Re: [FFmpeg-devel] [PATCH] avformat/hls: Revert "reduce default max reload to 3"

[Soft Works <softworkz-at-hotmail.com@ffmpeg.org>]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of
> Michael Niedermayer
> Sent: Mittwoch, 26. Februar 2025 01:39
> To: FFmpeg development discussions and patches <ffmpeg-
> devel@ffmpeg.org>
> Subject: Re: [FFmpeg-devel] [PATCH] avformat/hls: Revert "reduce default
> max reload to 3"
> 
> Hi
> 
> On Fri, Feb 07, 2025 at 02:39:56AM +0000, Soft Works wrote:
> >
> >
> > > -----Original Message-----
> > > From: Steven Liu <lingjiujianke@gmail.com>
> > > Sent: Friday, February 7, 2025 3:24 AM
> > > To: FFmpeg development discussions and patches <ffmpeg-
> > > devel@ffmpeg.org>
> > > Cc: softworkz <softworkz@hotmail.com>
> > > Subject: Re: [FFmpeg-devel] [PATCH] avformat/hls: Revert "reduce
> > > default max reload to 3"
> > >
> > > softworkz <ffmpegagent@gmail.com> 于2025年1月19日周日 16:52写道
> ：
> > > >
> > > > From: softworkz <softworkz@hotmail.com>
> > > >
> > > > This change has caused regressions for many users and consumers.
> > > > Playlist reloads only happen when a playlist doesn't indicate that
> > > it
> > > > has ended (via #EXT-X-ENDLIST), which means that the addition of
> > > future
> > > > segments is still expected.
> > > > It is well possible that an HLS server is temporarily unable to
> > > serve
> > > > further segments but resumes after some time, either indicating a
> > > > discontinuity or even by fully catching up.
> > > > With a segment length of 3s, a max_reload value of 1000 corresponds
> > > to
> > > > a duration of 50 minutes which appears to be a reasonable default.
> >
> > Hi Steven,
> >
> > thanks for reviewing
> >
> > > I have no opinion about this, lgtm
> >
> > Neither do I. As this is a reversion, I meant to say that the original value
> wasn't irrational as it might have  appeared when the change to 3 was made.
> > Whether it's 100, 1000 or 10000 might be debatable, just 3 is way too low,
> so without any strong reason towards 100 or 10000, I think that going back
> to the original value makes the most sense.
> 
> If 3 is too small and 1000 is too large then try the value in the middle
> sqrt(3*1000) = ~50

How about 

(3 + 1000) / 2 = ~501

or 

sin((asin(0.003) + asin(1)) /2) * 1000 = ~708

😊
sw
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