[FFmpeg-user] How to open avfoundation via C

[Carl Eugen Hoyos]

2018-10-09 1:03 GMT+02:00, Jeroen Ooms <jeroenooms at gmail.com>:
> I would like to capture the screen in MacOS. This works via the command
> line:
>
>   Command line: ffmpeg -f avfoundation -i "1" -pix_fmt yuv420p -r 25
> -t 5 out.mov
>
> However I can't figure out how to do this in C. I tried the following,
> but it gives an error "Device selection unsupported.".
>
>   AVBufferRef *capture;
>   AVDictionary *opts = NULL;
>   av_dict_set(&opts, "video_device_index", "1", 0);
>   av_dict_set(&opts, "audio_device_index", "none", 0);
>   av_hwdevice_ctx_create(&capture, AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
>                                  "avfoundation", opts, 0);

>From the command line above, avfoundation
is a device / format, not a hwdevice.

Carl Eugen