[FFmpeg-devel] ALAC regression test

Vitor Sessak vitor1001
Mon Jan 5 22:37:36 CET 2009

M?ns Rullg?rd wrote:
> Mike Melanson <mike at multimedia.cx> writes:
>> Jai Menon wrote:
>>> Mike : In that case could you verify if this works on the test machines?
>>> It should work, but I tested this on a win32 machine using mingw and
>>> that makes me a bit unsure.
>> I did a quick test just with Mac OS X/x86_64 and the result differed 
>> from your patch. I will try to get it tested on the larger FATE network 
>> and find patterns some patterns with how it works.
>> Is it supposed to produce an identical encode on multiple platforms?

My guess is that it is not binary identical because of floating point 
rounding differences in libavcodec/lpc.{c,h}.

> Is it still lossless, that is, does only the encoded file differ?

If my guess is correct, it should be.


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