Michael D writes –
And I interpreted the description as similar to a very subtle green tint the analog component out of my DeckLink Pro card exhibits. The colors are not strange but there is a very subtle green tint most noticeable on black and white files using the component out and essentially undetectable on color files using the composite out.
The subtle green tint in my system, in my opinion, is a function of a problem with the card and/or the drivers.
REPLY – the ONLY way to tell what the problem is with your system is by using a component waveform monitor, to observe the levels. You have not specified what monitor you are using, but EVERY Sony PVM 14M2U, 14M4U, 20M2U and PVM-20M4U was MISALIGED at the factory, and every one of these monitors had the “black bias alignment” incorrectly done, so that if you simply selected “component” on these monitors, it would appear that there was green in the blacks. I addressed this issue with Sony Broadcast in New Jersey years ago, after checking my old AVID system and Beta VTR with a Leader 5100D waveform monitor (and getting the green tint in the blacks, from multiple monitors), and Sony’s response at the time was “if you want a truly critical monitor, you should purchase the BVM series”. Now, I am not saying that you don’t have a problem with your BMD card, but it’s pretty unlikely – and it’s pretty likely that the component input and the setup of your monitor is incorrect.
You can take a source tape from your Beta VTR, and stick its YRB output directly into the monitor – observe it’s color (in component), and then pass this same signal thru the BMD card, and observe the output of the card in analog component. Simply putting up “known histograms” proves nothing.
Ultimately you will need a component waveform monitor to resolve these issues. Even the output of your Beta VTR can drift in alignment – its all analog circuitry, and has single turn potentiometers inside it to align the YRB levels – very easy for drift to occur. Blame this before blaming the all digital BMD card.
Bob Zelin