I just ran a series of tests on Mac OSX, Resolve 14b8.
I used a clip of accurate rec709 EBU colour bars in 1080P as a source file.
Resolve project set at 1080P.
Rendered out as HD 1080P Prores, and also SD 720x576 Prores & SD 720x576 AVID codec in MXF file.
Using Resolve only, I did an import of the rendered clips and checked scopes on both HD & SD timelines.
All clips showed correct bars with no issues.
My conclusion: Resolve accurately determines colour space transforms from the source file format.
Output rendering transforms are also based on output format selected.
Imported into FCPX and used both internal and external scopes with BMD mini-monitor output.
Using the Prores files:
FCPX projects (timelines) set at HD 1080P and SD 720x576.
FCPX set at SD 720x576 resulted in inaccurate bars for the SD clip.
FCPX set at HD 1080P resulted in inaccurate bars for the SD clip.
Inspector showed SD clip as rec709, which is incorrect.
Did the same test with SD AVID MXF bars.
FCPX set to HD or SD resulted in perfect bars with no issues.
Inspector showed SD clip as rec601, which is correct.
Final conclusion:
Some applications and playback software interpret Prores files as rec709 by default even if they are encoded as rec601. This can be misleading as the file data itself is correct.
Resolve correctly applies the appropriate colour space conversion based on the file format and encoding.
It is possible that some other formats are not interpreted correctly, as I did not test every available format.
What IS important is that you test your workflow, formats etc. and do not assume anything. Just because there is no visible transform setting or plugin does not mean there is an issue.
Andrew Kolakowski wrote:Here is simple task as NLE.
I will give you Rec.709 HD master and ask you just to make me accurate SD Rec.601 version which will go to broadcast. Good luck doing it manually
Resolve will do this as a standard part of the output to a different format. No need to manually do anything!