Use AccurateRip DB to verify individual tracks while ripping, keep temporary files until successful rip

[mtdcr]

Just an idea: Maybe a future version of whipper could fetch AccurateRip results for a disc before extracting tracks and, if present with high enough (user configurable?) confidence, verify each track with these checksums instead of reading each track twice and comparing two CRCs.

This may improve the ability to extract scratched tracks, because a) two identical CRCs don't reliably indicate lack of errors and b) if 50% of extractions have errors, you'll get a correct rip with an average of two reads with this technique, but - in the worst case - might never finish successfully when requiring two correct consecutive reads.

Maybe another less invasive way to improve the success rate would be to keep the result of each try on disk and compare CRCs of all tries, until two (or user configurable number of) files match. Or at least not throw away both results on a mismatch, but only the first one.