Bug 84552

Summary:	some vc1 frames decode corrupted "blocky"
Product:	libva	Reporter:	Kevin Mitchell <kevmitch>
Component:	intel	Assignee:	haihao <haihao.xiang>
Status:	RESOLVED DUPLICATE	QA Contact:	Sean V Kelley <seanvk>
Severity:	normal
Priority:	medium	CC:	kevmitch
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	corrupted hardware decoded frame in bsg.mkv correctly software decoded frame from bsg.mkv corrupted hardware decoded frame in ja.mkv correctly software decoded frame from ja.mkv

Description Kevin Mitchell 2014-10-01 11:39:14 UTC

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

Comment 1 Kevin Mitchell 2014-10-01 11:39:58 UTC

Created attachment 107174 [details]
correctly software decoded frame from bsg.mkv

Comment 2 Kevin Mitchell 2014-10-01 11:40:36 UTC

Created attachment 107175 [details]
corrupted hardware decoded frame in ja.mkv

Comment 3 Kevin Mitchell 2014-10-01 11:41:17 UTC

Created attachment 107176 [details]
correctly software decoded frame from ja.mkv

Comment 4 Kevin Mitchell 2014-10-01 15:57:57 UTC

Oops, sorry, this looks like a duplicate.

Comment 5 Kevin Mitchell 2014-10-01 15:58:39 UTC


*** This bug has been marked as a duplicate of bug 68492 ***

Comment 6 Kevin Mitchell 2014-10-01 16:10:30 UTC

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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