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

[Vitor Sessak]

On 07/16/2010 04:03 PM, Ronald S. Bultje wrote:
> Hi,
>
> On Fri, Jul 16, 2010 at 4:57 AM, Vitor Sessak<vitor1001 at gmail.com>  wrote:
>> On 07/16/2010 12:18 AM, Ronald S. Bultje wrote:
>>> 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
>
> I wonder if the vocoder experts can guess with me on whether we can
> create a "bitexact" version that does not have this problem.

See the thread "Instability in AMR-NB" in ffmpeg-soc ML, it might be the 
same problem here.

-Vitor