[FFmpeg-devel] [PATCH 1/2] avcodec/s302m: enable non-PCM decoding

[Kieran Kunhya]

On Tue, 23 Jan 2024 at 08:33, Gyan Doshi <ffmpeg at gyani.pro> wrote:

>
>
> On 2024-01-23 01:26 pm, Kieran Kunhya wrote:
> > On Tue, 23 Jan 2024 at 06:50, Gyan Doshi <ffmpeg at gyani.pro> wrote:
> >
> >> Set up framework for non-PCM decoding in-place and
> >> add support for Dolby-E decoding.
> >>
> >> Useful for direct transcoding of non-PCM audio in live inputs.
> >>
> > Does this handle a Dolby E packet spanning multiple S302M packets? I'm
> not
> > saying you should support this as it's rare and very annoying to
> implement
> > but it does happen.
>
> No, this does not handle spanned payload.
> I have access to a sample where it looks like the packetizer got
> mis-aligned and I think
> cases like those are better handled by a parser.
>
> Adding support for multiple payload packets in one 302m packet is on my
> to-do although
> the parser is better suited for that as well as the last payload packet
> might be fragmented.
>
> Regards,
> Gyan
>

Yes, and the other uncertainty is that the PTS must be cotimed with the
video so you have to guess whether it's the previous PTS or the next one.

Kieran