Can I programmatically make x264enc emit an IFrame?

[Tim-Philipp Müller]

On Thu, 2013-04-04 at 17:21 +0200, Jack Jansen wrote:

Hi,

> I'm new to this list, so if this isn't the right forum for usage questions: please point me in the right direction. Thanks!
> 
> I'm using x264enc in a conferencing setting, and I'd like to have a programmatic way to make it emit in IFrame (or IDR, to use the correct name). I need this so that I can have a stable picture quickly when new receivers have joined or the view has changed (on the receiving side).
> 
> Is such a feature available?
> 
> And, if it isn't, I'd like to add one. But I'm new to gstreamer development as well as to this mailing list, so I could use some guidance as to what the common (or "best") way is to implement such new functionality. Should I add in interface whereby my app can trigger the iframe emission? Use an event? Something else?
> 
> I have looked through the documentation but haven't been able to find answers to this question. If it is in the docs: could someone please point me in the right direction?

There's a "force keyframe" API which recent versions of x264enc
implement:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gstvideo.html

Cheers
 -Tim