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Bug 531857 - Can't play WVC1 videos
Can't play WVC1 videos
Status: RESOLVED FIXED
Product: GStreamer
Classification: Platform
Component: gst-libav
git master
Other Linux
: Normal normal
: 0.10.4
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Blocks:
 
 
Reported: 2008-05-06 23:59 UTC by Bastien Nocera
Modified: 2008-05-07 09:48 UTC
See Also:
GNOME target: ---
GNOME version: ---


Description Bastien Nocera 2008-05-06 23:59:58 UTC 
gstreamer-plugins-ugly-0.10.7-1.lvn9
gstreamer-ffmpeg-0.10.3-3.lvn9

$ totem Test_1440x576_WVC1_6Mbps.wmv 
<snip>
** Message: don't know how to handle video/x-asf-unknown, fourcc=(fourcc)WVC1, format=(fourcc)WVC1, framerate=(fraction)25/1
** Message: Error: You do not have a decoder installed to handle this file. You might need to install the necessary plugins.
gstplaybasebin.c(2280): prepare_output (): /play
<snip>

Samples available at:
http://samples.mplayerhq.hu/V-codecs/WVC1/
Comment 1 Sebastian Dröge (slomo) 2008-05-07 06:16:07 UTC 
With latest CVS I get:


FlightSimX_720p60_51_15Mbps.wmv:

** Message: don't know how to handle audio/x-wma, wmaversion=(int)3, bitrate=(int)384000, depth=(int)24, rate=(int)48000, channels=(int)6, block_align=(int)16384, codec_data=(buffer)18003f0000000000000000000000e0000000



Test_1440x576_WVC1_6Mbps.wmv:

0:00:02.113567363 28450  0x8757c88 ERROR               ffmpeg :0:: Reserved RES_SM=2 is forbidden


In theory we should be able to play WVC1 videos with ffdec_vc1 I guess and afsdemux gives correct caps for the video for me:
/playbin0/decodebin0/asfdemux0.video_00: caps = video/x-wmv, wmvversion=(int)3, fourcc=(fourcc)WVC1, width=(int)1440, height=(int)576, codec_data=(buffer)250000010fdbbe2cf11f88800000010e10c4b3c47c80, pixel-aspect-ratio=(fraction)1/1, format=(fourcc)WVC1, framerate=(fraction)25/1


So there's two things to be done here IMHO:
a) ffmpeg needs wma3 support
b) ffmpeg needs to be fixed to correctly handle this particular WMV stream


Btw, mplayer plays those two files just fine but it uses win32 dll codecs to do this.
Comment 2 Edward Hervey 2008-05-07 09:48:42 UTC 
ffdec_wmv3 is being picked up instead of ffdec_vc1. Bumping the rank of _vc1 to MARGINAL+1 (slightly higher priority than ffdec_wmv3).

wma3 is another issue, please open another bug for that.

2008-05-07  Edward Hervey  <edward.hervey@collabora.co.uk>

	* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_setcaps),
	(gst_ffmpegdec_video_frame), (gst_ffmpegdec_register):
	Bump the priority of VC1 decoder so that it goes before the WMV3
	decoder. This allows proper auto-pluggin with decodebin/playbin.
	Fixes #531857