Gstreamer udp not working on decklinkvideosink

[Sankalp Gupta]

Hi,

I am new to gstreamer and I am trying to decode a transport stream taken using udp as source and decklink card as sink. The command I’m using is:

 

gst-launch-1.0 uridecodebin uri=udp://<udp_address_with:port> name=decode decode. ! interlace field-pattern=2:2 ! videoconvert ! video/x-raw,format=UYVY ! videoscale ! video/x-raw,width=1920,height=1080 ! videorate ! video/x-raw,framerate=25/1 ! decklinkvideosink mode=13 decode. ! audioconvert ! decklinkaudiosink

and the output I’m getting is

 

Setting pipeline to PAUSED ...

Pipeline is live and does not need PREROLL ...

Setting pipeline to PLAYING ...

New clock: GstDecklinkOutputClock

WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:decode: Delayed linking failed.

Additional debug info:

./grammar.y(506): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstURIDecodeBin:decode:

failed delayed linking some pad of GstURIDecodeBin named decode to some pad of GstInterlace named interlace0

Redistribute latency...

And is stuck on this and card doesn’t give any output.

 

The info of the stream coming from udp is:

 

Topology:

  container: MPEG-2 Transport Stream

    audio: MPEG-1 Layer 2 (MP2)

 

Properties:

  Duration: 99:99:99.999999999

  Seekable: no

  Tags:

      audio codec: MPEG-1 Audio

      has crc: true

      channel mode: stereo

      nominal bitrate: 128000

      bitrate: 128000

I’ve tried same command with a file and that is perfectly working but this above isn’t.

 

I really need help on this. Please assist me what I’m doing wrong and what should’ve been done.

 

PS: If you need anymore logs please do let me know.

 

Thanks and Regards

Sankalp Gupta

 

Sent from Mail for Windows 10

 

---

This email has been checked for viruses by AVG antivirus software. www.avg.com

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Sebastian Dröge-3]

On Wed, 2018-07-04 at 11:24 +0530, Sankalp Gupta wrote:
>
> ./grammar.y(506): gst_parse_no_more_pads ():
> /GstPipeline:pipeline0/GstURIDecodeBin:decode:
>
> failed delayed linking some pad of GstURIDecodeBin named decode to
> some pad of GstInterlace named interlace0

This tells you that the video part of the pipeline is not connected at
the end ...

> Redistribute latency...
>
> And is stuck on this and card doesn’t give any output.
>  
> The info of the stream coming from udp is:
>  
> Topology:
>
>   container: MPEG-2 Transport Stream
>
>     audio: MPEG-1 Layer 2 (MP2)

... and this says that there is no video stream detected here. So the
problem is unrelated to the Decklink card but either there is no video
stream inside the MPEG-TS container or we fail to detect it for some
reason.

In case of the latter, please file a bug with a test case and a stream
dump to reproduce the problem.

--
Sebastian Dröge, Centricular Ltd · https://www.centricular.com

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel