get_format

enum AVPixelFormat get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt)
{
    int result = av_videotoolbox_default_init(s);

    AVVideotoolboxContext * videoToolboxContext = av_videotoolbox_alloc_context();
    result = av_videotoolbox_default_init2(s, videoToolboxContext);

    if (result != 0) {
        NSLog(@"Failed to init video toolbox");
    }

    return *fmt;
}