[mythtv-users] Mythfrontend failing to display subtitles for some type of file
lists at glidos.net
Sun Sep 4 14:28:09 UTC 2022
On 04/09/2022 14:34, John Pilkington wrote:
> On 04/09/2022 13:36, Paul Gardiner wrote:
>> One further discovery: if I demux the orifinal file to produce two
>> files, one containing combined video and audio, the other (a .srt
>> file) containing just the subtitles, mythfrontent displays the
>> subtitles without problem. The logs suggest this mode uses a very
>> different code path, so the experiment didn't help track down the cause.
>> I wonder if, in the failing case - without demuxing, the subtitles are
>> being displayed off screen or with opacity 0. Perhaps it's silently
>> failing to load a font. The logs show events as each subtitle should
>> be displayed.
>> At the moment I can't think of a way to track this down further.
> I habitually drop subtitles, so don't have much practical experience;
> but your posted log included
> AFD: ScanATSCCaptionStreams() called with no PMT
Yes, I did notice that eventually, after having wrongly posted that
there were no errors. The strange thing is that mythfrontend still
offers the option to enable/disable these subtitles during playback and
some sort of libass event occurs as the time of each phrase is reached.
I suppose it's a possibility that - due to that error above -
mythfrontend is setting itself up unable to respond to those events.
> which doesn't look good.
> I posted my 'typical' remux command line on the dev list on Tuesday. It
> migh be worth adding an 'scodec copy' phrase to that; and use
Thanks. That's a possibility I guess. My current work around is to use
leanfront instead for this type of file, but then it's a pain not to
have a simple toggle button for subtitle on/off.
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