[FFmpeg-devel] [PATCH] libavformat/flvdec: add HEVC demuxing support

[Hendrik Leppkes]

On Tue, Jul 27, 2021 at 5:50 AM Gyan Doshi <ffmpeg at gyani.pro> wrote:
>
>
>
> On 2021-07-26 22:51, Hendrik Leppkes wrote:
> > On Mon, Jul 26, 2021 at 5:16 PM Gyan Doshi <ffmpeg at gyani.pro> wrote:
> >>
> >>
> >> On 2021-07-26 19:49, Steven Liu wrote:
> >>> 在 2021年7月26日星期一，Gyan Doshi <ffmpeg at gyani.pro> 写道：
> >>>
> >>>> On 2021-07-26 16:39, Steven Liu wrote:
> >>>>
> >>>>> 2021年7月26日 下午6:57，Gyan Doshi <ffmpeg at gyani.pro> 写道：
> >>>>>> Are you referring to the choice of FLV_CODECID values?
> >>>>>>
> >>>>> Not only, you can find whole history on:
> >>>>>
> >>>>> https://lists.ffmpeg.org/pipermail/ffmpeg-devel/
> >>>>> https://trac.ffmpeg.org/ticket/6389
> >>>>> https://trac.ffmpeg.org/ticket/3581
> >>>>>
> >>>> try play this sample in ticket
> >>>> The objections mainly center on compliance with Adobe's spec which is a
> >>>> concern when muxing.
> >>>>
> >>>> no not only muxing, it’s format spec, and no documentation said which
> >>> codec id is hevc. 10?11?12?13?14?15? How do you make sure which one is hevc
> >>> from users flv? This is very unreasonable.
> >> By making it a user option: ffmpeg -f flv -hevc_id 12 -i rtmp://...
> >>
> >>
> > Which just screams ugly hack even more then anything else.
>
> Of course. The format is alive but the publisher has abandoned it, so
> hacks are all that is left.
>

That doesn't mean we have to endorse those hacks.

HEVC in FLV, and a few other codecs, have been brought up numerous
times. You can find all the arguments in the ML archives. Just posting
yet-another-patch is not going to change those arguments or the
reasons to not apply such a patch.

- Hendrik