr0];
[ovr0][b1]overlay=(W-w)/2:H-h[ovr1];
[ovr1][b2]overlay=120:80"
Specific area not blurred (without a mask)
"[0:v]boxblur=10[bg];[0:v]crop=200:200:60:30[fg];[bg][fg]overlay=60:30"
Additional stuff
The audio is being stream copied (re-muxed). No re-encoding, so it is fast and preserves the quality.
The blurred area will have a hard edge.
The blurred area can be moved around if you're good with arithmetic expressions, or see the sendcmd or zmq filters.
If you want to blur for a certain duration use the
enableoption on the boxblur or the overlay.See the FFmpeg Filters Documentation for other blurring filters (sab, smartblur, unsharp).
Some related questions: How to blur a short scene in a video and How to add pixellate effect.
edited May 23 '17 at 12:41
Community♦
1
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
1
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this errorUnrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found
– Jim
May 3 '17 at 18:10
1
@Jim I noticed that my example command was missing a quote. You command should look something like this:ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4
– llogan
May 3 '17 at 19:51
|
show 7 more comments
It is possible to apply temporal and spatial blurring to a segment/section – assuming the area you want to blur is a static location.
Original black lab pup image.
Using a mask image
Grayscale PNG mask image and resulting blurred image.
You can make a grayscale mask image to indicate the area to blur. For ease of use it should be the same size as the image or video you want to blur.
Example using alphamerge, boxblur, and overlay:
ffmpeg -i video.mp4 -i mask.png -filter_complex "[0:v][1:v]alphamerge,boxblur=10[alf];[0:v][alf]overlay[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart maskedblur.mp4
The white area is where the blur will occur, but this can easily be reversed with the negate filter for instance:
[1:v]negate[mask];[0:v][mask]alphamerge,boxblur=10[alf]...You could use the geq filter to generate a mask such as a gradient.
Blur specific area (without a mask)
ffmpeg -i derpdog.mp4 -filter_complex
"[0:v]crop=200:200:60:30,boxblur=10[fg];
[0:v][fg]overlay=60:30[v]"
-map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart derpdogblur.mp4
Note: The x and y offset numbers in overlay (60 and 30 in this example) must match the crop offsets.
What this example does:
- Crop the copy to be the size of the area to be blurred. In this example: a 200x200 pixel box that is 60 pixels to the right (
xaxis) and 30 pixels down (yaxis) from the top left corner. - Blur the cropped area.
- Overlay the blurred area using the same
xandyparameters from the crop filter.
Multiple blurs over specific areas (without a mask)
Blurred areas in top left, near center, and bottom.
"[0:v]crop=50:50:20:10,boxblur=10[b0];
[0:v]crop=iw:30:(iw-ow)/2:ih-oh,boxblur=10[b1];
[0:v]crop=100:100:120:80,boxblur=10[b2];
[0:v][b0]overlay=20:10[ovr0];
[ovr0][b1]overlay=(W-w)/2:H-h[ovr1];
[ovr1][b2]overlay=120:80"
Specific area not blurred (without a mask)
"[0:v]boxblur=10[bg];[0:v]crop=200:200:60:30[fg];[bg][fg]overlay=60:30"
Additional stuff
The audio is being stream copied (re-muxed). No re-encoding, so it is fast and preserves the quality.
The blurred area will have a hard edge.
The blurred area can be moved around if you're good with arithmetic expressions, or see the sendcmd or zmq filters.
If you want to blur for a certain duration use the
enableoption on the boxblur or the overlay.See the FFmpeg Filters Documentation for other blurring filters (sab, smartblur, unsharp).
Some related questions: How to blur a short scene in a video and How to add pixellate effect.
edited May 23 '17 at 12:41
Community♦
1
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
1
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this errorUnrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found
– Jim
May 3 '17 at 18:10
1
@Jim I noticed that my example command was missing a quote. You command should look something like this:ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4
– llogan
May 3 '17 at 19:51
|
show 7 more comments
It is possible to apply temporal and spatial blurring to a segment/section – assuming the area you want to blur is a static location.
Original black lab pup image.
Using a mask image
Grayscale PNG mask image and resulting blurred image.
You can make a grayscale mask image to indicate the area to blur. For ease of use it should be the same size as the image or video you want to blur.
Example using alphamerge, boxblur, and overlay:
ffmpeg -i video.mp4 -i mask.png -filter_complex "[0:v][1:v]alphamerge,boxblur=10[alf];[0:v][alf]overlay[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart maskedblur.mp4
The white area is where the blur will occur, but this can easily be reversed with the negate filter for instance:
[1:v]negate[mask];[0:v][mask]alphamerge,boxblur=10[alf]...You could use the geq filter to generate a mask such as a gradient.
Blur specific area (without a mask)
ffmpeg -i derpdog.mp4 -filter_complex
"[0:v]crop=200:200:60:30,boxblur=10[fg];
[0:v][fg]overlay=60:30[v]"
-map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart derpdogblur.mp4
Note: The x and y offset numbers in overlay (60 and 30 in this example) must match the crop offsets.
What this example does:
- Crop the copy to be the size of the area to be blurred. In this example: a 200x200 pixel box that is 60 pixels to the right (
xaxis) and 30 pixels down (yaxis) from the top left corner. - Blur the cropped area.
- Overlay the blurred area using the same
xandyparameters from the crop filter.
Multiple blurs over specific areas (without a mask)
Blurred areas in top left, near center, and bottom.
"[0:v]crop=50:50:20:10,boxblur=10[b0];
[0:v]crop=iw:30:(iw-ow)/2:ih-oh,boxblur=10[b1];
[0:v]crop=100:100:120:80,boxblur=10[b2];
[0:v][b0]overlay=20:10[ovr0];
[ovr0][b1]overlay=(W-w)/2:H-h[ovr1];
[ovr1][b2]overlay=120:80"
Specific area not blurred (without a mask)
"[0:v]boxblur=10[bg];[0:v]crop=200:200:60:30[fg];[bg][fg]overlay=60:30"
Additional stuff
The audio is being stream copied (re-muxed). No re-encoding, so it is fast and preserves the quality.
The blurred area will have a hard edge.
The blurred area can be moved around if you're good with arithmetic expressions, or see the sendcmd or zmq filters.
If you want to blur for a certain duration use the
enableoption on the boxblur or the overlay.See the FFmpeg Filters Documentation for other blurring filters (sab, smartblur, unsharp).
Some related questions: How to blur a short scene in a video and How to add pixellate effect.
edited May 23 '17 at 12:41
Community♦
1
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
It is possible to apply temporal and spatial blurring to a segment/section – assuming the area you want to blur is a static location.
Original black lab pup image.
Using a mask image
Grayscale PNG mask image and resulting blurred image.
You can make a grayscale mask image to indicate the area to blur. For ease of use it should be the same size as the image or video you want to blur.
Example using alphamerge, boxblur, and overlay:
ffmpeg -i video.mp4 -i mask.png -filter_complex "[0:v][1:v]alphamerge,boxblur=10[alf];[0:v][alf]overlay[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart maskedblur.mp4
The white area is where the blur will occur, but this can easily be reversed with the negate filter for instance:
[1:v]negate[mask];[0:v][mask]alphamerge,boxblur=10[alf]...You could use the geq filter to generate a mask such as a gradient.
Blur specific area (without a mask)
ffmpeg -i derpdog.mp4 -filter_complex
"[0:v]crop=200:200:60:30,boxblur=10[fg];
[0:v][fg]overlay=60:30[v]"
-map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart derpdogblur.mp4
Note: The x and y offset numbers in overlay (60 and 30 in this example) must match the crop offsets.
What this example does:
- Crop the copy to be the size of the area to be blurred. In this example: a 200x200 pixel box that is 60 pixels to the right (
xaxis) and 30 pixels down (yaxis) from the top left corner. - Blur the cropped area.
- Overlay the blurred area using the same
xandyparameters from the crop filter.
Multiple blurs over specific areas (without a mask)
Blurred areas in top left, near center, and bottom.
"[0:v]crop=50:50:20:10,boxblur=10[b0];
[0:v]crop=iw:30:(iw-ow)/2:ih-oh,boxblur=10[b1];
[0:v]crop=100:100:120:80,boxblur=10[b2];
[0:v][b0]overlay=20:10[ovr0];
[ovr0][b1]overlay=(W-w)/2:H-h[ovr1];
[ovr1][b2]overlay=120:80"
Specific area not blurred (without a mask)
"[0:v]boxblur=10[bg];[0:v]crop=200:200:60:30[fg];[bg][fg]overlay=60:30"
Additional stuff
The audio is being stream copied (re-muxed). No re-encoding, so it is fast and preserves the quality.
The blurred area will have a hard edge.
The blurred area can be moved around if you're good with arithmetic expressions, or see the sendcmd or zmq filters.
If you want to blur for a certain duration use the
enableoption on the boxblur or the overlay.See the FFmpeg Filters Documentation for other blurring filters (sab, smartblur, unsharp).
Some related questions: How to blur a short scene in a video and How to add pixellate effect.
edited May 23 '17 at 12:41
Community♦
1
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
edited May 23 '17 at 12:41
Community♦
1
edited May 23 '17 at 12:41
Community♦
1
edited May 23 '17 at 12:41
Community♦
1
1
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
answered Apr 15 '15 at 4:30
lloganllogan
25.8k54782
25.8k54782
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
1
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this errorUnrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found
– Jim
May 3 '17 at 18:10
1
@Jim I noticed that my example command was missing a quote. You command should look something like this:ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4
– llogan
May 3 '17 at 19:51
|
show 7 more comments
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
1
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this errorUnrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found
– Jim
May 3 '17 at 18:10
1
@Jim I noticed that my example command was missing a quote. You command should look something like this:ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4
– llogan
May 3 '17 at 19:51
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks so much for your response. That all makes great sense. As a side note, it also made the split filter make sense finally! Also, could it be possible through arithmetic expressions to dynamically move the blurred box around the image? I.E. for the purpose of blurring someone's face as they move in a non-linear fashion?
– occvtech
Apr 15 '15 at 21:49
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
Thanks again! I'll take a crack at it. I know that a non-linear editor would be 1000 times easier here, but I'm hoping to batch process multiple files and don't want to wait through the import/key frame/export process. Thanks again!
– occvtech
Apr 16 '15 at 15:11
1
1
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
does FFMPEG offer other shapes besides boxes, such as circles?
– Sun
Sep 23 '15 at 16:09
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this error
Unrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found– Jim
May 3 '17 at 18:10
@LordNeckbeard I'm using cmd and I want to use Example 1 but when I execute the code I get this error
Unrecognized option 'filter_complex[0:v]crop=200:200:60:30,boxblur=10[fg];[0:v][fg]overlay=60:30[v]-map [v] -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4'. Error splitting the argument list: Option not found– Jim
May 3 '17 at 18:10
1
1
@Jim I noticed that my example command was missing a quote. You command should look something like this:
ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4– llogan
May 3 '17 at 19:51
@Jim I noticed that my example command was missing a quote. You command should look something like this:
ffmpeg -i input.mp4 -filter_complex "[0:v]crop=200:200:60:30,boxblur=10[fg]; [0:v][fg]overlay=60:30[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart output.mp4– llogan
May 3 '17 at 19:51
|
show 7 more comments
For the case when one dislikes the sharp edge of the blurring, I made a script that layers different stages of blurring so that the edge is not sharp and it looks like this:
Instead of this:
It is a python script:
#!/usr/bin/env python3
import os,stat
def blur_softly(matrix,video_in="video_to_be_blurred.mp4",video_out=""):
if video_out == "":
video_out = video_in[:-4] + "_blurred" + video_in[-4:]
s0 = "ffmpeg -i " + video_in + " -filter_complex \n"[0:v]null[v_int0]; \n"
s1 = ''
a = 0
for m in matrix:
blur = m[6]
multiple = m[7]
width = m[0]+blur*multiple*2
height = m[1]+blur*multiple*2
x_cord = m[2]-blur*multiple
y_cord = m[3]-blur*multiple
timein = m[4]
timeout = m[5]
step = m[8]
margin = m[9]
for i in range(blur):
ii = multiple*i
s0 = s0 + "[v_int0]crop="+str(width-2*ii+(margin//2)*2)+":"+str(height-2*ii+(margin//2)*2)+":"+str(x_cord+ii-margin//2)+":"+str(y_cord+ii-margin//2) +
",boxblur="+str((i+1)*step)+":enable='between(t,"+str(timein)+","+str(timeout)+
")',crop="+str(width-2*ii)+ ":"+str(height-2*ii)+":"+str(margin//2)+":"+str(margin//2)+ "[blur_int" + str(i+1+a)+"]; \n"
s1 = s1 + "[v_int"+ str(i+a) +"][blur_int"+str(i+a+1)+"]overlay="+str(x_cord+ii)+":"+str(y_cord+ii)+":enable='between(t,"+str(timein)+","+str(timeout)+ ")'[v_int"+str(i+a+1)+"]; \n"
a += i+1
s = s0 + s1 + "[v_int"+str(a)+"]null[with_subtitles]" \n-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -preset slow -y "+video_out+"n"
print(s)
file_object = open('blur.sh', 'w')
file_object.write(s)
file_object.close()
st = os.stat('blur.sh')
os.chmod('blur.sh', st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
#w,h,x,y,timein,timeout,blur,multiple,step,margin
matrix = [[729,70,599,499,14.96,16.40,25,1,1,90],]
blur_softly(matrix,video_in="your_video.mp4",video_out="output_video.mp4")
You can change the parameters in the last and penultimate lines, the last two parametres between quatation marks are path to your video and output video (assuming they are placed in the working directory). In the penultimate line:
- the first two numbers indicate the size of the initial area to which maximum blur will be applied,
- the second two indicate the x and y coordinates thereof,
- the third two indicate the times in seconds when the blurring should be applied,
- "25" in this example indicates that there will be 25 boxes applied on top of each other)
- the next "1" indicates that bigger boxes with less blurr should be just one pixel wider than their predecessors
- the second "1" indicates that blurring should increase by one until until maximum of 25 (from above)
- "30" indicates the margin that is taken into consideration for applying the blur, so increasing this makes the blur respect more of its surrounding. Increasing this value also solves error texted like
Invalid chroma radius value 21, must be >= 0 and <= 20
By running it, one should get an output like the following (it gets written to a filethat can be run and printed on the output that can be copypasted and run):
ffmpeg -i video_to_be_blurred.mp4 -filter_complex
"[0:v]null[v_int0];
[v_int0]crop=869:210:529:429,boxblur=1:enable='between(t,14.96,16.4)',crop=779:120:45:45[blur_int1];
[v_int0]crop=867:208:530:430,boxblur=2:enable='between(t,14.96,16.4)',crop=777:118:45:45[blur_int2];
[v_int0]crop=865:206:531:431,boxblur=3:enable='between(t,14.96,16.4)',crop=775:116:45:45[blur_int3];
[v_int0]crop=863:204:532:432,boxblur=4:enable='between(t,14.96,16.4)',crop=773:114:45:45[blur_int4];
[v_int0]crop=861:202:533:433,boxblur=5:enable='between(t,14.96,16.4)',crop=771:112:45:45[blur_int5];
[v_int0]crop=859:200:534:434,boxblur=6:enable='between(t,14.96,16.4)',crop=769:110:45:45[blur_int6];
[v_int0]crop=857:198:535:435,boxblur=7:enable='between(t,14.96,16.4)',crop=767:108:45:45[blur_int7];
[v_int0]crop=855:196:536:436,boxblur=8:enable='between(t,14.96,16.4)',crop=765:106:45:45[blur_int8];
[v_int0]crop=853:194:537:437,boxblur=9:enable='between(t,14.96,16.4)',crop=763:104:45:45[blur_int9];
[v_int0]crop=851:192:538:438,boxblur=10:enable='between(t,14.96,16.4)',crop=761:102:45:45[blur_int10];
[v_int0]crop=849:190:539:439,boxblur=11:enable='between(t,14.96,16.4)',crop=759:100:45:45[blur_int11];
[v_int0]crop=847:188:540:440,boxblur=12:enable='between(t,14.96,16.4)',crop=757:98:45:45[blur_int12];
[v_int0]crop=845:186:541:441,boxblur=13:enable='between(t,14.96,16.4)',crop=755:96:45:45[blur_int13];
[v_int0]crop=843:184:542:442,boxblur=14:enable='between(t,14.96,16.4)',crop=753:94:45:45[blur_int14];
[v_int0]crop=841:182:543:443,boxblur=15:enable='between(t,14.96,16.4)',crop=751:92:45:45[blur_int15];
[v_int0]crop=839:180:544:444,boxblur=16:enable='between(t,14.96,16.4)',crop=749:90:45:45[blur_int16];
[v_int0]crop=837:178:545:445,boxblur=17:enable='between(t,14.96,16.4)',crop=747:88:45:45[blur_int17];
[v_int0]crop=835:176:546:446,boxblur=18:enable='between(t,14.96,16.4)',crop=745:86:45:45[blur_int18];
[v_int0]crop=833:174:547:447,boxblur=19:enable='between(t,14.96,16.4)',crop=743:84:45:45[blur_int19];
[v_int0]crop=831:172:548:448,boxblur=20:enable='between(t,14.96,16.4)',crop=741:82:45:45[blur_int20];
[v_int0]crop=829:170:549:449,boxblur=21:enable='between(t,14.96,16.4)',crop=739:80:45:45[blur_int21];
[v_int0]crop=827:168:550:450,boxblur=22:enable='between(t,14.96,16.4)',crop=737:78:45:45[blur_int22];
[v_int0]crop=825:166:551:451,boxblur=23:enable='between(t,14.96,16.4)',crop=735:76:45:45[blur_int23];
[v_int0]crop=823:164:552:452,boxblur=24:enable='between(t,14.96,16.4)',crop=733:74:45:45[blur_int24];
[v_int0]crop=821:162:553:453,boxblur=25:enable='between(t,14.96,16.4)',crop=731:72:45:45[blur_int25];
[v_int0][blur_int1]overlay=574:474:enable='between(t,14.96,16.4)'[v_int1];
[v_int1][blur_int2]overlay=575:475:enable='between(t,14.96,16.4)'[v_int2];
[v_int2][blur_int3]overlay=576:476:enable='between(t,14.96,16.4)'[v_int3];
[v_int3][blur_int4]overlay=577:477:enable='between(t,14.96,16.4)'[v_int4];
[v_int4][blur_int5]overlay=578:478:enable='between(t,14.96,16.4)'[v_int5];
[v_int5][blur_int6]overlay=579:479:enable='between(t,14.96,16.4)'[v_int6];
[v_int6][blur_int7]overlay=580:480:enable='between(t,14.96,16.4)'[v_int7];
[v_int7][blur_int8]overlay=581:481:enable='between(t,14.96,16.4)'[v_int8];
[v_int8][blur_int9]overlay=582:482:enable='between(t,14.96,16.4)'[v_int9];
[v_int9][blur_int10]overlay=583:483:enable='between(t,14.96,16.4)'[v_int10];
[v_int10][blur_int11]overlay=584:484:enable='between(t,14.96,16.4)'[v_int11];
[v_int11][blur_int12]overlay=585:485:enable='between(t,14.96,16.4)'[v_int12];
[v_int12][blur_int13]overlay=586:486:enable='between(t,14.96,16.4)'[v_int13];
[v_int13][blur_int14]overlay=587:487:enable='between(t,14.96,16.4)'[v_int14];
[v_int14][blur_int15]overlay=588:488:enable='between(t,14.96,16.4)'[v_int15];
[v_int15][blur_int16]overlay=589:489:enable='between(t,14.96,16.4)'[v_int16];
[v_int16][blur_int17]overlay=590:490:enable='between(t,14.96,16.4)'[v_int17];
[v_int17][blur_int18]overlay=591:491:enable='between(t,14.96,16.4)'[v_int18];
[v_int18][blur_int19]overlay=592:492:enable='between(t,14.96,16.4)'[v_int19];
[v_int19][blur_int20]overlay=593:493:enable='between(t,14.96,16.4)'[v_int20];
[v_int20][blur_int21]overlay=594:494:enable='between(t,14.96,16.4)'[v_int21];
[v_int21][blur_int22]overlay=595:495:enable='between(t,14.96,16.4)'[v_int22];
[v_int22][blur_int23]overlay=596:496:enable='between(t,14.96,16.4)'[v_int23];
[v_int23][blur_int24]overlay=597:497:enable='between(t,14.96,16.4)'[v_int24];
[v_int24][blur_int25]overlay=598:498:enable='between(t,14.96,16.4)'[v_int25];
[v_int25]null[with_subtitles]"
-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -slow preset -y video_to_be_blurred_blurred.mp4
answered Feb 22 at 9:45
supsup
3171515
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
add a comment |
For the case when one dislikes the sharp edge of the blurring, I made a script that layers different stages of blurring so that the edge is not sharp and it looks like this:
Instead of this:
It is a python script:
#!/usr/bin/env python3
import os,stat
def blur_softly(matrix,video_in="video_to_be_blurred.mp4",video_out=""):
if video_out == "":
video_out = video_in[:-4] + "_blurred" + video_in[-4:]
s0 = "ffmpeg -i " + video_in + " -filter_complex \n"[0:v]null[v_int0]; \n"
s1 = ''
a = 0
for m in matrix:
blur = m[6]
multiple = m[7]
width = m[0]+blur*multiple*2
height = m[1]+blur*multiple*2
x_cord = m[2]-blur*multiple
y_cord = m[3]-blur*multiple
timein = m[4]
timeout = m[5]
step = m[8]
margin = m[9]
for i in range(blur):
ii = multiple*i
s0 = s0 + "[v_int0]crop="+str(width-2*ii+(margin//2)*2)+":"+str(height-2*ii+(margin//2)*2)+":"+str(x_cord+ii-margin//2)+":"+str(y_cord+ii-margin//2) +
",boxblur="+str((i+1)*step)+":enable='between(t,"+str(timein)+","+str(timeout)+
")',crop="+str(width-2*ii)+ ":"+str(height-2*ii)+":"+str(margin//2)+":"+str(margin//2)+ "[blur_int" + str(i+1+a)+"]; \n"
s1 = s1 + "[v_int"+ str(i+a) +"][blur_int"+str(i+a+1)+"]overlay="+str(x_cord+ii)+":"+str(y_cord+ii)+":enable='between(t,"+str(timein)+","+str(timeout)+ ")'[v_int"+str(i+a+1)+"]; \n"
a += i+1
s = s0 + s1 + "[v_int"+str(a)+"]null[with_subtitles]" \n-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -preset slow -y "+video_out+"n"
print(s)
file_object = open('blur.sh', 'w')
file_object.write(s)
file_object.close()
st = os.stat('blur.sh')
os.chmod('blur.sh', st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
#w,h,x,y,timein,timeout,blur,multiple,step,margin
matrix = [[729,70,599,499,14.96,16.40,25,1,1,90],]
blur_softly(matrix,video_in="your_video.mp4",video_out="output_video.mp4")
You can change the parameters in the last and penultimate lines, the last two parametres between quatation marks are path to your video and output video (assuming they are placed in the working directory). In the penultimate line:
- the first two numbers indicate the size of the initial area to which maximum blur will be applied,
- the second two indicate the x and y coordinates thereof,
- the third two indicate the times in seconds when the blurring should be applied,
- "25" in this example indicates that there will be 25 boxes applied on top of each other)
- the next "1" indicates that bigger boxes with less blurr should be just one pixel wider than their predecessors
- the second "1" indicates that blurring should increase by one until until maximum of 25 (from above)
- "30" indicates the margin that is taken into consideration for applying the blur, so increasing this makes the blur respect more of its surrounding. Increasing this value also solves error texted like
Invalid chroma radius value 21, must be >= 0 and <= 20
By running it, one should get an output like the following (it gets written to a filethat can be run and printed on the output that can be copypasted and run):
ffmpeg -i video_to_be_blurred.mp4 -filter_complex
"[0:v]null[v_int0];
[v_int0]crop=869:210:529:429,boxblur=1:enable='between(t,14.96,16.4)',crop=779:120:45:45[blur_int1];
[v_int0]crop=867:208:530:430,boxblur=2:enable='between(t,14.96,16.4)',crop=777:118:45:45[blur_int2];
[v_int0]crop=865:206:531:431,boxblur=3:enable='between(t,14.96,16.4)',crop=775:116:45:45[blur_int3];
[v_int0]crop=863:204:532:432,boxblur=4:enable='between(t,14.96,16.4)',crop=773:114:45:45[blur_int4];
[v_int0]crop=861:202:533:433,boxblur=5:enable='between(t,14.96,16.4)',crop=771:112:45:45[blur_int5];
[v_int0]crop=859:200:534:434,boxblur=6:enable='between(t,14.96,16.4)',crop=769:110:45:45[blur_int6];
[v_int0]crop=857:198:535:435,boxblur=7:enable='between(t,14.96,16.4)',crop=767:108:45:45[blur_int7];
[v_int0]crop=855:196:536:436,boxblur=8:enable='between(t,14.96,16.4)',crop=765:106:45:45[blur_int8];
[v_int0]crop=853:194:537:437,boxblur=9:enable='between(t,14.96,16.4)',crop=763:104:45:45[blur_int9];
[v_int0]crop=851:192:538:438,boxblur=10:enable='between(t,14.96,16.4)',crop=761:102:45:45[blur_int10];
[v_int0]crop=849:190:539:439,boxblur=11:enable='between(t,14.96,16.4)',crop=759:100:45:45[blur_int11];
[v_int0]crop=847:188:540:440,boxblur=12:enable='between(t,14.96,16.4)',crop=757:98:45:45[blur_int12];
[v_int0]crop=845:186:541:441,boxblur=13:enable='between(t,14.96,16.4)',crop=755:96:45:45[blur_int13];
[v_int0]crop=843:184:542:442,boxblur=14:enable='between(t,14.96,16.4)',crop=753:94:45:45[blur_int14];
[v_int0]crop=841:182:543:443,boxblur=15:enable='between(t,14.96,16.4)',crop=751:92:45:45[blur_int15];
[v_int0]crop=839:180:544:444,boxblur=16:enable='between(t,14.96,16.4)',crop=749:90:45:45[blur_int16];
[v_int0]crop=837:178:545:445,boxblur=17:enable='between(t,14.96,16.4)',crop=747:88:45:45[blur_int17];
[v_int0]crop=835:176:546:446,boxblur=18:enable='between(t,14.96,16.4)',crop=745:86:45:45[blur_int18];
[v_int0]crop=833:174:547:447,boxblur=19:enable='between(t,14.96,16.4)',crop=743:84:45:45[blur_int19];
[v_int0]crop=831:172:548:448,boxblur=20:enable='between(t,14.96,16.4)',crop=741:82:45:45[blur_int20];
[v_int0]crop=829:170:549:449,boxblur=21:enable='between(t,14.96,16.4)',crop=739:80:45:45[blur_int21];
[v_int0]crop=827:168:550:450,boxblur=22:enable='between(t,14.96,16.4)',crop=737:78:45:45[blur_int22];
[v_int0]crop=825:166:551:451,boxblur=23:enable='between(t,14.96,16.4)',crop=735:76:45:45[blur_int23];
[v_int0]crop=823:164:552:452,boxblur=24:enable='between(t,14.96,16.4)',crop=733:74:45:45[blur_int24];
[v_int0]crop=821:162:553:453,boxblur=25:enable='between(t,14.96,16.4)',crop=731:72:45:45[blur_int25];
[v_int0][blur_int1]overlay=574:474:enable='between(t,14.96,16.4)'[v_int1];
[v_int1][blur_int2]overlay=575:475:enable='between(t,14.96,16.4)'[v_int2];
[v_int2][blur_int3]overlay=576:476:enable='between(t,14.96,16.4)'[v_int3];
[v_int3][blur_int4]overlay=577:477:enable='between(t,14.96,16.4)'[v_int4];
[v_int4][blur_int5]overlay=578:478:enable='between(t,14.96,16.4)'[v_int5];
[v_int5][blur_int6]overlay=579:479:enable='between(t,14.96,16.4)'[v_int6];
[v_int6][blur_int7]overlay=580:480:enable='between(t,14.96,16.4)'[v_int7];
[v_int7][blur_int8]overlay=581:481:enable='between(t,14.96,16.4)'[v_int8];
[v_int8][blur_int9]overlay=582:482:enable='between(t,14.96,16.4)'[v_int9];
[v_int9][blur_int10]overlay=583:483:enable='between(t,14.96,16.4)'[v_int10];
[v_int10][blur_int11]overlay=584:484:enable='between(t,14.96,16.4)'[v_int11];
[v_int11][blur_int12]overlay=585:485:enable='between(t,14.96,16.4)'[v_int12];
[v_int12][blur_int13]overlay=586:486:enable='between(t,14.96,16.4)'[v_int13];
[v_int13][blur_int14]overlay=587:487:enable='between(t,14.96,16.4)'[v_int14];
[v_int14][blur_int15]overlay=588:488:enable='between(t,14.96,16.4)'[v_int15];
[v_int15][blur_int16]overlay=589:489:enable='between(t,14.96,16.4)'[v_int16];
[v_int16][blur_int17]overlay=590:490:enable='between(t,14.96,16.4)'[v_int17];
[v_int17][blur_int18]overlay=591:491:enable='between(t,14.96,16.4)'[v_int18];
[v_int18][blur_int19]overlay=592:492:enable='between(t,14.96,16.4)'[v_int19];
[v_int19][blur_int20]overlay=593:493:enable='between(t,14.96,16.4)'[v_int20];
[v_int20][blur_int21]overlay=594:494:enable='between(t,14.96,16.4)'[v_int21];
[v_int21][blur_int22]overlay=595:495:enable='between(t,14.96,16.4)'[v_int22];
[v_int22][blur_int23]overlay=596:496:enable='between(t,14.96,16.4)'[v_int23];
[v_int23][blur_int24]overlay=597:497:enable='between(t,14.96,16.4)'[v_int24];
[v_int24][blur_int25]overlay=598:498:enable='between(t,14.96,16.4)'[v_int25];
[v_int25]null[with_subtitles]"
-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -slow preset -y video_to_be_blurred_blurred.mp4
answered Feb 22 at 9:45
supsup
3171515
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
add a comment |
For the case when one dislikes the sharp edge of the blurring, I made a script that layers different stages of blurring so that the edge is not sharp and it looks like this:
Instead of this:
It is a python script:
#!/usr/bin/env python3
import os,stat
def blur_softly(matrix,video_in="video_to_be_blurred.mp4",video_out=""):
if video_out == "":
video_out = video_in[:-4] + "_blurred" + video_in[-4:]
s0 = "ffmpeg -i " + video_in + " -filter_complex \n"[0:v]null[v_int0]; \n"
s1 = ''
a = 0
for m in matrix:
blur = m[6]
multiple = m[7]
width = m[0]+blur*multiple*2
height = m[1]+blur*multiple*2
x_cord = m[2]-blur*multiple
y_cord = m[3]-blur*multiple
timein = m[4]
timeout = m[5]
step = m[8]
margin = m[9]
for i in range(blur):
ii = multiple*i
s0 = s0 + "[v_int0]crop="+str(width-2*ii+(margin//2)*2)+":"+str(height-2*ii+(margin//2)*2)+":"+str(x_cord+ii-margin//2)+":"+str(y_cord+ii-margin//2) +
",boxblur="+str((i+1)*step)+":enable='between(t,"+str(timein)+","+str(timeout)+
")',crop="+str(width-2*ii)+ ":"+str(height-2*ii)+":"+str(margin//2)+":"+str(margin//2)+ "[blur_int" + str(i+1+a)+"]; \n"
s1 = s1 + "[v_int"+ str(i+a) +"][blur_int"+str(i+a+1)+"]overlay="+str(x_cord+ii)+":"+str(y_cord+ii)+":enable='between(t,"+str(timein)+","+str(timeout)+ ")'[v_int"+str(i+a+1)+"]; \n"
a += i+1
s = s0 + s1 + "[v_int"+str(a)+"]null[with_subtitles]" \n-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -preset slow -y "+video_out+"n"
print(s)
file_object = open('blur.sh', 'w')
file_object.write(s)
file_object.close()
st = os.stat('blur.sh')
os.chmod('blur.sh', st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
#w,h,x,y,timein,timeout,blur,multiple,step,margin
matrix = [[729,70,599,499,14.96,16.40,25,1,1,90],]
blur_softly(matrix,video_in="your_video.mp4",video_out="output_video.mp4")
You can change the parameters in the last and penultimate lines, the last two parametres between quatation marks are path to your video and output video (assuming they are placed in the working directory). In the penultimate line:
- the first two numbers indicate the size of the initial area to which maximum blur will be applied,
- the second two indicate the x and y coordinates thereof,
- the third two indicate the times in seconds when the blurring should be applied,
- "25" in this example indicates that there will be 25 boxes applied on top of each other)
- the next "1" indicates that bigger boxes with less blurr should be just one pixel wider than their predecessors
- the second "1" indicates that blurring should increase by one until until maximum of 25 (from above)
- "30" indicates the margin that is taken into consideration for applying the blur, so increasing this makes the blur respect more of its surrounding. Increasing this value also solves error texted like
Invalid chroma radius value 21, must be >= 0 and <= 20
By running it, one should get an output like the following (it gets written to a filethat can be run and printed on the output that can be copypasted and run):
ffmpeg -i video_to_be_blurred.mp4 -filter_complex
"[0:v]null[v_int0];
[v_int0]crop=869:210:529:429,boxblur=1:enable='between(t,14.96,16.4)',crop=779:120:45:45[blur_int1];
[v_int0]crop=867:208:530:430,boxblur=2:enable='between(t,14.96,16.4)',crop=777:118:45:45[blur_int2];
[v_int0]crop=865:206:531:431,boxblur=3:enable='between(t,14.96,16.4)',crop=775:116:45:45[blur_int3];
[v_int0]crop=863:204:532:432,boxblur=4:enable='between(t,14.96,16.4)',crop=773:114:45:45[blur_int4];
[v_int0]crop=861:202:533:433,boxblur=5:enable='between(t,14.96,16.4)',crop=771:112:45:45[blur_int5];
[v_int0]crop=859:200:534:434,boxblur=6:enable='between(t,14.96,16.4)',crop=769:110:45:45[blur_int6];
[v_int0]crop=857:198:535:435,boxblur=7:enable='between(t,14.96,16.4)',crop=767:108:45:45[blur_int7];
[v_int0]crop=855:196:536:436,boxblur=8:enable='between(t,14.96,16.4)',crop=765:106:45:45[blur_int8];
[v_int0]crop=853:194:537:437,boxblur=9:enable='between(t,14.96,16.4)',crop=763:104:45:45[blur_int9];
[v_int0]crop=851:192:538:438,boxblur=10:enable='between(t,14.96,16.4)',crop=761:102:45:45[blur_int10];
[v_int0]crop=849:190:539:439,boxblur=11:enable='between(t,14.96,16.4)',crop=759:100:45:45[blur_int11];
[v_int0]crop=847:188:540:440,boxblur=12:enable='between(t,14.96,16.4)',crop=757:98:45:45[blur_int12];
[v_int0]crop=845:186:541:441,boxblur=13:enable='between(t,14.96,16.4)',crop=755:96:45:45[blur_int13];
[v_int0]crop=843:184:542:442,boxblur=14:enable='between(t,14.96,16.4)',crop=753:94:45:45[blur_int14];
[v_int0]crop=841:182:543:443,boxblur=15:enable='between(t,14.96,16.4)',crop=751:92:45:45[blur_int15];
[v_int0]crop=839:180:544:444,boxblur=16:enable='between(t,14.96,16.4)',crop=749:90:45:45[blur_int16];
[v_int0]crop=837:178:545:445,boxblur=17:enable='between(t,14.96,16.4)',crop=747:88:45:45[blur_int17];
[v_int0]crop=835:176:546:446,boxblur=18:enable='between(t,14.96,16.4)',crop=745:86:45:45[blur_int18];
[v_int0]crop=833:174:547:447,boxblur=19:enable='between(t,14.96,16.4)',crop=743:84:45:45[blur_int19];
[v_int0]crop=831:172:548:448,boxblur=20:enable='between(t,14.96,16.4)',crop=741:82:45:45[blur_int20];
[v_int0]crop=829:170:549:449,boxblur=21:enable='between(t,14.96,16.4)',crop=739:80:45:45[blur_int21];
[v_int0]crop=827:168:550:450,boxblur=22:enable='between(t,14.96,16.4)',crop=737:78:45:45[blur_int22];
[v_int0]crop=825:166:551:451,boxblur=23:enable='between(t,14.96,16.4)',crop=735:76:45:45[blur_int23];
[v_int0]crop=823:164:552:452,boxblur=24:enable='between(t,14.96,16.4)',crop=733:74:45:45[blur_int24];
[v_int0]crop=821:162:553:453,boxblur=25:enable='between(t,14.96,16.4)',crop=731:72:45:45[blur_int25];
[v_int0][blur_int1]overlay=574:474:enable='between(t,14.96,16.4)'[v_int1];
[v_int1][blur_int2]overlay=575:475:enable='between(t,14.96,16.4)'[v_int2];
[v_int2][blur_int3]overlay=576:476:enable='between(t,14.96,16.4)'[v_int3];
[v_int3][blur_int4]overlay=577:477:enable='between(t,14.96,16.4)'[v_int4];
[v_int4][blur_int5]overlay=578:478:enable='between(t,14.96,16.4)'[v_int5];
[v_int5][blur_int6]overlay=579:479:enable='between(t,14.96,16.4)'[v_int6];
[v_int6][blur_int7]overlay=580:480:enable='between(t,14.96,16.4)'[v_int7];
[v_int7][blur_int8]overlay=581:481:enable='between(t,14.96,16.4)'[v_int8];
[v_int8][blur_int9]overlay=582:482:enable='between(t,14.96,16.4)'[v_int9];
[v_int9][blur_int10]overlay=583:483:enable='between(t,14.96,16.4)'[v_int10];
[v_int10][blur_int11]overlay=584:484:enable='between(t,14.96,16.4)'[v_int11];
[v_int11][blur_int12]overlay=585:485:enable='between(t,14.96,16.4)'[v_int12];
[v_int12][blur_int13]overlay=586:486:enable='between(t,14.96,16.4)'[v_int13];
[v_int13][blur_int14]overlay=587:487:enable='between(t,14.96,16.4)'[v_int14];
[v_int14][blur_int15]overlay=588:488:enable='between(t,14.96,16.4)'[v_int15];
[v_int15][blur_int16]overlay=589:489:enable='between(t,14.96,16.4)'[v_int16];
[v_int16][blur_int17]overlay=590:490:enable='between(t,14.96,16.4)'[v_int17];
[v_int17][blur_int18]overlay=591:491:enable='between(t,14.96,16.4)'[v_int18];
[v_int18][blur_int19]overlay=592:492:enable='between(t,14.96,16.4)'[v_int19];
[v_int19][blur_int20]overlay=593:493:enable='between(t,14.96,16.4)'[v_int20];
[v_int20][blur_int21]overlay=594:494:enable='between(t,14.96,16.4)'[v_int21];
[v_int21][blur_int22]overlay=595:495:enable='between(t,14.96,16.4)'[v_int22];
[v_int22][blur_int23]overlay=596:496:enable='between(t,14.96,16.4)'[v_int23];
[v_int23][blur_int24]overlay=597:497:enable='between(t,14.96,16.4)'[v_int24];
[v_int24][blur_int25]overlay=598:498:enable='between(t,14.96,16.4)'[v_int25];
[v_int25]null[with_subtitles]"
-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -slow preset -y video_to_be_blurred_blurred.mp4
answered Feb 22 at 9:45
supsup
3171515
For the case when one dislikes the sharp edge of the blurring, I made a script that layers different stages of blurring so that the edge is not sharp and it looks like this:
Instead of this:
It is a python script:
#!/usr/bin/env python3
import os,stat
def blur_softly(matrix,video_in="video_to_be_blurred.mp4",video_out=""):
if video_out == "":
video_out = video_in[:-4] + "_blurred" + video_in[-4:]
s0 = "ffmpeg -i " + video_in + " -filter_complex \n"[0:v]null[v_int0]; \n"
s1 = ''
a = 0
for m in matrix:
blur = m[6]
multiple = m[7]
width = m[0]+blur*multiple*2
height = m[1]+blur*multiple*2
x_cord = m[2]-blur*multiple
y_cord = m[3]-blur*multiple
timein = m[4]
timeout = m[5]
step = m[8]
margin = m[9]
for i in range(blur):
ii = multiple*i
s0 = s0 + "[v_int0]crop="+str(width-2*ii+(margin//2)*2)+":"+str(height-2*ii+(margin//2)*2)+":"+str(x_cord+ii-margin//2)+":"+str(y_cord+ii-margin//2) +
",boxblur="+str((i+1)*step)+":enable='between(t,"+str(timein)+","+str(timeout)+
")',crop="+str(width-2*ii)+ ":"+str(height-2*ii)+":"+str(margin//2)+":"+str(margin//2)+ "[blur_int" + str(i+1+a)+"]; \n"
s1 = s1 + "[v_int"+ str(i+a) +"][blur_int"+str(i+a+1)+"]overlay="+str(x_cord+ii)+":"+str(y_cord+ii)+":enable='between(t,"+str(timein)+","+str(timeout)+ ")'[v_int"+str(i+a+1)+"]; \n"
a += i+1
s = s0 + s1 + "[v_int"+str(a)+"]null[with_subtitles]" \n-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -preset slow -y "+video_out+"n"
print(s)
file_object = open('blur.sh', 'w')
file_object.write(s)
file_object.close()
st = os.stat('blur.sh')
os.chmod('blur.sh', st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
#w,h,x,y,timein,timeout,blur,multiple,step,margin
matrix = [[729,70,599,499,14.96,16.40,25,1,1,90],]
blur_softly(matrix,video_in="your_video.mp4",video_out="output_video.mp4")
You can change the parameters in the last and penultimate lines, the last two parametres between quatation marks are path to your video and output video (assuming they are placed in the working directory). In the penultimate line:
- the first two numbers indicate the size of the initial area to which maximum blur will be applied,
- the second two indicate the x and y coordinates thereof,
- the third two indicate the times in seconds when the blurring should be applied,
- "25" in this example indicates that there will be 25 boxes applied on top of each other)
- the next "1" indicates that bigger boxes with less blurr should be just one pixel wider than their predecessors
- the second "1" indicates that blurring should increase by one until until maximum of 25 (from above)
- "30" indicates the margin that is taken into consideration for applying the blur, so increasing this makes the blur respect more of its surrounding. Increasing this value also solves error texted like
Invalid chroma radius value 21, must be >= 0 and <= 20
By running it, one should get an output like the following (it gets written to a filethat can be run and printed on the output that can be copypasted and run):
ffmpeg -i video_to_be_blurred.mp4 -filter_complex
"[0:v]null[v_int0];
[v_int0]crop=869:210:529:429,boxblur=1:enable='between(t,14.96,16.4)',crop=779:120:45:45[blur_int1];
[v_int0]crop=867:208:530:430,boxblur=2:enable='between(t,14.96,16.4)',crop=777:118:45:45[blur_int2];
[v_int0]crop=865:206:531:431,boxblur=3:enable='between(t,14.96,16.4)',crop=775:116:45:45[blur_int3];
[v_int0]crop=863:204:532:432,boxblur=4:enable='between(t,14.96,16.4)',crop=773:114:45:45[blur_int4];
[v_int0]crop=861:202:533:433,boxblur=5:enable='between(t,14.96,16.4)',crop=771:112:45:45[blur_int5];
[v_int0]crop=859:200:534:434,boxblur=6:enable='between(t,14.96,16.4)',crop=769:110:45:45[blur_int6];
[v_int0]crop=857:198:535:435,boxblur=7:enable='between(t,14.96,16.4)',crop=767:108:45:45[blur_int7];
[v_int0]crop=855:196:536:436,boxblur=8:enable='between(t,14.96,16.4)',crop=765:106:45:45[blur_int8];
[v_int0]crop=853:194:537:437,boxblur=9:enable='between(t,14.96,16.4)',crop=763:104:45:45[blur_int9];
[v_int0]crop=851:192:538:438,boxblur=10:enable='between(t,14.96,16.4)',crop=761:102:45:45[blur_int10];
[v_int0]crop=849:190:539:439,boxblur=11:enable='between(t,14.96,16.4)',crop=759:100:45:45[blur_int11];
[v_int0]crop=847:188:540:440,boxblur=12:enable='between(t,14.96,16.4)',crop=757:98:45:45[blur_int12];
[v_int0]crop=845:186:541:441,boxblur=13:enable='between(t,14.96,16.4)',crop=755:96:45:45[blur_int13];
[v_int0]crop=843:184:542:442,boxblur=14:enable='between(t,14.96,16.4)',crop=753:94:45:45[blur_int14];
[v_int0]crop=841:182:543:443,boxblur=15:enable='between(t,14.96,16.4)',crop=751:92:45:45[blur_int15];
[v_int0]crop=839:180:544:444,boxblur=16:enable='between(t,14.96,16.4)',crop=749:90:45:45[blur_int16];
[v_int0]crop=837:178:545:445,boxblur=17:enable='between(t,14.96,16.4)',crop=747:88:45:45[blur_int17];
[v_int0]crop=835:176:546:446,boxblur=18:enable='between(t,14.96,16.4)',crop=745:86:45:45[blur_int18];
[v_int0]crop=833:174:547:447,boxblur=19:enable='between(t,14.96,16.4)',crop=743:84:45:45[blur_int19];
[v_int0]crop=831:172:548:448,boxblur=20:enable='between(t,14.96,16.4)',crop=741:82:45:45[blur_int20];
[v_int0]crop=829:170:549:449,boxblur=21:enable='between(t,14.96,16.4)',crop=739:80:45:45[blur_int21];
[v_int0]crop=827:168:550:450,boxblur=22:enable='between(t,14.96,16.4)',crop=737:78:45:45[blur_int22];
[v_int0]crop=825:166:551:451,boxblur=23:enable='between(t,14.96,16.4)',crop=735:76:45:45[blur_int23];
[v_int0]crop=823:164:552:452,boxblur=24:enable='between(t,14.96,16.4)',crop=733:74:45:45[blur_int24];
[v_int0]crop=821:162:553:453,boxblur=25:enable='between(t,14.96,16.4)',crop=731:72:45:45[blur_int25];
[v_int0][blur_int1]overlay=574:474:enable='between(t,14.96,16.4)'[v_int1];
[v_int1][blur_int2]overlay=575:475:enable='between(t,14.96,16.4)'[v_int2];
[v_int2][blur_int3]overlay=576:476:enable='between(t,14.96,16.4)'[v_int3];
[v_int3][blur_int4]overlay=577:477:enable='between(t,14.96,16.4)'[v_int4];
[v_int4][blur_int5]overlay=578:478:enable='between(t,14.96,16.4)'[v_int5];
[v_int5][blur_int6]overlay=579:479:enable='between(t,14.96,16.4)'[v_int6];
[v_int6][blur_int7]overlay=580:480:enable='between(t,14.96,16.4)'[v_int7];
[v_int7][blur_int8]overlay=581:481:enable='between(t,14.96,16.4)'[v_int8];
[v_int8][blur_int9]overlay=582:482:enable='between(t,14.96,16.4)'[v_int9];
[v_int9][blur_int10]overlay=583:483:enable='between(t,14.96,16.4)'[v_int10];
[v_int10][blur_int11]overlay=584:484:enable='between(t,14.96,16.4)'[v_int11];
[v_int11][blur_int12]overlay=585:485:enable='between(t,14.96,16.4)'[v_int12];
[v_int12][blur_int13]overlay=586:486:enable='between(t,14.96,16.4)'[v_int13];
[v_int13][blur_int14]overlay=587:487:enable='between(t,14.96,16.4)'[v_int14];
[v_int14][blur_int15]overlay=588:488:enable='between(t,14.96,16.4)'[v_int15];
[v_int15][blur_int16]overlay=589:489:enable='between(t,14.96,16.4)'[v_int16];
[v_int16][blur_int17]overlay=590:490:enable='between(t,14.96,16.4)'[v_int17];
[v_int17][blur_int18]overlay=591:491:enable='between(t,14.96,16.4)'[v_int18];
[v_int18][blur_int19]overlay=592:492:enable='between(t,14.96,16.4)'[v_int19];
[v_int19][blur_int20]overlay=593:493:enable='between(t,14.96,16.4)'[v_int20];
[v_int20][blur_int21]overlay=594:494:enable='between(t,14.96,16.4)'[v_int21];
[v_int21][blur_int22]overlay=595:495:enable='between(t,14.96,16.4)'[v_int22];
[v_int22][blur_int23]overlay=596:496:enable='between(t,14.96,16.4)'[v_int23];
[v_int23][blur_int24]overlay=597:497:enable='between(t,14.96,16.4)'[v_int24];
[v_int24][blur_int25]overlay=598:498:enable='between(t,14.96,16.4)'[v_int25];
[v_int25]null[with_subtitles]"
-map "[with_subtitles]" -map 0:a -c:v libx264 -c:a copy -crf 17 -slow preset -y video_to_be_blurred_blurred.mp4
answered Feb 22 at 9:45
supsup
3171515
edited 5 hours ago
answered Feb 22 at 9:45
supsup
3171515
answered Feb 22 at 9:45
supsup
3171515
answered Feb 22 at 9:45
supsup
3171515
3171515
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
add a comment |
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
If anybody knows about a easier way to achieve blury edges, I would be interested. Also, this is rather slow.
– sup
Feb 22 at 9:46
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
Apply a box blur to the mask before merging it.
– Gyan
Feb 22 at 10:45
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
@Gyan What do you mean? I think I am doing that already.
– sup
2 days ago
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
Anyway, I improved the code further on, I am still not sure I am doing what you recommended.
– sup
yesterday
add a comment |
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