[Ffmpeg-devel] Problem using ffmpeg with v4l

Erik Slagter erik
Sun Jan 8 12:33:51 CET 2006

On Fri, 2006-01-06 at 17:08 -0200, Flavio Pimentel Duarte wrote:
> We've track down the problem to the grab.c in libavformat directory. It 
> seems that the call in line 138
> ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);
> is failing. Changing it to a simple "ret = -1" make everything work fine.
>  	I still wondering if I am doing something wrong or if it is really 
> a bug. Anyway it would be very good if this issue was fixed.

Probably your webcam does not support the import format ffmpeg expects.

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