How can I deserialize codec_data from h.264 (avc) caps

[Nicolas Dufresne]

Le jeudi 06 septembre 2018 à 17:54 -0700, David Ing a écrit :
> Yes, it is just a hex representation of a byte array.
> 
> To clarify my question:  How can I extract the information from the
> byte array?
> 
> I found some code inside gst-plugins-bad (gsth264parse.c) that seems
> like it might work.  I am probably going to hack something together
> from that (unless anyone knows of a better solution).

If you want to parse the H264 Codec data, you can use the H264 parser
library in -bad. The codec data contains PPS and SPS nals. You'll have
to iterate over the AVC nals, and parse them base on their type.

> 
> On Thu, Sep 6, 2018 at 4:44 PM Nicolas Dufresne <nicolas at ndufresne.ca
> > wrote:
> > Le jeudi 06 septembre 2018 à 14:25 -0700, David Ing a écrit :
> > > I can't figure out how to deserialize the codec_data within a
> > caps
> > > structure like this one:
> > > 
> > > video/x-h264
> > > > stream-format=(string)avc
> > > > alignment=(string)au
> > > > level=(string)4.2
> > > > profile=(string)main
> > > >
> > codec_data=(buffer)014d402affe10029674d402a965403c0113f2e02d4040405
> > > >
> > 00000300010000030032e04000fa000005dc026a540ed0913501000468ce3520
> > 
> > I believe this is just hex representation of the bytes, isn't it ?
> > From
> > API point of view, gst_caps_from_string() will handle this. I
> > believe
> > we use a GValue transform to do string to GstBuffer, and have a
> > handle
> > for that transform registered into GLib.
> > 
> > > > width=(int)1920
> > > > height=(int)1080
> > > > framerate=(fraction)25/1
> > > > pixel-aspect-ratio=(fraction)1/1
> > > > interlace-mode=(string)progressive, parsed=(boolean)true
> > > > 
> > > Can someone point me in the right direction?
> > > _______________________________________________
> > > gstreamer-devel mailing list
> > > gstreamer-devel at lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> > 
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