playback: Support for VobSub subtitles (.idx files)

Submitted by Sven Arvidsson @whizse

Link to original bug (#583267)

Description

With bug 350311 resolved, GStreamer should now support subpicture subtitles, but it doesn't seem to work in Totem.

All I get when I launch video.avi with a video.sub as a subtitle is this:

** Message: Error: Internal data stream error.
gstmpegdemux.c(2536): gst_flups_demux_loop (): /GstPlayBin2:play/GstURIDecodeBin:uridecodebin1/GstDecodeBin2:decodebin20/GstMpegPSDemux:mpegpsdemux0:
No valid streams detected

This might even be a regression, as previous versions just ignored the .sub file (if it wasn't a text subtitle) and let me play the video.

Bastien Nocera @hadess said:

Versions of Totem and Gstreamer bits?

And does it work using playbin2 on the command-line?

gst-launch-0.10 playbin2 uri="...." suburi="...."

Sven Arvidsson @whizse said:

Totem 2.27.1
gstreamer0.10-plugins-bad 0.10.11.3
gstreamer0.10-plugins-ugly 0.10.11
gstreamer0.10-plugins-good 0.10.14.3
gstreamer0.10-plugins-base 0.10.23

I get the same error with the pipeline, so it seems there's still something missing on the GStreamer side.

Jan Schmidt @thaytan said:

I haven't looked at vobsub subtitles too closely, but apart from obviously needing support to demux and hook them into the subpicture renderer, I think they also need an extra text file that supplies the palette information?

If so, we need a mechanism to provide both files in a logically-linked manner.

Any chance of a link to a sample or two, to save me hunting them up?

Bastien Nocera @hadess said:

The *.vob at http://samples.mplayerhq.hu/sub/ should do the trick.

Jan Schmidt @thaytan said:

Oops, I put this comment on Bug 350311 that should have gone here:

I have some local commits to push after we thaw that add support for DVD subpictures in MPEG-PS streams to mpegpsdemux. With that in place, the subpictures can be rendered by playbin/playbin2, but there are a few more pieces missing:

• external vobsub also requires the .idx in order to get the colour palette to use and some other info.
• playbin2 needs to group the subpicture streams together and expose them as selectable subtitle streams for the players.

Sven Arvidsson @whizse said:

Sounds great! Thanks for working on this.

Bastien Nocera @hadess closed a related bug:

*** Bug 582508 has been marked as a duplicate of this bug. ***

Shahar Or said:

There's a bounty on this bug:
http://www.fossfactory.org/project/p188

Bastien Nocera @hadess closed a related bug:

*** Bug 591711 has been marked as a duplicate of this bug. ***

Bastien Nocera @hadess said:

There's a test file at:
https://bugzilla.gnome.org/show_bug.cgi?id=591711#c8

Sebastian Dröge @slomo closed a related bug:

*** Bug 430373 has been marked as a duplicate of this bug. ***

bcx..@..il.com said:

can you let me know what's the status on this bug since 2 years passed? And I still had problem to playback .idx+.sub (vob sub) with playbin2.

Sebastian Dröge @slomo said:

It's still not supported and nobody is working on this AFAIK

Alan Pater said:

Testing on Ubuntu Trusty (14.04) and it is not working.

Using gstreamer 1.0 via Totem 3.10.1

Tim Müller @tpm said:

I'll have a look at this once 1.4 is out.

Alan Pater said:

Is this being worked on?

Sebastian Dröge @slomo said:

Not that I'm aware of

Edward Hervey @bilboed said:

the dvdsub element supports those streams (with the palette as an event)

This requires several parts:

• Supporting multiple URI (and not just one sub uri) in uridecodebin3
• Making sure those media types are properly typefound
• Figure out a way to use them in decodebin3

mentioned in issue #552

mentioned in merge request !160 (merged)