[Bug 680091] [0.11] dvbsuboverlay: mangles video timestamps (?), crash on composition unref

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=680091
  GStreamer | gst-plugins-bad | 0.11.x

--- Comment #2 from Mark Nauwelaerts <mnauw at users.sourceforge.net> 2012-07-17 20:40:56 UTC ---
Created an attachment (id=219066)
 View: https://bugzilla.gnome.org/attachment.cgi?id=219066
 Review: https://bugzilla.gnome.org/review?bug=680091&attachment=219066

dvbsuboverlay test patch

Not clear what is happening yet, but the following is so far:
* timestamps seem to come out fine
* no problem in 0.10
* also no problem in a hand-crafted overlay pipeline in 1.0
* the attached patch to dvbsuboverlay essentially disables all (overlay)
processing and replaces this with some busy loop, which happens to also
reproduce the described playback

All in all, very likely this has little to do with dvbsuboverlay or timestamp
mangling, but something else happening (in the pipeline) to the buffers as they
are kept mapped for some time (as illustrated by this patch).

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