[FFmpeg-devel] Call for "make fate2" tests

[Vitor Sessak]

On 07/16/2010 12:36 PM, M?ns Rullg?rd wrote:
> Vitor Sessak<vitor1001 at gmail.com>  writes:
>
>> On 07/16/2010 12:18 AM, Ronald S. Bultje wrote:
>>> Hi,
>>>
>>> On Thu, Jul 15, 2010 at 5:59 PM, Vitor Sessak<vitor1001 at gmail.com>   wrote:
>>>> On 07/15/2010 11:28 PM, Ronald S. Bultje wrote:
>>>>> On Thu, Jul 15, 2010 at 5:19 PM, Vitor Sessak<vitor1001 at gmail.com>     wrote:
>>>>>>
>>>>>> There are a few formats that could use some tests for "make fate2". Could
>>>>>> the maintainers send a patch or at least suggest one or more files to
>>>>>> test?
>>>>>
>>>>> WMAVoice!!!
>>>>
>>>> Ok course, how could I forgot it?! Can you send a sample/patch?
>>>
>>> http://samples.mplayerhq.hu/A-codecs/WMSP/
>>>
>>> I used the streaming_CBR-{7,11,19}K.wma, together they pretty much
>>> expose all features of the decoder.
>>
>> Unfortunately, wmavoice has the same problem of AMR: the
>> floating-point errors add up, making the output across arches vary
>> considerably. Comparing my core duo with Mans' ppc box:
>>
>> stddev:    0.16 PSNR:111.87 MAXDIFF:   10 bytes:   264014/   264014
>> stddev:    1.12 PSNR: 95.34 MAXDIFF:   58 bytes:   264014/   264014
>> stddev:    2.50 PSNR: 88.36 MAXDIFF:   98 bytes:   527906/   527906
>
> Is the output actually correct in any sense of the word?  How are the
> psnr values?

stddev ~ 1-2 is very close (most likely a completely inaudible 
difference), even more some for a vocoder.

-Vitor