Bug 68492

Summary:	[IVB/BYT/BSW] Macroblocking artifact seen on a VC1 video file
Product:	libva	Reporter:	sameer.kibey
Component:	intel	Assignee:	Focus.Luo <focus.luo>
Status:	REOPENED ---	QA Contact:	Sean V Kelley <seanvk>
Severity:	major
Priority:	medium	CC:	kevmitch, megaup987, sameer.kibey
Version:	unspecified
Hardware:	All
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description sameer.kibey 2013-08-23 23:01:04 UTC

Macroblocking artifacts seen during playback of a WMV file with VC1 video using vaapi-decode. The macroblocks can be seen in the first 3-4 seconds of the clip. Also artifacts are more prominent around 02:31 timestamp in the playback.

Instructions to reproduce:

File: 
http://download.microsoft.com/download/9/b/4/9b4535e2-f908-4785-97a5-ef360405e391/Elephant%27s%20Dream%20720p%202M.wmv

Playback command:
gst-launch-0.10 filesrc location=elephant_dream.wmv ! asfdemux ! vaapidecode ! queue ! vaapisink

Platform: 
reproduced on Ivybridge 64-bit and Baytrail-M 32-bit with 13.10 Ubuntu and 3.11 kernel.

Comment 1 sameer.kibey 2013-08-23 23:03:05 UTC

These macroblocking artifacts are not seen when playing the same file with software codec, or with windows media player on Windows.

Comment 2 Kevin Mitchell 2014-10-01 15:58:39 UTC

*** Bug 84552 has been marked as a duplicate of this bug. ***

Comment 3 haihao 2015-11-23 14:28:31 UTC

We fixed some VC1 related issues this year. Could you try the latest driver if you still experience this issue ?

Comment 4 Kevin Mitchell 2016-01-12 04:48:16 UTC

Problem persists unchanged for me with libva and intel-driver git master.

Comment 5 megaup987 2016-02-05 20:04:27 UTC

Gentlemen,

Seems like I'm having the same problem on ASRock Beebox Intel Celeron N3000. The file is coded VC-1, 1080p24. When I play the file with VAAPI enabled, I get the square artifacts on the screen. I experienced this problem with vaapi intel-driver 1.6.1 and 1.6.2. If VAAPI is disabled, the problem disappears, but the CPU load is too much.

You may get the file here: https://docs.google.com/uc?id=0B9X316MN6HHvSlNWb1ZhSGo2X2M&export=download (Second 3 till the end).

Reproduced on Braswell 64-bit, with OpenELEC 6.0.0, Linux Mint 17, kernel 4.3.3, vaapi intel-driver 1.6.1 and 1.6.2.

Comment 6 haihao 2016-12-07 02:50:26 UTC

Hi Focus,

Can you reproduce this issue on SKL or KBL? 

Thanks
Haihao

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