[theora] bitstream test suite

Silvia Pfeiffer silviapfeiffer1 at gmail.com
Wed Jan 27 14:49:27 PST 2010

Hi dos386,

this is an open community and you're very welcome to contribute
further test material / provide improved material from existing test
material. That wiki page has just recently been created to start a
good collection and prepare for an automated test suite.

BTW: there are further test files for transcoding at media.xiph.org.


On Wed, Jan 27, 2010 at 11:59 PM, dos386 <dos386 at gmail.com> wrote:
> Highly appreciated, there is some space for improvements, though:
> - 2 important movies are missing IMHO
> - Some movies are unnecessarily absurdly huge (both bloat in Byte's as
> well as screen size in pixels). IMHO such test movies (except of
> course you want to test super-HD compliance) should be < 2 MiB and cca
> 300x200 to 600x400 pixels. Huge movies unnecessarily disturb tests by
> possible lack of CPU performance to decode or screen space to display
> them.
> - The "offset" movie is "frozen" ... deliberate ??? Most players I
> tested so far fail the test anyway :-( A movie should show something
> moving, otherwise you can't find out whether it plays or is just
> frozen (I have trouble with Opera 10.5 here ...)
> - The "320x240" movies show stripes looking broken (how is it supposed
> to look like ???) and B&W noise. Maybe some other scene would be
> better.
> - The movies should have a reasonable "fps" value (10 to 50 fps,
> except you want to test for funny values here), and a reasonable time
> (5 to 20 seconds). < 5 s is bad because 1. some players tend to "steal
> seconds" 2. some players do screen switches and a recovery from such a
> switch can take up to 3 s
> - There should be some description what the movie is supposed to show,
> and possibly a shot (or one good and one or multiple evil), for all
> movies, not only the "offset" test.
> --
> ~~~ wow ~~~
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