[FFmpeg-devel] [PATCH] convert to S16 when resampling is requested

Baptiste Coudurier baptiste.coudurier
Fri Jan 30 23:51:01 CET 2009

Michael Niedermayer wrote:
> On Fri, Jan 30, 2009 at 12:17:02PM -0800, Baptiste Coudurier wrote:
>> Hi Michael,
>> Michael Niedermayer wrote:
>>> On Sat, Dec 13, 2008 at 03:53:15PM -0800, Baptiste Coudurier wrote:
>>>> Hi Michael,
>>>> Michael Niedermayer wrote:
>>>>> On Fri, Dec 12, 2008 at 12:03:17PM -0800, Baptiste Coudurier
>>>>> wrote:
>>>>>> Hi,
>>>>>> $subject.
>>>>> I think the audio resampler should support all input & output
>>>>> sample formats instead. This would be similar to swscale and
>>>>> would be much easier to use for applications than having these
>>>>> steps seperated
>>>> Well, yes, however you suggested that 3 months ago and nobody
>>>> jumped in to work on it. In the mean time, there is still a big
>>>> regression in FFmpeg, and I don't see anything fixed in the near
>>>> future, so this workaround is IMHO acceptable until the most
>>>> elegant solution is implemented.
>>> what about moving your solution into the resampler?
>>> I mean, so that one can later replace the X->S16->Y code by something
>>>  better without having to change the API/ABI
>> I just looked at it and API does not provide a way to specify input
>> sample format, so we cannot do this without changing it.
> Indeed

So what do you want to do ? Can we still apply the patch on ffmpeg.c ?

>> Btw, is there something special to deal with when resampling > 2
>> channels ? 
> nothing i could think of ATM
>> Why isn't it supported exactly ?
> probably because the old resampler didnt support it and i was to lazy
> to fix something, i dont remember exactly

Ah ok :>

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