[Bug 668762] regression: playbin2: dvd menu doesn't come up with flags |= deinterlace

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=668762
  GStreamer | gst-plugins-base | git

--- Comment #9 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2012-01-30 18:49:31 UTC ---
Created an attachment (id=206463)
 View: https://bugzilla.gnome.org/attachment.cgi?id=206463
 Review: https://bugzilla.gnome.org/review?bug=668762&attachment=206463

resindvd: fix wedge in preroll when playbin2 deinterlacing is enabled

When deinterlacing is enabled, an extra colorspace element is added.
Colorspace is a basetransform, and is then the only basetransform
element on the video path. A while ago, basetransform started delaying
events till caps were set on its source pad. These things conspired
to end up sending the DVD highlight events onto a blocked pad on
subtitleoverlay.

Ensuring these highlight events are only sent once we're in playing
mode fixes the issue.

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