[FFmpeg-devel] [PATCH] QCELP postfilter
Ronald S. Bultje
Tue Apr 13 19:59:49 CEST 2010
On Tue, Apr 13, 2010 at 12:59 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Tue, Apr 13, 2010 at 12:51:26PM -0400, Ronald S. Bultje wrote:
>> On Tue, Apr 13, 2010 at 12:45 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
>> > the flac is 2channel 44khz, the others are 1channel 8khz
>> Well of course, voice codecs are always 8kHz (or around there). The
>> Qualcomm software converted it (without asking me).
> but that means we have no reference again
> i can surely downconvert it to 8khz but thats not what was encoded...
I see that's sub-ideal, but I don't know how to fix it. The Qualcomm
encoder does all of this in one single step ("convert", which converts
to 8kHz, 1 channel, QCELP from any WAVE file)...
Maybe I should try Quicktime Pro instead? But then again, what are we
trying to show here? Do we really need the intermediate resampled
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