> Hmmm... I would really like to trace the extracted chd content back to its source. > > Please indulge me again: if I store a trurip disc in chd, and then extract it, am I > right in saying the sha1s of the cue and bin will not be the same as the source files > I added to the chd in the 1st instance? That's the crux for me. > > It looks like chd compression is irreversible?
It's reversible; for well-formed source CD inputs, -extractcd to the same format will give hash-matching binary data and semantically-matching metadata (cue/toc).
But getting full hash-matching everything back is unlikely; as Haze alluded to, for each .cue file, there are dozens of other .cue files which aren't perfect matches but ultimately create the same disc.
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