On Sun, Feb 22, 2015 at 09:42:40 +0200, Vlăduţ Frăţiman wrote: > ffmpeg -y -f v4l2 -s 640x360 -framerate 5 -i /dev/video0 -f alsa -ac 1 -i > default:CARD=HD3000 -pix_fmt yuv420p -c:v libx264 -q:v 20 -r 5 -preset > ultrafast -strict -2 -c:a aac capture.mkv
I believe "-s" should be "-video_size". I believe "-q:v" has no effect on libx264, but I may be wrong. That said: > The main problem is that audio and video are totally out of sync. > Probably each device (video and audio) will not start simultaneously. > Is there any parameter to ensure that the two devices are ready > simultaneously so when recording, video and audio will be in sync? > In my case, audio start much faster. At begining video is freezing and > hear audio, then both play obviously out of sync and then audio is > finishing and video still playing until finish. Please show us the complete console output from the ffmpeg command. Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
