Some mkv files cause completely pink screen

Sure - I absolutely will contribute as good as I can to further investigate the problem. So is there a parameter / guide for the DD command ?

To give you an idea… since the forum will limit us.

dd will just take a raw snip , as big as we want.

With a 4K video, the challenge is going to be:
How long until the pink screen is seen -VS- How big is the resultant sample file.

dd is pretty simple

dd  if=Input_file_name.ext   of=Output_file_name.ext  bs=1M   count=Number_of_1MB_blocks_we_want

If you have 60 GB files for 2hr movies, that’s 500 MB / minute.

See how this gets tricky really quickly?

What can you tell me about the file you have? size?

google search dd examples will show you a great deal

I did the dd command - can I send it to you via PN?