Abnormally slow transcoding times for vpx in ffmpeg-0.6 with vpx-0.9.1

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When transcoding to vpx I am seeing very slow transcoding times (anywhere from 
1x to 4x the run-length of the video). All other formats seem to transcode at a 
much faster rate. Using webm with a different codec works at a normal pace, so 
the issue seems to be codec specific.

I tested this issue with ffmpeg-0.6 on OSX 10.6.3 using vpx-0.9.1 and the 
associated patch for ffmpeg and vpx from the downloads section. I also 
attempted it without the patch. In both instances, the transcode time was 
abysmally slow.

I received these results with all of the following command lines:

ffmpeg -i <input.mov> <output.webm>
ffmpeg -i <input.mov> -r 15 <output.webm>
ffmpeg -i <input.mov> -s 320x240 <output.webm>
ffmpeg -i <input.mov> -b 6k <output.webm>
ffmpeg -i <input.mov> -vcodec libvpx <output.mkv>

It also occurred with any combination of those options.

Original issue reported on code.google.com by johngund...@gmail.com on 29 Jul 2010 at 5:51

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Original comment by iss...@webmproject.org on 16 Mar 2011 at 2:51

[GoogleCodeExporter]

There has been significant encoder speed improvement since the issue was 
reported. Need re-test to verify the validity of the issue. 

Original comment by ya...@google.com on 17 Mar 2011 at 6:30

• Changed state: WontFix
• Added labels: Priority-Low, Type-Enhancement
• Removed labels: Priority-Medium, Type-Defect