The BlackHole image is an antique and really belongs in a museum. There is little support for usb tuners or devices in BlackHole, plus the image has other problems when used in North America.

Installing TBS devices in any image will depend on the kernel, and if the kernel has been patched or updated. Installing TBS from the terminal is possible, but it will not work unless the kernel has been modified for it.

The pixelation issue might be solved by getting the drivers from BlackHole and installing them in another image. Really would help to see some screen captures or even a short video of the problem.