HLS output to decklink SDI

[vmm2017]

I am new and trying to figure out how to output HLS stream to DeckLink card.

My command line is as follows:

gst-launch-1.0 souphttpsrc location=http://devimages.apple.com/iphone/samples/bipbop/gear4/prog_index.m3u8 ! hlsdemux ! decodebin name=u u. ! queue ! videoconvert ! videoscale ! decklinkvideosink mode=15 u. ! queue ! decklinkaudiosink

Output:
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
WARNING: from element /GstPipeline:pipeline0/GstDecodeBin:u: Delayed linking failed.
Additional debug info:
./grammar.y(506): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstDecodeBin:u:
failed delayed linking some pad of GstDecodeBin named u to some pad of GstQueue named queue1
ERROR: from element /GstPipeline:pipeline0/GstHLSDemux:hlsdemux0: GStreamer encountered a general stream error.
Additional debug info:
gstadaptivedemux.c(2148): _src_chain (): /GstPipeline:pipeline0/GstHLSDemux:hlsdemux0:
stream stopped, reason not-negotiated
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...


Please guide me.
Thanks
Vick

[Tim Müller]

On Fri, 2017-08-11 at 11:06 -0700, vmm2017 wrote:

Hi,

> I am new and trying to figure out how to output HLS stream to
> DeckLink card.
>
> My command line is as follows:
>
> gst-launch-1.0 souphttpsrc
> location=http://devimages.apple.com/iphone/samples/bipbop/gear4/prog_
> index.m3u8
> ! hlsdemux ! decodebin name=u u. ! queue ! videoconvert ! videoscale
> !
> decklinkvideosink mode=15 u. ! queue ! decklinkaudiosink

Try something like:

  gst-launch-1.0 playbin uri=http://...  \
      audio-sink="decklinkaudiosink" \
      video-sink="cecklinkvideosink mode=15"

Cheers
 -Tim

--
Tim Müller, Centricular Ltd - http://www.centricular.com

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[vmm2017]

Tim,

Thanks for command.

I finally managed to get the SDI to output video but now picture is all red means that I need to force it to use pix format uyvy422.

Any ideas how can I set that ?

Thanks,
V

[Baby Octopus]

Both videoscale and videoconvert would autonegotiate based on the mode that you have set on decklinkvideosink. Can you enable verbose mode to see if something isn't right?

[vmm2017]

I managed to get this working, Thanks for all the help.

Now I am running in to problem where - my pipeline pauses due to buffering.
How do add buffer or queue to avoid that ?

Please help.

Thanks,
V