[FFmpeg-user] Webcam capture

[Paul B Mahol]

On 7/20/20, Rodolfo Medina <rodolfo.medina at gmail.com> wrote:
> Hi all.
>
> When capturing video from webcam, with:
>
>  $ ffmpeg -f video4linux2 -s 3200x2400 -i /dev/video0 -vb 20M out.mpg

3200x2400  is very big resolution

>
> , out.mpg stops, freezes, gets stuck at the beginning for a few seconds.
> Only
> at the beginning and only for a few seconds.  I thought the problem was
> related
> to the cheap low-quality webcam but it completely disappears when I do
> instead:
>
>  $ mencoder tv:// -tv
> driver=v4l2:width=640:height=480:device=/dev/video0:forceaudio:alsa:adevice=hw.1,0
> -ovc lavc -oac mp3lame -lameopts cbr:br=64:mode=3 -o webcam.avi
>
> So what could the cause be of the problem with ffmpeg?
>
> Thanks for any help.
>
> Rodolfo
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