use gstreamer to stream decklinkvideosource into transport stream

[Peter Maersk-Moller]

Hi.

Use 'gst-inspect-1.0 x264enc' to see the options for the H.264 encoder. One
of the is to set the coding type with respect to CBR or VBR. Look at the
'pass' option.

Can you share your setup for the DVB-S2 transmitter? Is it identical to the
setup of Alex Csete?

Note that unless you use 'Generic Stream Encapsulation' (supported by
DVB-S2), you will need to encapsulate your stream in MPEG TS.

Best regards

Peter Maersk-Moller



On Fri, Aug 12, 2016 at 5:49 PM, <g.roelant at telenet.be> wrote:

> ok, thanks this works....
>
> in order to send this ts to a dvb-s2 transmitter in gnuradio, this stream
> has to be in constant bit rate (CBR)
> is this feature already provided?
>
>
> ----- Oorspronkelijk bericht -----
> Van: "Tim Müller" <tim at centricular.com>
> Aan: "Discussion of the development of and with GStreamer" <
> gstreamer-devel at lists.freedesktop.org>
> Verzonden: Vrijdag 12 augustus 2016 17:23:33
> Onderwerp: Re: use gstreamer to stream decklinkvideosource into transport
> stream
>
> On Fri, 2016-08-12 at 15:38 +0200, g.roelant at telenet.be wrote:
>
> Hi,
>
> > gst-launch-1.0 decklinkvideosrc device-number=2 connection=HDMI
> > mode=11 ! video/x-raw,format=I420,width=1920
> > ,height=1080,profile=main ! x264enc tune=zerolatency byte-stream=true
> > bitrate=10000 threads=2 ! h264parse config-interval=1 ! rtph264pay !
> > udpsink host=127.0.0.1 port=5000
> > WAARSCHUWING: foutieve pijplijn: kon decklinkvideosrc0 niet verbinden
> > met x264enc0
> >
> > gstreamer can not connect decklinkvideosrc0 to x264enc0
>
> Try just
>
>   decklinkvideosrc device-number=2 connection=HDMI mode=11 !
> videoconvert ! x264enc ! video/x-h264,stream-format=byte-
> stream,profile=main ! ...
>
>
> no need to specify a caps filter if you specify the mode already. Also
> there's no "profile" field in raw video caps (you will need to put
> filtercaps after x264enc to force a profile).
>
> Note that I'm not sure if x264enc will handle interlaced input
> correctly (there might be some code missing that looks at the incoming
> video stream and configures the encoder properly for interlaced input).
>
> Cheers
>  -Tim
>
> --
> Tim Müller, Centricular Ltd - http://www.centricular.com
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