[FFmpeg-user] audio video out of sync

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Jan 26 13:55:44 EET 2019

2019-01-26 6:02 GMT+01:00, Matthew Reus <matthew.reus01 at gmail.com>:

> I m taking a raw video from a box using* HDMI TO SDI* convert using
> *Decklink
> quad 2 *card , the stream will work fine for an hour . But after an hour
> the audio video goes oout of sync .
> ffmpeg -async 1 -vsync 1 -f decklink -i 'DeckLink Quad (3)@11' -pix_fmt
> yuv420p -r 30 -s 1920x1080 -vf "yadif=0:-1:0" -c:v h264_nvenc -gpu 0 -b:v
> 4000k -c:a aac -filter:a "volume=4" -aspect 16:9 -ac 2 -f flv
> rtmp://admin:netaccess@

Is there only an issue with rtmp output or also with file output?
For your next test, please remove the following options to ease
volume, aspect, ac, s, vsync, yadif

Please test current FFmpeg git head, Carl Eugen

More information about the ffmpeg-user mailing list