The decision of how to compress each channel is an implicit thing internal to the openexr lib currently.
There isn't a method to test how a channel will be handled, but the logic is basically: If the channel name (not the layer name) is R, G, B, Y, YR, or YB, it will be lossy compressed. If the channel name is A, it will have a lossless method that works reasonably with alpha. And otherwise, its basically zip compressed. Hope that helps! Karl On Wednesday, October 12, 2016, kiran nani <nanikiran2...@gmail.com> wrote: > Hello all, > Sorry for this new noob question. I heard DWAA compressor, automatically > does compression based on channel name. I have an output file but can't > list it's compression type for each channel individually.I have checked in > nuke It's listing overall file compression type. > Is there any tool available to list it individually per channel? > Thankyou. > > Regards, > Kiran.B > . > >
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