[Bug 733148] New: audio/video encoder base classes needlessly delay caps events

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733148
  GStreamer | gst-plugins-base | git

           Summary: audio/video encoder base classes needlessly delay caps
                    events
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: slomo at coaxion.net
         QAContact: gstreamer-bugs at lists.freedesktop.org
                CC: mnauw at users.sourceforge.net,
                    nicolas.dufresne at collabora.co.uk
     GNOME version: ---


+++ This bug was initially created as a clone of Bug #733147 +++

The encoder base classes delay caps events currently. This was added as part of
bug #680614.

Reason is that a few encoders need to wait until they get other sticky events
(tags!) before they can negotiate... as the tags are part of the caps (vorbis
streamheaders, etc).
However doing this delaying unconditionally for everything in the base class
seems wrong and causes problems (Nicolas has details). If anything the
subclasses have to delay, as only the subclasses really know how long to delay.
Currently we always delay until the first buffer but that might be too late or
too early!

I would like to change this for 1.6, even if it is an ABI change. To make that
possible we will have to fix all subclasses though.

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