[Video at Xiph] codec quality test

[Tom Kent]

I don't think this is exactly what you're looking for, but I'll throw it
out anyway.

For a class that I teach on video editing, I wrote a program that presents
the output from different encoders (all currently in ffmpeg, but the code
could be hacked to use other command line encoders) to the user for manual
comparison.

Here's an example of the page comparing it all:
http://mediaintro.sagradocorazon.info/Video/Clips/SintelTrailer/sintel_constant_demo/sintel_clip_small.html

There's lossless png images of individual frame captures that you can
compare.  There is also a comparison tool which is a bit of javascript that
will cycle through a selection of the various frames, so you can visually
see the differences:
http://mediaintro.sagradocorazon.info/Video/Clips/SintelTrailer/sintel_constant_demo/sintel_clip_small_5s.html

Like I said this is more of a tool to demonstrate the differences in codecs
than to actually test their quality. Anyway, the source code is available
on github:
https://github.com/teeks99/codec-smash

Tom

On Sat, Oct 20, 2012 at 4:29 PM, Ran Shalit <ranshalit at gmail.com> wrote:

> Hello,
>
> Can anyone refer me to information of codec quality test, i.e. how to
> evaluate codec performance.
>
> Thanks,
> Ran
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> video at xiph.org
> http://lists.xiph.org/mailman/listinfo/video
>
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