Originally Posted by bobof
I think you need to treat it like a problem of onion layers and work backwards. You don't say if you get the flashes without the Lumagen in circuit? If you want suggestions on how to set it up that might avoid the flashes you'll need to provide some more information:
1) exactly how is everything wired up?
2) define "do anything with my AVR" - as you say that causes green flashes? It it showing an OSD somewhere?
3) does it go away without the Lumagen in circuit?
4) If you play the content, what does the Lumagen UI say for input / output formats?
5) If you look at the UI, what does the Lumagen UI say for input / output formats?
6) Do you have genlock enabled for the inputs?
The above info would start to allow you to formulate an idea of things you could change to see if they affect the problem. I don't have any flashes, but I also have a JVC projector which blacks the screen for 10-15s. One thing I did early on with my JVC was disable the blue input background and corner display of HDMI input info as it made the presentation much cleaner - but those were both projector settings.
Have you contacted Lumagen support? They're very helpful and will have seen most issues before.
thanks for your response....
everything is very straightforward in terms of wiring, couldn't be simpler, atv4k into lumagen, out to pj (video) and avr (audio), genlock is set at default, haven't changed it.
it's become clear that it's an hdr handshake issue, happens with or without the lumagen in the loop, altho with the lumagen the handshakes are considerably longer as is the duration and intensity of the green flash (which fills the entire screen by the way).
disable hdr in the 4tv4k and everything is silky smooth.... i've tried every combo of hdr and sdr setting in the 4tv4k, matching on/off, and just about every lumagen input / output setting (fixed 60hz, color spaces, etc.), nothing mitigates the hdr issue.
it's either an epson pj issue or an hdmi cable issue, but given i've tried 3 different high quality certified 4k 18ghz cables and it was the same with all, i'm going to go with the epson... add to this lumagen warned me that epson hdmi inputs were a bit problematic when i informed lumagen that i had one on the way... if the epson blacked out the screen during these handshakes as the jvc does (i was told) instead of flashing green, it could be workable, but the constant green flashing whenever i start, stop, pause an hdr file is a real pain... i have a movie folder with about 30 hdr demo clips, very short in duration, that's a real treat to watch when set to play one after another, argh.
here's the thing, i could probably live with the issue, but pj hdr is so finicky i'm wondering if it's even worth it... every hdr title seems to respond entirely differently to the hdr settings, it's not even remotely close to a one size fits all proposition, for example i was testing "passengers" (hdr) and tweaked the hdr settings on the lumagen and pj a bit and got an absolutely stunning hdr picture, it's was very, very impressive, then tried i tried the "dark knight" (hdr) and a lot of it was blown out, then i tried "jurassic world" (hdr) and it was a completely new set of issues... that said, i could tweak the hdr setting for each title and get a stunning hdr picture, but who wants to do that every time they want to watch and hdr movie?
insult to injury, when i connect the same setup to my 60" lg oled 4k hdr tv, i.e. when i swap out the pj for the lg, everything works like a dream, especially hdr, silky smooth, no hint of green flashes, super quick handshakes, and the image is stunning, alas if i could only blow up the lg to 150"!
anyway, not sure where i'm going to go from here, non hdr movie files have been absolutely beautiful with the lumagen and epson, spectacular even, minus all of the handshake issues, maybe i'll just try that road for now, maybe even try some of these "harpervision" settings that reportedly ape hdr without enabling hdr.
off topic - does anyone know why paragraphs are double spacing when i post? this never used to happen, now i have to edit my posts in order to remove the double spacing.