Troubleshooting a black preview screen with video input
I'm attempting to record video from a camcorder via a Blackmagic DeckLink capture card. Blackmagic provides a WDM driver, so both inputs of the device (and all supported resolutions) are recognized when using 'imaqtool'. However, previews of the video stream, as well as snapshots captured by 'getsnapshot', are completely black.
I read a question that suggested the issue could be related to the bit-depth of the camcorder I'm using (e.g., that matlab is expecting 8- or 16-bit input, whereas the camera is supplying 12-bit data). Unfortunately, I can't find any information about the bit depth of my camcorder. It's a Bell and Howell DNV6HD. Also, the video feed works fine with Blackmagic's provided software, so the actual capture card is working as it should.
Any troubleshooting tips would be greatly appreciated, thanks!