Hi,
Ray Lopez wrote:
[...]
> av_register_all();
>
> iformat = av_find_input_format("x11grab");
>
> if (!iformat)
> {
> fprintf(stderr, "Unknown input format: X11grab\n");
> // return -1;
> }
>
> // Open video file
> if(av_open_input_file(&ifc, filename, iformat, 0, NULL)!=0)
> {
> fprintf(stderr, "Couldn't open file\n");
> return -1; // Couldn't open file
> }
>
>
> This fails because it is not a known input format.
If av_find_input_format() is failing, I think there are two
possibilities:
1) You compiled ffmpeg without x11grab support, or
2) You forgot to call avdevice_register_all()
Also note that you should correctly set filename, otherwise
av_open_input_file() will fail.
Luca
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