- Posts: 2
- Joined: Tue Aug 07, 2018 2:15 pm
- Real Name: Peter McEvoy
Hello,
we have just acquired a new Decklink 4K 12G extreme card and have managed to set it up. It can capture input via HDMI, both from a computer (10bitRGB) and a camera (8bitYUV) both @ 1080p50 and 1080p25.
Now, the card will be used to help with compositing graphics over the live video feed, ideally with low latency. As I understand it internal keying, which this card has, can help with making it fast. However, I can not seem to get keying to work.
I have tried the following:
With output HDMI from the Decklink card going to a separate screen.
Am I misinterpreting something, does the internal keyer not work as I imagined?
Does it perhaps not work when using the two HDMIs as both input and output?
Thank you very much for any help or pointers regarding this.
Kind Regards
Peter.
we have just acquired a new Decklink 4K 12G extreme card and have managed to set it up. It can capture input via HDMI, both from a computer (10bitRGB) and a camera (8bitYUV) both @ 1080p50 and 1080p25.
Now, the card will be used to help with compositing graphics over the live video feed, ideally with low latency. As I understand it internal keying, which this card has, can help with making it fast. However, I can not seem to get keying to work.
I have tried the following:
With output HDMI from the Decklink card going to a separate screen.
- Using the supplied LiveKey program. I pick an image to key (https://drive.google.com/open?id=1opBZ3 ... QBylIQZ7tU) and select the correct video format to what my input is sending (1080p50), set keying to internal and start to slide around with the keying slider. On the output screen I only see a static image of the key image, no feed from the camera.
- From the SDK GDIKeyer Sample, using both the precompiled and building my own (with keyer->Enable(true)). The program runs and detects the correct screen resolution, and then starts ramping up the key amount. However, again, on the output screen, only a static image of a test pattern is shown, no feed from the camera.
Am I misinterpreting something, does the internal keyer not work as I imagined?
Does it perhaps not work when using the two HDMIs as both input and output?
Thank you very much for any help or pointers regarding this.
Kind Regards
Peter.