[FFmpeg-devel] [PATCH] avcodec: Switch bitrate to 64bit with the bump

Ronald S. Bultje rsbultje at gmail.com
Wed Sep 2 22:49:41 CEST 2015


On Wed, Sep 2, 2015 at 4:47 PM, Ganesh Ajjanagadde <gajjanag at mit.edu> wrote:

> On Wed, Sep 2, 2015 at 1:20 PM, Michael Niedermayer <michaelni at gmx.at>
> wrote:
> > From: Michael Niedermayer <michael at niedermayer.cc>
> >
> > a 32bit bitrate is insufficient for high resolution, high framerate
> material
> > an example would be rawvideo
> >
> > Not all changes are covered by #if as its easier to just push when the
> > bump is done instead of making it coditional and removig the
> conditionallity
> >  again
> Not for this patch; but just a thought - I noticed in swresample the
> use of int for sample rate. Note that all the C spec guarantees is int
> >= 16 bits, and 2^15 < 33000 which is insufficient for a lot of audio.
> Your comment above seems to reflect the assumption that int >= 32
> bits. Maybe this assumption is made elsewhere in the codebase as well,
> but it is not safe as per the standard. Thus, I feel swresample rate
> should be an int32_t; and there may be more opportunities for cleanup
> elsewhere.

FFmpeg assumes int >= 32bit. We don't support platforms where this
assumption doesn't hold.


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