Bug 54797 - [IVB] VC1 ES streaming video cannot be played with gstreamer for Could not determine type of stream
Summary: [IVB] VC1 ES streaming video cannot be played with gstreamer for Could not de...
Status: RESOLVED WONTFIX
Alias: None
Product: libva
Classification: Unclassified
Component: intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Wind Yuan
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-09-12 03:00 UTC by cc
Modified: 2013-01-24 10:36 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
typefind: detect VC-1 elementary streams (4.88 KB, patch)
2013-01-24 10:36 UTC, Gwenole Beauchesne 		Details | Splinter Review
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Description cc 2012-09-12 03:00:03 UTC 
Environment:
--------------
libva:
commit 0a29a454b0569073f64d0af5bf7a4324e7295c86
Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Date:   Sat Apr 7 07:15:07 2012 +0200

intel-driver:
commit f842b5021acbf093572a1bd0f86d32ff3e08621e
Author: Zhao Halley <halley.zhao@intel.com>
Date:   Thu Aug 2 12:28:48 2012 +0300

gstreamer-vaapi :
commit de2a18012dca67d9e581219e94616a63866db821
Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Date:   Tue Sep 4 11:53:18 2012 +0200

Bug Info:
--------------
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstTypeFindElement:typefind: Could not determine type of stream.
Additional debug info:
gsttypefindelement.c(996): gst_type_find_element_activate (): /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstTypeFindElement:typefind
Setting pipeline to NULL ...
Freeing pipeline ...

Reproduce steps:
----------------
1. xinit &
2. gst-launch-0.10 playbin2 uri=file:///home/VC1_conformance/bitstreams/SA10097.vc1
Comment 1 Gwenole Beauchesne 2013-01-23 17:12:32 UTC 
The vc1parse element is an addition to the upcoming GStreamer 1.2.0 (gst-plugins-bad). playbin2 cannot detect raw VC-1 bitstreams without it.

Meanwhile, you need to build an explicit pipeline as follows:
$ gst-launch filesrc location=/Videos/vc1/conformance/SA10097.vc1 ! video/x-wmv,format=\(fourcc\)WVC1,width=540,height=480 ! vaapidecode ! vaapisink

You can change the framerate by appending ,framerate=12/1 for example to display at 12 fps.

Another option is to use `simple-decoder' from the git master branch:
$ ./tests/simple-decoder /Videos/vc1/conformance/SA10097.vc1 -c vc1
though, this is very primitive.
Comment 2 Wind Yuan 2013-01-24 05:27:08 UTC 
From Gwenole's comments, marked as won't fix since there's no vc1 parser in gst-plugins-bad currently.
Comment 3 Gwenole Beauchesne 2013-01-24 10:36:06 UTC 
Created attachment 73556 [details] [review]
typefind: detect VC-1 elementary streams

Here is a patch to gst-plugins-base 0.10. It helps, but it's not perfect without the vc1parse element. At least, most conformance tests would run with playbin2. Don't expect all of them to go through though.

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