[gst-devel] New EVENT : Video Fast Update

[Stefan Kost]

On 07.09.2010 14:33, Olivier Crête wrote:
> Hi,
>
> On Tue, 2010-09-07 at 14:12 +0300, Miguel Verdu wrote:
>   
>> We are planning to add support in our video codecs for the fast update
>> commands defined in H.245 recommendation. This is also functionally
>> similar to what is required by the RTP/AVPF spec (RFC4585).
>>     
> I've already started to implement RTP/AVPF, code at:
> http://git.collabora.co.uk/?p=user/tester/gst-plugins-good.git;a=shortlog;h=refs/heads/avpf-timing
>
>
>   
>> My current proposal tries to be general enough to cover what is required by
>> both recommendations
>>
>> - New upstream event
>> Name: PictureLoss
>>  Empty stuct
>>     
> There is already a "GstForceKeyUnit" event defined for that, and it is
> implemented by most of the relevant open source encoder (x264enc,
> gst-ffmpeg and theoraenc) elements. My AVPF branch produces that
> GstForceKeyUnit event on the relevant AVPF RTCP messages.
>
> Documented at:
> http://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/docs/design/draft-keyframe-force.txt
>
>
>   
>> Name: SliceLoss
>> Name: ReferencePictureSelection
>>     
> As for the two other types, I agree that we should have new events for
> those. Maybe extend GstForceKeyUnit for the slice loss. But
> ReferencePictureSelection probably requires a new custom event type.
>
> And don't feel too bad, I just re-implemented something that had existed
> for like a year ;)
>
>   
And we should move the event to e.g. the video libarry to have it
documented so that people find it :)
https://bugzilla.gnome.org/show_bug.cgi?id=607742

Stefan