There are much better methods to do this! 😶 This app is a prototype, and intended to have readable code.
You must have ffmpeg and fpcalc installed. (On MacOS I suggest brew)
ScanAll.kt reads a directory tree for mp3 and m4a files,
and produces a CRC from the uncompressed first 60 seconds of audio
and a raw chromaprint,
saving the results to audio_scan.tsv.
These CRCs are used to find perfectly identical music after ignoring the Tags. CRCs will not work with the same song compressed twice, or for songs compressed at two different bitrates.
The chromaprint is used to find audio distances, and a bit xor distance of < 8 is increasingly likely to be a duplicate.
FindDup.kt lists out likely duplicates.
All parts use kotlin flows with coroutines to perform operations in parallel and should use all cores.
- Non-hardcoded music folders
- Pick the "better" file to keep and delete the leftover
- Store chromaprints using default instead of raw
- Lookup songs: https://github.com/macmanmatty/Dominate7th/blob/master/src/sample/AcoustID/AcoustID.java#L15