[FFmpeg-user] ffmpeg-10 audio and video sync problem.

[Ly Tran Cong]

Hi all,

I use this command to transcode multicast video to DarwinStreaming.

ffmpeg -i udp://239.30.10.6:5106?reuse=1
<http://239.30.10.6:5106/?reuse=1>-an -c:v libx264 -profile baseline
-preset ultrafast -r 25 -s 320x240 -b:v
128k -coder 0 -refs 3 -bf 0 -g 150 -keyint_min 20 -qmin 10 -qmax 51 -qdiff
4 -trellis 0 -flags +global_header -vsync 1 -copyts -f rtp rtp://
127.0.0.1:37130 -flags +global_header -vn -c:a libfaac -ar 22050 -b:a 8k
-ac 2 -vn -async 22050 -rtpflags +latm -fflags +latm -copyts -f rtp rtp://
127.0.0.1:37132

then I use vlc to play that stream but I have to refresh vlc many time.
Sometime I can hear audio, sometime I can watch video without audio and
sometime I can watch video faster than audio.

Please let me know is there any problem with my command or ffmpeg sync
problem.

Thanks

-- 
Regards,
Tran Ly

Vega Corporation
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