[vlc-devel] [PATCH 3/6] clock: add vlc_clock_SetDecoderLatency
thomas at gllm.fr
Thu Oct 3 09:37:52 CEST 2019
Any last words ?
On Tue, Oct 1, 2019, at 14:33, Thomas Guillem wrote:
> On Mon, Sep 30, 2019, at 21:52, Rémi Denis-Courmont wrote:
> > Le torstaina 26. syyskuuta 2019, 17.38.11 EEST Thomas Guillem a écrit :
> > > The highest decoder latency of all clocks will be used to setup the initial
> > > dejitter delay.
> > We cannot generally, or even usually, measure the decoder latency.
> I agree, but we the avcodec module can guess it, according to its
> thread_count and fps. It's not perfect but it's sufficient to fix all
> problems we have with low fps samples (when you have a CPU with lot of
> > On top of that, even if we could measure it, it does not even seem to mean
> > anything if the set of active ES changes, or if for any reason the ES are not
> > in sync (input slaves, multiple RTP sessions, etc).
> Yes, this is why this function can fail. vlc_clock_SetDecoderLatency()
> won't be able to handle a big delay ( > 300ms = file-caching) if a
> video track is enabled midstream. Everything is handled in avcodec:
> This is not a perfect solution but it will fix most issues we have with
> normal media samples (video starting near the audio).
> > --
> > レミ・デニ-クールモン
> > http://www.remlab.net/
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