problem of quality with H264 encoding compressor
I would like to create a blu-ray (HD format) from FCP X. The original movie in FCP is a 4K format.
I use Compressor to create a DVD (.img file that I burn to a blu-ray in a second step). I choose the best quality for each parameter.
However, I have some problems of quality... The frontmost content of the picture is of very good quality, but the background (especially if there are lots of details) is not good at all. Indeed, the quality fluctuates. It is good, then tends to degrade during less than 1 second, then becomes good again... and so on. So we have a feeling of flickering in the background.
Any idea to fix my problem ?
Many thanks.
iMac (Retina 5K, 27-inch, 2017), iOS 10.3.3