Internal keying on DeckLink 4K Extreme outputs green/purple

Hello,
I've tested internal keying for lower third purposes with a Blackmagic DeckLink SDK 10.1.4 and tried sample GdiKeyer.exe (in the zip Blackmagic DeckLink SDK 10.1.4\Win\Samples\bin) on DeckLink 4K Extreme 6g using HDMI as input and output (in 1080i60 video mode).

The problem is that the output video turn in green/purple colors. I can't say if overlay color elements are corrects (seems yes)

What may be the problem ? config, drivers (using BMD 10.4.2 on Win7 64bit), SDK, hardware, else ?

here is the program output:

Code: Select all

GDI Keyer Sample Application

Found Blackmagic device: DeckLink 4K Extreme
HD Mode keying supported.
Input mode detection supported
VideoInputFrameArrived
Pixel format: 8BitYUV
Detected video mode: 1080i60 Height: 1080 Width: 1920
Signal flags: bmdDetectedVideoInputRGB444
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
VideoInputFrameArrived
Pixel format: 8BitYUV
Using video mode: 1080i60, width: 1920, height: 1080
Current key level: 0
Current key level: 60
Current key level: 120
Current key level: 180
Current key level: 240
Ramp up keying
Ramp down keying
Press Enter key to exit.

and resulting image

decklink.jpg (401.64 KiB) Viewed 1916 times

Same issue occurs using CasparCG with internal keying and placing lower thirds in overlay.

Thank You for support
Lorenzo

Hi Lorenzo,

Looks like you have a colour-space issue. Try switching your source between YUV and RGB.

Regards,

Dave.