Video demonstration (please watch, 18s): https://youtu.be/4HtkadKEnWM
When I reduce the brightness of the device, iOS seems to be changing white to off-white. For my use case, it is important that the view background is actually white so the video appears to seamlessly blend into the background. Interestingly, when I take a screenshot or screen recording this effect does not appear.
I am on light mode and don't have any custom color space settings.
Does anyone have any ideas on how to fix this? Thank you!
After communicating with Apple support, we discovered that the video_full_range_flag was not being set by ffmpeg. Re-encoding the videos using the following ffmpeg command worked: ffmpeg -i input.mp4 -map 0 -c copy -bsf:v h264_metadata=video_full_range_flag=1 output.mp4.