playbin not displaying DVD subpicture in MKV file

[Jérôme Laheurte-3]

Hello. I encoded a DVD to MKV using Handbrake on OSX. The subtitles show up fine using VLC but not using gst-launch-1.0 uri=« file:///xxx.mkv ». Dumping the graph shows that the DVD subtitles are detected; subtitleoverlay uses the right element (dvdspu), GST_DEBUG=*:4 shows not error or warning (there are messages about SPU packets popped, everything seems fine), but nothing actually shows up. Is that a known issue ?

Best regards
Jérôme Laheurte


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[Tim Müller]

On Sun, 2016-12-18 at 15:41 +0100, Jérôme Laheurte wrote:

> Hello. I encoded a DVD to MKV using Handbrake on OSX. The subtitles
> show up fine using VLC but not using gst-launch-1.0 uri=«
> file:///xxx.mkv ». Dumping the graph shows that the DVD subtitles are
> detected; subtitleoverlay uses the right element (dvdspu),
> GST_DEBUG=*:4 shows not error or warning (there are messages about
> SPU packets popped, everything seems fine), but nothing actually
> shows up. Is that a known issue ?

Could it be this issue?
https://bugzilla.gnome.org/show_bug.cgi?id=663750

Cheers
 -Tim

--
Tim Müller, Centricular Ltd - http://www.centricular.com
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[Jérôme Laheurte-3]

> Le 18 déc. 2016 à 16:54, Tim Müller <[hidden email]> a écrit :
>
> On Sun, 2016-12-18 at 15:41 +0100, Jérôme Laheurte wrote:
>
>> Hello. I encoded a DVD to MKV using Handbrake on OSX. The subtitles
>> show up fine using VLC but not using gst-launch-1.0 uri=«
>> file:///xxx.mkv ». Dumping the graph shows that the DVD subtitles are
>> detected; subtitleoverlay uses the right element (dvdspu),
>> GST_DEBUG=*:4 shows not error or warning (there are messages about
>> SPU packets popped, everything seems fine), but nothing actually
>> shows up. Is that a known issue ?
>
> Could it be this issue?
> https://bugzilla.gnome.org/show_bug.cgi?id=663750

Spot on. I re-encoded the same DVD after disabling Handbrake’s autocrop « feature » and the subtitles are working… Thanks!

Best regards
Jérôme Laheurte


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