i saw this a while back but was hoping Roku would fix instead, also i'm a programming too 🙂 . I just tried it the cmd seemed to work fine. I took a copy of my video file before hand to have an original.
The file is being analyzed.
The changes are written to the file.
and tested in my Roku 4800x and still same red tint issue.
Also, something i found weird, so we now live in 2 different states, so in our home where the plex server is , that is where i have the issue of red tint on this video and some others, it's a Samsung QLED 4k HDR 85 inch TV with a Roku 4800X 4k Ultra... in the other state where we have a 2nd home i have an LG OLED 65 inch 4k HDR TV with same Roku 4800X 4k Ultra.. when i play this same video file on the LG and 4800 , remotely, guess what there is no red tint !!! 🙂 , my assumption is that plex is doing some re-transcoding or what not since I'm watching the video remotely , remember the plex server is at our home in another state.. but when ever i try and watch the video "locally" in my home on the Samsung TV and Roku 4800 it has the Red tint.. this is puzzling..
never the less this running the cmd to alter the mkv as you mentioned didn't help me, i'm up for any other ideas as this point 🙂 ? it's a PIA to have to spend time fixing mkv files but if i find something that can fix mine i will be willing to do it at this point.