My issue is not what the container format could be but what the actual data is within it. So a ProRes file might report as being 10bits but the actual image inside could be using only 8 bits of that.
So it was a question of calculating the bit depth based on content. Is there a node to change bit depth for effect? i.e. take a 32 bit float and truncate it to 8 bits. I could use that and a difference to check the file against it's 32 bit source (which i have) many thanks Paul
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