Okay, ether I´m missing something here or this is a real bummer. But from my first tests, it looks like the AVCHD codec of the Sony FS100 holds up better in color grading than anything else.
Here is what I did.
This is the original material, straight from the card, in glorious AVCHD, out of the FS100
Here is the same material – converted to Cineform (Film) and graded, to se how much detail I can recover in the blown highlights.
Here comes the same file, converted to Black Magic cocec uncompressed, 8 Bit YUV, 10 Bit YUV and 10 Bit RGB. All are graded with exactly the same settings.
Now here comes the interesting bit. This is the original AVCHD file, graded with the exact same settings:
I couldn’t believe what I saw. This turns a lot, of what I know about codecs upside down.
Maaybe David from Cineform want´s to chime in here – I have no idea,what´s going on.
UPDATE: For the record: I just tried Avid´s DNXHD – results are exactly the same as with Cineform or the BM codecs.