Black magic decklink and wowza

[Ajitpal_Singh]

I’m having black magic decklink card installed on my machine. I’m using VLC to get the SDP generated for wowza server. The command i’m using to generated SDP file from VLC is :

vlc -vvv -I rc dshow:// :dshow-vdev="Decklink Video Capture" :dshow-adev="Decklink Audio Capture" :dshow-caching=2000 :dshow-chroma=UYVY :dshow-fps=25 --sout #duplicate{dst=display},dst={transcode{width=320,venc=x264{keyint=50,level=3.0,profile=baseline,nocabac,me=umh,merange=26,subme=10,vbv-maxrate=180,vbv-bufsize=1000,vbv-init=0.9,qpstep=2}vcodec=x264,vb=150,scale=1,acodec=mp4a,ab=56,channels=2,samplerate=32000,audio-sync}:rtp{port-video=40002,port-audio=40004,dst=192.92.99.54,sdp=file:///%WMSCONFIG_HOME%/content/vlc.sdp}}}

It show the output, but is not generating any .sdp file in wowza content folder.

Is there any other way to give the blackmagic decklink capture stream to the wowza server.

Thanks,

Ajitpal Singh

[Richard_Lanham]

First, you can use this method, but if Wowza is remote you should write the .sdp locally then copy it to the Wowza content folder, is the easiest way.

Also, there is an updated and preferable way to do this with VLC that does not involve .sdp files:

https://www.wowza.com/docs/how-to-use-vlc-as-a-live-stream-encoder-with-wowza-media-server-mpeg-ts)

Richard

[Ian_Beyer]

Andy,

It’s kind of out of the scope of Wowza proper, but my experience with decklinks is that they just plain work. The only time I’ve had a hardware problem with them is in a few specific Dell Optiplex machines.

My suggestion would be to try and stream it with another program like Wirecast or FMLE - if those work, you can eliminate the hardware as a problem.

For capturing desktops, you could use a combination of WireCast and their Desktop Presenter add-on, or something like XSplit, which is commonly used by gamers to stream their gaming sessions.

For testing purposes, the demo version of wirecast should do the trick for you: http://get.esellerate.net/get/est.aspx?est=8L8W97J4KFZP&at= (Windows version)

XSplit is at http://www.xsplit.com/, and the latest release specifically addresses the Intensity Shuttle, so I’d imagine there’s good BlackMagic support there.

[Roman_Pekarek]

ajitpals : do you succesfully using Declink Card with VLC ?

[Roman_Pekarek]

Wow … I found this article : https://88.191.250.119/viewtopic.php?f=4&t=90279 … And found that Declink works with VLC for PAL :

"C:\Program Files\VideoLAN\VLC\vlc.exe" dshow:// :dshow-vdev="Decklink Video Capture" :decklink-caching=100 :dshow-caching=1000 :decklink-mode=pal :dshow-chroma=UYVY :dshow-fps=25

[Andre_Smit]

(Using Intensity Pro and VLC)

I tried that and unfortunately I can’t get it to work. At the moment I am just trying to test by capture my desktop and stream it with VLC over network.

Setup for Black magic Control panel:

Set Output: HDMI & Components

Set Input: HDMI Video & HDMI Audio

Use video setup in NTSC: At 7.5 IRE for use in USA

[x] Remove field jitter when video is paused

Select output processing: HD to SD Letterbox

select output processing: Off

I have also set the output from the computer to 25fps, interlaced.

If anyone has any advice, it would be much appreciated.

Are there any other program that is easy to use and requires minimal technical knowledge to do live streaming using the Intensity pro? - suggestions please