On 22/05/2024 18:17, Philip Langdale via ffmpeg-devel wrote:
On Wed, 22 May 2024 11:10:31 -0400 "Ronald S. Bultje" <rsbul...@gmail.com> wrote:Hi, On Wed, May 22, 2024 at 10:36 AM Hendrik Leppkes <h.lepp...@gmail.com> wrote:On Thu, Feb 29, 2024 at 7:19 AM llyyr <ll...@yukari.in> wrote:segmentation.update_map is never reset to 0 on a new frame, and retains the value from the previous frame. This bugs out a bunch of hwaccel drivers when segmentation.enabled is 0 but update_map isn't because they don't ignore values behind switches. We also do this for vp8* so this commit is just mirroring the vp8 logic. This fixes an issue with certain samples** that causes blocky artifacts with vaapi and d3d11va (as far as known hwaccel drivers go). Mesa worked around*** this by ignoring this field if segmentation.enabled is 0, but d3d11va still doesn't work. *https://git.ffmpeg.org/gitweb/ffmpeg.git/blob/HEAD:/libavcodec/vp8.c#l811** https://github.com/mpv-player/mpv/issues/13533 *** https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27816 Signed-off-by: llyyr <ll...@yukari.in> --- libavcodec/vp9.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/vp9.c b/libavcodec/vp9.c index 855936cdc1c7..4a628625131e 100644 --- a/libavcodec/vp9.c +++ b/libavcodec/vp9.c @@ -717,6 +717,8 @@ static int decode_frame_header(AVCodecContext *avctx, s->s.h.segmentation.feat[i].skip_enabled =get_bits1(&s->gb);} } + } else { + s->s.h.segmentation.update_map = 0; } // set qmul[] based on Y/UV, AC/DC and segmentation Q idx deltas base-commit: d263fce2b209e86a5a1e8f1b6aa33430ecc2c187 --Change LGTM. I was debugging the same issue today, and found the same problem with some hwaccels not properly ignoring update_map when segmentation is disabled. Will apply soon if there are no further comments.Is fine, please apply.Another LGTM. We've been seeing this reported on the mpv side as well. --phil _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Can't this get fixed by hwaccel code rather than globally?I'd hate to apply fixes with no information in shared code. This can get removed with no information about what relies on it.
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