Questions about Sega Scope interlacing

First of all I had to get an analog capture card to USB because all the digital cards seem to take interlaced TV and turn it into progressiveized.

Also I had to use composite because by default RGB when ran through scart supposedly uses 240p.

I seen that that's the only way I could get an interlaced input directly into my Macintosh is by using one of those analog capture cards with composites S-Video and two audios.

I don't know whether it's a frame rate issue or whether it's something else but when I go to the interlace menu, I'm looking For left eyes only and right eyes only. I don't know which filter I should use to get the exact left eye as one frame and the exact right eye as the other. There was something called disable and there's something called discard. What's the difference between those two.

Also what is the exact frame rate of an ntsc TV, if it it were in Master System interlaced mode?

I would do scart RGB, because that looks really clear and separated on there but there is no way in OBS to grab either alternate frames of 60 HZ or because it's natively progressive being able to interlace between those two fields.

First thing I'm trying to do is get one eye correct in color and then monochromise it for black and white by desaturating the color 100% And overlaying the left eye as black and red over the right eye as black and cyan.

I think my timing is not exactly right. I don't know what the exact ratio of frames per second is. I know it's some weird whole number ratio, but I don't know what it is for the Master System which in order to separate has to be interlaced.

I know my Sega 3D glasses look good in both inter lakes and progressive mode but unfortunately on progressive mode within obs, there's no way to alternate frames.

It's the best picture looks like it's on 60 HZ done at 30 HZ by two eyes progressive, maybe you guys can add a function which could take odd frames and isolate them in one field and even frames and isolate them in the other.

I don't know what would be the exact frame rates you would need for half of whatever ntsc is. I know it's some weird odd decimal like 59.97 but that's as interlaced. I guess if I put that as the interlace frame rates and then take out the left half and right half respectively it should be fixed.

I'm going to try that and see if that works.
 
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