[mythtv] Option "Use FFmpeg's original MPEG-TS demuxer"

Jean-Yves Avenard jyavenard at gmail.com
Thu Apr 1 06:34:31 UTC 2021


I added that option many moons ago.
It was mostly designed at the time to check if a mpeg-ts file was
broken; not something that would typically be a problem with OTA
recordings but when dealing with HLS streaming could be quite common.

The mythtv mpeg-ts demuxer is very old and has received very little
updates over the years.

Things that will be broken using the ffmpeg's mpegts demuxer are
mostly subtitles and how to choose different audio tracks.
It doesn't support the callbacks that myth required when the
resolution or the content changes.

So it's fine to play a simple file, anymore than that and it's not gonna work.

On Thu, 1 Apr 2021 at 07:45, Klaas de Waal <klaas.de.waal at gmail.com> wrote:
> Hi,
> I'd like to consult the collective memory about the option "Use FFmpeg's original MPEG-TS demuxer".
> Me and PaulH have been looking into playback issues with recordings from the Finnish channel YLE. The playback issues disappear when this option is selected. See mailing list https://forum.mythtv.org/viewtopic.php?p=21615#p21615 for details.
> However, this option is only available when a debug build is made and the option is accompanied by a threatening help text:
> "Experimental: Enable this setting to use FFmpeg's native demuxer. Things will be broken."
> Does anybody know where this all comes from?
> Is there really a reason to hide this option?
> I'd like to make the option always available as it appears solve the YLE problem.
> Thanks,
> Klaas.
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