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ffmpeg high packet loss with UDP output

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2

I'm trying to transcode our hls streams into UDP multicast stream using ffmpeg, and I'm getting too many lost packets.

I'm using following command to transcode

ffmpeg 

-loglevel warning 

-nostats 

-re 

-max_reload 2 

-i "http://hls-server/stream/playlist.m3u8" 

-c:v copy 

-c:a copy 

-f mpegts 

-flush_packets 0 

"udp://remote-ip:40001?pkt_size=1316&buffer_size=8388608"

on the remote host I'm running client that checks mpegts headers continuity counter, and I'm getting an errors few times a minute.

I've tested the link between servers using iperf - 100 mb/s for half a hour without single packet lost.

I had this test running in parallel with ffmpeg and there was aforementioned packet loss for ffmpeg stream, but no packet loss for iperf.

I've already tried tweaking net.core.rmem_max and net.core.wmem_max with no success. I've tried increasing nic buffers using ethtool -G tx xxx also with no success. And I've already tried multiple versions of ffmpeg 3.3.9, 3.4.5, 4.0.3, and 4.1.

Do anyone have idea what could case this issue and how to fix it?

linux ffmpeg streaming udp

share|improve this question

edited Dec 27 '18 at 20:36

zx485

1,3691914

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111

add a comment | 

2

I'm trying to transcode our hls streams into UDP multicast stream using ffmpeg, and I'm getting too many lost packets.

I'm using following command to transcode

ffmpeg 

-loglevel warning 

-nostats 

-re 

-max_reload 2 

-i "http://hls-server/stream/playlist.m3u8" 

-c:v copy 

-c:a copy 

-f mpegts 

-flush_packets 0 

"udp://remote-ip:40001?pkt_size=1316&buffer_size=8388608"

on the remote host I'm running client that checks mpegts headers continuity counter, and I'm getting an errors few times a minute.

I've tested the link between servers using iperf - 100 mb/s for half a hour without single packet lost.

I had this test running in parallel with ffmpeg and there was aforementioned packet loss for ffmpeg stream, but no packet loss for iperf.

I've already tried tweaking net.core.rmem_max and net.core.wmem_max with no success. I've tried increasing nic buffers using ethtool -G tx xxx also with no success. And I've already tried multiple versions of ffmpeg 3.3.9, 3.4.5, 4.0.3, and 4.1.

Do anyone have idea what could case this issue and how to fix it?

linux ffmpeg streaming udp

share|improve this question

edited Dec 27 '18 at 20:36

zx485

1,3691914

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111

add a comment | 

I'm trying to transcode our hls streams into UDP multicast stream using ffmpeg, and I'm getting too many lost packets.

I'm using following command to transcode

ffmpeg 

-loglevel warning 

-nostats 

-re 

-max_reload 2 

-i "http://hls-server/stream/playlist.m3u8" 

-c:v copy 

-c:a copy 

-f mpegts 

-flush_packets 0 

"udp://remote-ip:40001?pkt_size=1316&buffer_size=8388608"

on the remote host I'm running client that checks mpegts headers continuity counter, and I'm getting an errors few times a minute.

I've tested the link between servers using iperf - 100 mb/s for half a hour without single packet lost.

I had this test running in parallel with ffmpeg and there was aforementioned packet loss for ffmpeg stream, but no packet loss for iperf.

I've already tried tweaking net.core.rmem_max and net.core.wmem_max with no success. I've tried increasing nic buffers using ethtool -G tx xxx also with no success. And I've already tried multiple versions of ffmpeg 3.3.9, 3.4.5, 4.0.3, and 4.1.

Do anyone have idea what could case this issue and how to fix it?

linux ffmpeg streaming udp

share|improve this question

edited Dec 27 '18 at 20:36

zx485

1,3691914

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111

ffmpeg 

-loglevel warning 

-nostats 

-re 

-max_reload 2 

-i "http://hls-server/stream/playlist.m3u8" 

-c:v copy 

-c:a copy 

-f mpegts 

-flush_packets 0 

"udp://remote-ip:40001?pkt_size=1316&buffer_size=8388608"

share|improve this question

edited Dec 27 '18 at 20:36

zx485

1,3691914

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111

share|improve this question

edited Dec 27 '18 at 20:36

zx485

1,3691914

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111

edited Dec 27 '18 at 20:36

zx485

1,3691914

edited Dec 27 '18 at 20:36

zx485

1,3691914

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111

asked Dec 27 '18 at 19:24

Tomáš HavlasTomáš Havlas

111