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start /affinity parameter not work on ffmpeg in some situation

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0

I want to use start /affinity to reduce cpu usage of ffmpeg, but it doesn't work in some situation.

This will work:

start /low /affinity 1F ffmpeg -i a.mp4 b.mkv

This will not work:

start /low /affinity 1F ffmpeg -i a.mp4 -c:v libx265 -preset fast -x265-params crf=21 -c:a copy b.mkv

/low parameter works in both commands, but /affinity not.

windows ffmpeg cpu task-manager

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asked 4 mins ago

user2735005user2735005

1

add a comment | 

0

I want to use start /affinity to reduce cpu usage of ffmpeg, but it doesn't work in some situation.

This will work:

start /low /affinity 1F ffmpeg -i a.mp4 b.mkv

This will not work:

start /low /affinity 1F ffmpeg -i a.mp4 -c:v libx265 -preset fast -x265-params crf=21 -c:a copy b.mkv

/low parameter works in both commands, but /affinity not.

windows ffmpeg cpu task-manager

share

asked 4 mins ago

user2735005user2735005

1

add a comment | 

I want to use start /affinity to reduce cpu usage of ffmpeg, but it doesn't work in some situation.

This will work:

start /low /affinity 1F ffmpeg -i a.mp4 b.mkv

This will not work:

start /low /affinity 1F ffmpeg -i a.mp4 -c:v libx265 -preset fast -x265-params crf=21 -c:a copy b.mkv

/low parameter works in both commands, but /affinity not.

windows ffmpeg cpu task-manager

share

asked 4 mins ago

user2735005user2735005

1

share

asked 4 mins ago

user2735005user2735005

1

share

asked 4 mins ago

user2735005user2735005

1

asked 4 mins ago

user2735005user2735005

1

asked 4 mins ago

user2735005user2735005

1