From discussions with Lumagen it seems that some sources / content have "noisy" or "raised" bars, and perhaps the thresholds currently used by the algorithm for bar detection is lower than the level of the bars from some content / sources. I believe the bars presence has to be detected continuously for a certain amount of time before it locks in.Does anyone know why the auto aspect feature only works on some films? I can't seem to find a patter but many of my 2.35:1 movies aren't recognized by the feature.
It seems perhaps a relaxing of the threshold might help, but if it were that simple I guess it would be done already...!
AppleTV4k Netflix is terrible for this, though it has improved a bit in the most recent release.
I hope it improves further over the coming releases. I have the auto aspect detected ratios hooked up via a Raspberry Pi to my electric masks and it does irk me when it decides to jump out of 2.35:1 mode for no reason you can actually see on screen. Obviously the Radiance saw something it didn't like (the cases tend to be quite repeatable) - but it wasn't anything obvious so it is like there is a knife-edge the aspect decision is balancing on at the mo.
If you have specific examples please send them to Lumagen. They have been engaged with the Auto Aspect functionality recently and the more concrete examples they can have of content that trips it up the better it can get.