[Bug 690014] playbin: lockup when switching video or audio tracks, then seeking

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=690014
  GStreamer | gst-plugins-base | git

--- Comment #14 from Brendan Long <self at brendanlong.com> 2013-01-10 22:30:39 UTC ---
I was going some research today to try to figure out how major programs are
using this without problems, and what I've found is that the majority of
GStreamer media players don't expose multiple tracks (most just use whatever is
auto-selected). Totem is the only exception I found, and it runs into a
different bug: If you switch audio tracks (Sound -> Languages), the audio
doesn't actually change until you do a seek. If you switch text tracks (View ->
Subtitles), subtitles stop working until you do a seek. I ran into that bug
before and assumed it had something to do with buffers, which is why I'm doing
a (flushing) seek right after I switch tracks.

You can reproduce this yourself by opening either of the videos I linked to in
my Dropbox in Totem, and trying to switch the language or subtitles.

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