[FFmpeg-user] ffmpeg slowly get out of sync

[Luo Xin]

Hi Carl,

This problem was solved, the root cause is big difference between audio 
and video start time, thanks for your help.

BR,
Xin Luo

On 2016年11月16日 20:08, Carl Eugen Hoyos wrote:
> 2016-11-16 12:59 GMT+01:00 Luo Xin <luoxin123 at sina.com>:
>
>> - output hls segments
> Don't you agree that the issue would be easier to reproduce
> with file output?
>
>> ffmpeg version n3.1.3-1-gea9ca2f Copyright (c) 2000-2016 the FFmpeg
> Note that this is old and unsupported.
> On this mailing list, only current FFmpeg git head is supported,
> I suspect there are Ubuntu support resources.
>
>> Input #0, alsa, from 'hw:3':
>>    Duration: N/A, start: 1479202954.916662
>> Input #1, video4linux2,v4l2, from '/dev/video2':
>>    Duration: N/A, start: 31.451263
> This cannot work, the start times have to be similar.
> Try -timestamps abs (or mono2abs) for the v4l2 input.
>
> And please remove "-r 25" from your command line,
> it does not do what you want, there is a "-framerate"
> option for v4l2 input.
>
> Carl Eugen
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