rtspsrc enhancement with events

Submitted by Farkas Levente @lfarkas

Assigned to Farkas Levente @lfarkas

Link to original bug (#669746)

Description

hi,
currently the rtspsrc in gstreamer are not able to handle any kind of play related events except seek. even seek was implemented at the rtsp level (send a pause then seek and play). all other events are dropped in
http://cgit.freedesktop.org/gstreamer/gst-plugins-good/tree/gst/rtsp/gstrtspsrc.c
in gst_rtspsrc_handle_src_event then in gst_rtspsrc_handle_internal_src_event function which simple drop these events.
we'd like to implement at least SEEK, RATE, STEP and NAVIGATION event in rtspsrc to be able to send these events through rtspsrc and the server get it. so we'd like to play with different rate, backward and frame by frame through rtsp. and if the server implements it than it can handle it. (of course we'd like to implement the server side too).

of course we'd like to add the patches to gstreamer, but before we start to implement it we'd like to ask core gstreamer developers which would be the preferred way you ie. how to implement it to be easily accepted by you to inclusion. we thought the best would be to send these events through the rtcp protocol which is something for it.
we'd like to do it first in the 0.10 branch.

what do you think about it?

thanks in advance.