On Mon, Jan 2, 2017 at 9:37 AM, Philip Langdale <phil...@overt.org> wrote: > On Mon, 2 Jan 2017 00:56:18 -0700 > Pavel Koshevoy <pkoshe...@gmail.com> wrote:
>> Perhaps a more comprehensive solution is needed. I've run into the >> same problem again (avcodec_open2 succeeds, decoding spits errors) >> when I tried to play back an mpeg2 stream with YUV422P pixel format. >> >> I have a new patch but I'd like to test it on a Pascal GPU first. I >> am still hoping that 422 decoding will work. It looks like it should >> be supported, but I've observed on Geforce GT 730 that even though I >> can instantiate a cuvid decoder with cudaVideoChromaFormat_422 without >> error -- the decoded video is garbage everywhere except for 16-pixel >> wide column along the left edge of the frame. >> >> In ee88dcb2 cuvid_handle_video_sequence was hard-coded to error-out if >> the chroma format is not 420. This looks like an NVIDIA driver/cuvid >> bug... does anyone know how to bring it to their attention? > > It is documented as only supporting 420, even though it doesn't return > an error, so it's not a bug per-se - it's just that they don't detect > and return an error, so we do it ourselves. > > --phil I don't recall seeing it mentioned that they do not support 422 and 444 in nvidia docs, but I haven't looked very hard yet. I find it odd that they have enum values to represent these chroma formats, yet they don't work... I'll see if I can file a bug with nvidia about this, tomorrow. I'll send another patch in about an hour to address the original problem that got me looking in cuvid.c. Pavel. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel