A question working in blackmagic duo 2


#1

Hello,
I’m using output 4 in Duo2 like caspar output.
I’m using also inputs 2 and 3 .
when I play to output whith casper client someone of inputs in output starts with a black video during half second.
Any solution?
Thanks a lot.

Miquel.


#2

I believe that’s the time it takes for the decklink producer to initialize.
If you want to be able to play instantly you could start it on beforehand on a layer and set the opacity and volume to 0.
Then when you want to switch to it, just set the opacity and volume to 1 to get it to show.

Edit: Examples:
Run this before, to have the input “stand by”:

MIXER 1-10 VOLUME 0
MIXER 1-10 OPACITY 0
PLAY 1-10 DECKLINK DEVICE 2 FORMAT 720p5000

Then to show the decklink:

MIXER 1-10 VOLUME 1
MIXER 1-10 OPACITY 1

#3

Use the “Opacity” command to make the layer transparent and then play the input. After a few seconds fade the layer up. You can also use the “Volume” command to mute the audio when needed.


#4

Great minds think alike @didikunz :wink:

Another way to do it is to run the decklink producer on a separate channel and then route it in when you need it.
Example:
Start the decklink producer on secondary channel:

 PLAY 2-10 DECKLINK DEVICE 2 FORMAT 720p5000

Route that layer on to first channel

 PLAY 1-10 route://2-10

#5

Yes, but the routing uses more system resources that the Opacity I guess.


#6

It should be enough to do a LOADBG, then a PLAY. Decklinks in the background produce frames like normal, so as long as there is enough time between the commands it will skip the black section


#7

True. - I used this workflow, when I needed to often hide and re-show the input, as after a while it did not played any more. By just let it play and animate it out and back in it worked much better.


#8

Hello, thans for yours answers, but how to apply solutions in casparcg client?


#9

hello, it works fine, thanks a lot.