[FFmpeg-user] How to properly record sound when capturing web cam?

Carl Eugen Hoyos ceffmpeg at gmail.com
Tue May 1 19:01:44 EEST 2018

2018-05-01 13:52 GMT+02:00, Jean Louis <ffmpeg at rcdrun.com>:

> Input #0, video4linux2,v4l2, from '/dev/video0':
>   Duration: N/A, start: 453144.187672

> Input #1, alsa, from 'default':
>   Duration: N/A, start: 1525175436.738077

Sorry, I missed this.
A/V sync is impossible with these start times.
Try the v4l2 timestamps options to get similar
start times:
$ ffmpeg -timestamps abs -video_size 320x240 -i /dev/video0

Carl Eugen

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