v4l2loopback [1] driver for testing) but I have a problem which I can't seem to find a solution. VLC [2] uses VIDIOC_CROPCAP [3] to detect the pixelaspect ratio of the input it receives from v4l2 device. But I can't seem to find a way to set struct v4l2_cropcap.pixelaspect ...
(), try_decode_video_frame(), update_context_from_thread(), v4l2_configure_contexts(), v4l2_get_framesize_compressed(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_init(), vdpau_mpeg4_start_frame(), vp6_decode_init(), vp78_decode_init(), and wma_decode_...