Is there a list of manuacturers/suppliers of video capture cards that support openml?

Or... is there anyone we should contact in Khronos, or other organisation for advice.

The company I work for is developing a system which needs to capture video, and render it in opengl.
While open ML seems a good bet in terms of software, it doesn't seem to have been adopted by video capture manufacturers.

We have chosen a good capture board to start development, but it doesn't support open ML.