Last modified: 2009-10-07 20:54:26 UTC
The current version of ffmpeg used on wikimedia servers seems to mangle the thumbnail generation of videos encoded with the latest theora encoder. (included with firefogg) I have not confirmed but I believe a more recent version of ffmpeg solves this problem. An alternative would be to use a xiph based tool to abstract the thumbnail. the sample image: http://commons.wikimedia.org/wiki/File:Test_ffmpeg_image.ogv
Reassigning to Fred for software update.
More test cases: http://commons.wikimedia.org/wiki/Image:Announcement_Nobelprize_PhysMed_2009-1.ogv http://commons.wikimedia.org/wiki/Image:Announcement_Nobelprize_PhysMed_2009-2.ogv in the #theora channel I was told that old versions of ffmpeg do not fully implement the theora 1.0 standard, and that the 1.1 encoder uses unimplemented features. Please update.
We added support for oggThumb for thumbnail generation r57439. This supports theora 1.1 encoder. The example files should work now.