Created attachment 179082 [details] [review]
Proposed patch, also as git branch: http://cgit.freedesktop.org/~sjoerd/gst-plugins-bad/log/?h=vp8

http://www.webmproject.org/code/specs/rtp/ has a DRAFT rtp spec for VP8. I've implemented this in the attached patch. The implementation is quite mimimal and has the following todo items:

* It does never set the N bit. To do this correctly it's necessary to parse even more of the bitstream 
   header, which is a pain. Also what the conditions are to set the bit aren't really properly defined. Not
   ever setting it should never be an issue (we're not telling the receiver that the packet is a 
   non-reference frame that's safe to drop).
* We can't set the PictureID in the payloader (not mandatory), but do correctly cope in the depayloader
   when it's set
* the SDP encoding name is VP8-DRAFT-0-3-2 instead of VP8 as i'm not looking forward to versions in 
   the wild that are incompatible with whatever the final draft is :)
* The depayloader is minimal and isn't able to handle frames with incomplete partitions (due to 
   packet loss). Otoh that's impossible to do correctly with the current spec and i'm not sure how to
   feed it into the vpx decoder (it's not documented how this could be done)

None of these items are big enough to not merge the patches though (imho) :)