https://bugzilla.wikimedia.org/show_bug.cgi?id=63534
Bug ID: 63534
Summary: Updated Theora encoder could create nicer looking
transcodes
Product: Wikimedia
Version: wmf-deployment
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: General/Unknown
Assignee: [email protected]
Reporter: [email protected]
Web browser: ---
Mobile Platform: ---
The video transcoding infrastructure creates Theora versions of uploaded videos
in various resolutions and bitrates. Currently version 0.27 of the
ffmpeg2theora transcoding tool is used which uses the Theora 1.1 encoder.
Current versions of ffmpeg2theora (0.29) usually include the Theora 1.2 encoder
(e.g., http://v2v.cc/~j/ffmpeg2theora/ffmpeg2theora-0.29.linux64.bin). This
often creates much nicer looking videos.
Example:
Original File:
https://commons.wikimedia.org/wiki/File%3ALutra_lutra_grooming.ogv
Wikipedia 360p transcode created ffmpeg2theora 0.27 and Theora 1.1:
http://maikmerten.de/theora-test/Lutra_lutra_grooming.ogv.360p.ogv
360p transcode with ffmpeg2theora 0.29 and Theora 1.2:
http://maikmerten.de/theora-test/Lutra_lutra_grooming.ogv.ogv
The change is quite noticeable on the water.
The updated ffmpeg2theora version expects the same commandline arguments and
should be a drop-in replacement.
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