Early Version Video: How VGA Works
Added 2020-10-27 00:08:32 +0000 UTCHello, I am so sorry for how long it has been since my last video. This project has just been one thing after another with delays and things that pop up. This isn't a final version of this video but it's at least at watchable stage now. I need to add a lot of on screen text elements, a few images, and create an animated segment for the porch area around V Sync (that will make sense as you watch the video).
I didn't want to just re-iterate the exact same things about VGA and CRTs that I have mentioned multiple times before in videos so I figured before I did that again it was finally time to just do a dedicated video about how VGA works and what some of the challenges are with it. This is my attempt to document everything I can so I can just point back at this video for future projects and not have to repeat myself as much. So I'm putting more effort in than usual on it because I want it to be a good video for long term reference.
Pretty much all of this will be referenced in how I ended up solving VGA capture and will be needed for the next video. As soon as I have this one finished I'm going to start working on the script about capture because all of the troubleshooting is done and I should be ready to start on that one right away.
Comments
Can't wait to see the completed video! There's not much in the way of videos that really dig into VGA, and I have to admit it's something I've never taken the time to read enough about.
Xargos
2020-10-27 03:39:35 +0000 UTCIt's a video I made in Resolve that is constantly changing the hue of a standard SMTPE color bar test. It is also being viewed on the logic analyzer and you can see how the colors change on there.
Tech Tangents
2020-10-27 01:03:12 +0000 UTCIs the test pattern on the CRTs supposed to be correct, or is it supposed to be subtly changing? It's changing, so if that was not your intention, you may want to check your auto-exposure or auto-white-balance settings. (I saw this happen recording a plasma TV 15 years ago -- the overhead flickering fluorescents were confusing the auto-exposure/auto-temp of the camera)
Jim Leonard
2020-10-27 01:00:54 +0000 UTC
