[Ffmpeg-devel] mpc7 bad quality?

[Baptiste Coudurier]

Hi

Kostya wrote:
> On Sun, Mar 04, 2007 at 11:04:15AM +0100, Guillaume POIRIER wrote:
>> Hi,
>>
>> On 3/4/07, Kostya <kostya.shishkov at gmail.com> wrote:
>>> On Sun, Mar 04, 2007 at 12:35:07AM -0500, Ronald S. Bultje wrote:
>>>> Hi,
>>>>
>>>> I'm trying to play a musepack sample, and noticed that it has incredibly
>>>> bad quality (lots of noise) compared to the libmusepack decoder that
>>>> e.g. Xine has. Is this a known problem?
>>>>
>>>> A sample file is available on
>>>> http://gstreamer.freedesktop.org/media/medium/kantate.mpc
>>>>
>>>> Ronald
>>> On my PPC:
>>> kantate1.wav created by sample decoder from libmpcdec-1.2.1
>>> kantate2.wav was created by FFmpeg
>>>
>>> ./tiny_psnr kantate2.wav kantate1.wav 2 1924 44
>>> stddev:  0.70 PSNR:99.34 bytes:50485248
>>>
>>> Can somebody verify this on x86?
>> sure, juste gimme both commandlines and I'll do it.
>>
>> Guillaume
> 
> first one: mppdec kantate.mpc kantate1.wav
> second   : ffmpeg -i kantate.mpc kantate2.wav
> 
> tiny_psnr was compiled from ffmpeg/tests 

./tiny_psnr ~/samples/kantate2.wav ~/samples/kantate1.wav 2 1924 44

stddev:  0.70 PSNR:99.35 bytes:50485248

I used mpc123 on debian x86 to decode.
Something strange or not:
ffmpeg -i kantate2.wav -f s16le -acodec copy kantate2.pcm

50485680 2007-03-04 14:10 kantate1.pcm
50489856 2007-03-04 14:10 kantate2.pcm

-- 
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