qtgstreamer: Buffer Timestamp

[Martin Jackson]

Hi George,

Thanks for the prompt reply!

I wondered if something like that was possible, but I couldn't figure out
how to access the underlying structure of the QGst::Buffer class, or
alternatively to promote a GstBuffer to a QGst::Buffer

Could you possibly point me in the right direction on how to do this?

Many Thanks

Martin Jackson


On Thu, Jan 2, 2014 at 2:23 PM, George Kiagiadakis <
kiagiadakis.george at gmail.com> wrote:

> On Thu, Jan 2, 2014 at 2:54 PM, Martin Jackson
> <mjackson220.list at gmail.com> wrote:
> > Dear gstreamer developers,
> >
> > I'm using qtgstreamer 0.10.2-2ubuntu (as supplied in my ubuntu 'saucy'
> > distro), and I wish to pump demuxed video packets into a ffdec_h264
> element.
> >
> > I've managed to do this without problems in a 'regular' gstreamer / glib
> > program, and I just use the GstBuffer object and set the appropritate
> > parameters thereof, including using GST_BUFFER_TIMESTAMP(x) to set the
> > timestamp values.
> >
> > However, I wish to do this in a qtgstreamer environment, but I am
> baffled as
> > to how to set the timestamps on buffers. The Buffer object has a
> timeStamp
> > method, which as far as I can tell is a 'getter' of the timestamp, but
> not a
> > 'setter'.
> >
> > There is no other way that I can see (perhaps I misunderstood something)
> to
> > set the timestamp of a buffer. Is this indeed the case? Can anyone give
> me a
> > pointer on how to do this?
> >
>
> This sounds right, there seems to be no way to do it. I don't think
> there is a good reason for this, it's just an omission in the
> qt-gstreamer API. You could patch it and add the relevant setter
> method, or use the C API directly in combination with qt-gstreamer.
>
> Regards,
> George
>
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