Quote:
Originally Posted by SeeMoreDigital
And just to confuse matters further. There are two different enhancement layers.
MEL = 10-bit minimal enhancement layer (encoded at 2Mbps or below)
FEL = 12-bit full enhancement layer (encoded at 3Mbps or much, much higher)
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In MEL, YCbCr are all set to 0 in the EL file. It is used to insert the RPU. Bad design, they could have just inserted the RPU into the base layer for MEL instead of this dummy file. 500 kb is the peak recommended for MEL.
In FEL, it stores the delta from the decoded base layer and the original 16-bit TIFFs. (12-bit is derived from the 16-bit TIFF) Dolby recommends 8 Mbps avg and 15 Mbps peak for FEL.
You can encode the base and EL with x265, I have. And then you use either Dolby Encoding Engine (DEE) or their SDK to do the rest. It is a multi step process.
The XML from Resolve is used in conjunction with the 16-bit TIFFs to generate an RPU binary file. The XML contains image statistics, trim pass and aspect ratio information. Additional metadata is pulled from the TIFFs.