And even if he uses a Decklink card to connect the monitor, the disparity between the monitor's Rec 709 and sRGB settings will still remain. But it doesn't explain what was going on with the OP's setup nor does it answer his question about why his monitor is showing such a huge difference between Rec 709 and sRGB. Yes, if you remove OS, program and monitor profiles from the equation, which using an external calibrated monitor and BOB does, then you eliminate all of those things. What I am saying is that the cause of playback not being what's expected can be a MULTITUDE of things. Telling the OP that he can determine the cause of the discrepancies he is seeing without first having a solid reference image on an external monitor from which to make comparisons is simply sending him off on a fools errand.I'm not telling him that he should grade w/o an external monitor connected to card or breakout box. No colorist would spend thousands of dollars on i/o cards and reference monitors if they weren't absolutely necessary. Some people just don't want to hear this, so they stick their fingers in their ears and pretend that it's possible to grade directly in the GUI on cheap computer monitors. Run SDI out to a calibrated monitor so that you can first be certain that your signal is right, then you've got a reference from which you can try to determine why your rendered grade looks different on different screens. That's why the first answer to the question is simple: Don't grade in the GUI. It could be a million different things IF you're grading in the GUI. PeterMoretti wrote:The answer can actually be a bunch of different things. I’ve read a lot of forums and people always seem to say they there isn’t really a difference so when I saw one I thought I’d throw it out there. Yea the file never changes just my view of the grade. My philosophy is to grade for the discriminating consumer, and reward that consumer who HAS taken the time to set everything up properly. You could also just split the difference, knowing that the blacks will be a little crushed on one and a little lifted on the other.įWIW, I think the industry standard is moving toward BT.1886, which is close to 2.4, so you might just grade to that, and take comfort knowing that you can’t control exhibition out in the world, once it’s released.

There’s no way for the same file to change gammas depending on what device it’s on. Seth Goldin wrote:As I understand it, the gamma is exactly what’s different between sRGB and Rec.

Srgb to rec 709 external lut box