Created attachment 107173 [details] corrupted hardware decoded frame in bsg.mkv Using mpv=git built with ffmpeg=git linked to libva=1.4.0-1 in debian experimental (identical results with 1.3.1-3 in unstable). Using vaapi hardware decoding on Ivy Bridge and Sandy Bridge CPUs, some frames of vc1 streams are decoded with block-like artifacts. No such problems appear when decoding in software. The streams are remuxed directly from Blu-Ray without rencoding using makemkv. The problem appears intermittently on the order of one frame per 10 minutes of video. Which frames are corrupted is 100% reproducible. Rapid chaninges in luminance tend to trigger the problem. Sample clip 1:https://dl.dropboxusercontent.com/u/60598588/bsg.mkv Sample clip 2:https://dl.dropboxusercontent.com/u/60598588/ja.mkv
Created attachment 107174 [details] correctly software decoded frame from bsg.mkv
Created attachment 107175 [details] corrupted hardware decoded frame in ja.mkv
Created attachment 107176 [details] correctly software decoded frame from ja.mkv
Oops, sorry, this looks like a duplicate.
*** This bug has been marked as a duplicate of bug 68492 ***
Should add that the command for buggy hw decoding is mpv --no-config --hwdec=vaapi bsg.mkv and software decoding is mpv --no-config --hwdec=no bsg.mkv The above use opengl video output rendering, but the results are the same when adding --vo=vaapi for vaapi output rendering.
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