[FFmpeg-devel] screen flicker when reduce desired_video_buffers in ffmpeg

Soho Soho123 soho123.2012 at gmail.com
Tue Jun 14 15:23:08 CEST 2011


we found the error from
kernel UVC driver:
USB isochronous frame lost (-71).
Any idea about the error when we reduce the buffer
(desired_video_buffers) count?

Best Regards,

2011/6/14 Soho Soho123 <soho123.2012 at gmail.com>:
> dears :
> We use ffserver as stream server, and use ffmpeg to grap data from uvc
> cam. ffmpeg option is list below.
> ffmpeg -f video4linux2 -vcodec mjpeg -r 30 -s 640x480 -i /dev/video0
> -r 30 -vcodec copy http://localhost:8090/feed1.ffm
> when we usc VLC the receive stream data (MJPEG stream), and
> if desired_video_buffers is set to 12, then screen on VLC is flicker
> very serious. Because memory issue, we should to reduce the value of
> desired_video_buffers.
> Does any one have any idea?
> Thanks!
> best Regards,
> Soho

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