[Bug 705991] Adding support for DASH common encryption to qtdemux and dashdemux

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=705991
  GStreamer | gst-plugins-good | git

--- Comment #23 from Chris Bass <floobleflam at gmail.com> 2013-11-25 14:18:12 UTC ---
(In reply to comment #22)

The case of multiple protection systems is a bit different from that of
multiple audio streams: in the multiple audio stream case there are a number of
different streams of data (i.e., a number of different audio tracks), one of
which is selected for presentation; in the case of multiple protection systems
using cenc, however, there aren't multiple tracks of data but a single
encrypted track that can be decrypted via any one of the protection systems for
which there is a pssh box.

All we really need is a way for a suitable cenc decrypter element to be
autoplugged after qtdemux. Do you see any particular problems with the solution
I outlined above, in which an array of protection-system-ids is used in the src
pad caps in order to autoplug a suitable decrypter element?

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