[gstreamer-bugs] [Bug 601262] It appears gst-launch playbin2 fails to dynamically build the appropriate pipeline when I try to stream MPEG4 Part2 content from a webcam via Ethernet.

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=601262
  GStreamer | gstreamer (core) | 0.10.25

--- Comment #13 from Arnout Vandecappelle <arnout at mind.be> 2010-06-09 13:03:44 UTC ---
(In reply to comment #12)
> Making such changes (caps) requires a co-ordinated effort across multiple
> modules in terms of adjusting the caps and ranks and making sure everything is
> released in the right order so nothing breaks.

I believe we're only talking about a caps change, since the patches from
#578926 have already been committed.  At least, Sebastian said he would commit
them, I never checked.

That said, the rank change indeed has to wait for a good/bad release cycle
since it depends on the caps.

> Fiddling with the ranks to accommodate a proprietary decoder sounds like a bad
> idea to me.

 I only know two mpeg4 decoders: ffmpeg and fluendo.  Neither does parsing
(unless the ffmpeg decoder has changed recently).  Both of them have PRIMARY
rank, so higher than mpeg4videoparse's SECONDARY rank.

 The rank change of the parser was suggested by Jan Schmidt and is also used by
mp3parse.  See #578926.

> Things should work if the caps are correct and complete
> irrespective of the exact ranks IMHO, so we should probably get the caps
> fixed..

Again, see #578926.  I originally did it like that (changing the caps of
typefind), but Jan Schmidt disagreed.


Can someone with sufficient power mark this one as a duplicate of #578926?

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