[FFmpeg-devel] FFmpeg's HLS muxer's deprecation of the hls_wrap option

[Steven Liu]

Dennis Mungai <dmngaie at gmail.com>于2024年1月20日 周六23:15写道：

> On Sat, 20 Jan 2024, 6:09 pm Steven Liu, <lingjiujianke at gmail.com> wrote:
>
> > Dennis Mungai <dmngaie at gmail.com>于2024年1月20日 周六21:02写道：
> >
> > > Hello,
> > >
> > > Is there a valid technical reason as to why FFmpeg's HLS muxer dropped
> > the
> > > hls_wrap option?
> >
> >
> > eg. three player playing the list and every fragment less or equal 1
> second
> > ,
> > 1. Player 1 from fragment1, fragment2
> > 2. Now Player 2 from fragment 1, fragment 2,
> > 3. Now Player 3 from fragment 1, Fragment2 and Player 1 playing fragment
> 3
> > 4. Network transport with player 3 get loss packet
> > 5. Player 1 playing new fragment 1, new fragment 2
> > 6. Player 2 playing fragment 3
> > 7. Player 3 blocking always because the fragments are flashing too fast.
> >
> > So the commit message said it is not friendly to downstream users.
> >
> > I have no more better way to fix it with ffmpeg, but I think that commit
> > can be revert if you want use hls_wrap.
> >
> >
> > > There are many cases where the hls_wrap option remains critical so as
> to
> > > preserve the set of output file names without increments. This
> > deprecation
> > > breaks that.
> > >
> > > For now, this behavior can be worked around by switching to the segment
> > > muxer and then setting the -segment_wrap option therein, but its' not
> an
> > > ideal solution.
> > >
> > > Kindly review this deprecation, with an appeal to revert the patchwork
> > that
> > > removed the hls_wrap option.
> > >
> > > Warm regards,
> > >
> > > Dennis.
> >
>
> Steven,
>
> The option should've been left intact, *but* with a warning on its
> implications on usage.

Dennis,

agreed with you, let me think about that.

> Multiple ffmpeg flags have similar edge case impacts
> when used improperly, eg -copyts and non monotonous timestamps, but they're
> not deprecated; they're still in place.
>
> >


Thanks
Steven

>
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