Fwd: Vaapih264enc and Intra/Key frame request

[Sreerenj Balachandran]

On Wed, Aug 2, 2017 at 11:37 PM, Hyunjun Ko <zzoon at igalia.com> wrote:

> Matteo Valdina wrote
> > Hi all,
> >
> > I'm currently using vaapih264enc for a live streaming (RTP) project
> (1.8.3
> > for now). I need to generate intra-frame upon an external request (like
> > packet loss indication).
> >
> > For asking to the encoder to generate the intra-frame, I'm using this
> > code:
> >
> > GstEvent* event = gst_video_event_new_downstream_force_key_unit
> > (GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE, TRUE, 1);
> > gboolean res = gst_element_send_event(encoder_, event);
> >
> >
> > I tested and analyzed the output stream generated by x264enc and it
> works.
> >
> > But when I use vaapih264enc. I see generate SPS, PPS, SEI and Non-IDR
> > frames.
> >
> > Does someone try a similar scenario and verify if intra frame is
> generated
> > as expected?
>
> This is implemented recently, which is doing that it produces IDR if
> FORCE_KEY_UNIT.
>
>
Okay, so this one is already landed in master, thanks Hyunjun :)

https://cgit.freedesktop.org/gstreamer/gstreamer-vaapi/commit/?id=
> 465d5868d96ec7c839bfdb4a3e17f33a8bae1206
>
> Use gstreamer-vaapi on the master.
>
>
> Matteo Valdina wrote
> > I'm also surprised that there is no way to disable periodic key frame
> > generation. Documentation states 0 for auto computation, accepted range 1
> > -
> > 300. When I tried with 0 GLib assert that it is not a valid value.
> >
> > Is it possible to disable this feature?
>
> Currently 0 is disabled but there is logic to calculate based on provided
> framerate.
> We can enable it after verification (file up to bugzilla please)
> But I guess you want to disable forever (and produce I-frame when you
> want),
> that's not supported for now. You can raise this up to bugzilla as Sree
> said.
>
>
> Matteo Valdina wrote
> > Best regards
> > Matteo Valdina
>
>
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.
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> tp4684076p4684080.html
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-- 
Regards,

Sreerenj Balachandran
Intel Open Source Technology Center
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