Thanks Carl, One of the things also that was happening was insufficient thread queue size. I was seeing this error:
Thread message queue blocking; consider raising the thread_queue_size option (current value: 8) I’ve been able to get audio and video sync’ed properly, video coming from one input device and audio from the other as follows: ffmpeg -y -thread_queue_size 512 -f decklink -vsync 0 -i 'UltraStudio Mini Recorder@12' -thread_queue_size 512 -f avfoundation -async 1 -i "none:1" -c:v libx264 -preset veryfast -vf scale=720:405 -c:a libfdk_aac -ac 2 -ar 48000 -map 0:1 -map 1:0 out.mp4 So far things seem to be working ok Ricardo > On Jul 28, 2015, at 9:04 AM, Carl Eugen Hoyos <ceho...@ag.or.at> wrote: > > Ricardo Kleemann <ricardo <at> americasnet.com> writes: > >> ffmpeg -f avfoundation -i "none:1" -f decklink -i > > You could try to move -vsync 0 in front of the > first input. > > If this does not help, it may be possible to insert > the setpts filter to make the timestamp of the first > frame "0" (so it matches the audio starting timestamp). > > Carl Eugen > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
