[Bug 737396] decodebin doesn't limit src caps on parsers

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=737396
  GStreamer | gst-plugins-base | git

--- Comment #5 from Sebastian Dröge (slomo) <slomo at coaxion.net> 2014-09-26 19:20:54 UTC ---
(In reply to comment #2)

> 2. even when is_parser_converter branch is executed, the following code in
> decodebin
> 
>     /* Append the parser caps to prevent any not-negotiated errors */
>     filter_caps = gst_caps_merge (filter_caps, gst_caps_ref (caps));
> 
> just merges the filtered caps with parser original srcpad caps, so it ends up
> where it was at the beginning. perhaps it should be in "else" block?

But the decoder preferred caps are at the beginning. And e.g. h264parse prefers
them over others then.

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