[mythtv-users] Subtitle sync

[Ben Healy]

----- Original Message -----

> From: Ben Healy <melben1001 at yahoo.com.au>
> To: Mike Holden <mikeholden99+mythtv at gmail.com>; Discussion about MythTV <mythtv-users at mythtv.org>
> Sent: Thursday, 10 March 2016, 17:22
> Subject: Re: [mythtv-users] Subtitle sync
> 
>> ________________________________
>>  From: Mike Holden <mikeholden99+mythtv at gmail.com>
>> To: Ben Healy <melben1001 at yahoo.com.au>; Discussion about MythTV 
> <mythtv-users at mythtv.org> 
>> Sent: Thursday, 10 March 2016, 15:16
>> Subject: Re: [mythtv-users] Subtitle sync
>> 
>> 
>> 
>> On 10 March 2016 at 13:39, Ben Healy <melben1001 at yahoo.com.au> wrote:
>> 
>> Hi All
>>> 
>>> I was using myth 0.27.6, now upgraded to 0.28 from mythbuntu ppa on an 
> ASUS celeron chromebox with intel graphics.
>>> 
>>> I'm in Australia recording DVB which uses Teletext subtitles.
>>> 
>>> The issue I'm facing is the Teletext subtitles are appearing 
> slightly ahead of the video/audio, so on a scene with a lot of quick dialogue 
> the subtitles have been and gone before the person speaks.
>>> 
>>> I am seeing this issue with 0.27 and 0.28. I setup another frontend on a 
> PC with better specs and an nvidia card and saw the same issue.
>>> 
>>> I see reference to a TOGGLESUBDELAY action in the wiki and it's 
> referenced in the menu_playback.xml file, but when subtitles are enabled that 
> menu item doesn't appear. I also can't find it in the frontend playback 
> keybindings. I presume I could fix my issue with this if I could find this 
> setting.
>>> 
>>> 
>>> Does anyone in Australia see the same issue of Teletext subtitles on DVB 
> transmissions being out of sync?
>>> 
>>> Can anyone tell me if the TOGGLESUBDELAY action is still there or should 
> be still there?
>>> 
>> 
>> 
>> Hey Ben,
>> 
>> 
>> Can't say I've ever noticed an issue.
>> 
>> 
>> I don't use subtitles too often, but when I do, they always seem to be 
> timed correctly.
>> 
>> 
>> Which channel and location are you referring to? Maybe it's specific to 
> a certain station or location?
>> 
>> 
>> -- 
>> Mike Holden
>> 
> 
>> 
> 
> I'm in Melbourne and it appears to be consistent, but I'll do some more 
> testing of all networks and report back.
> 
> 
> Ben


It does seem to happen on recordings from all channels.

I have tested with a couple of upnp clients and when I was on 0.27, VLC on an iPad played the recordings with the teletext subtitles in sync and on 0.28 I have tested on Android with upnplay and mxplayer and the subtitles are in sync there too.

This makes me think this is a myth frontend issue, but it would appear not that many people use subtitles and even fewer use teletext subtitles.

Ben