waveform does not update if music files are modified

[Arthur Avila]

OS: Ubuntu 13.10
edited mp3 file using Audacity
Mixxx v 1.11.0 build r3863

Processor: Intel Core i3-2350M CPU @ 2.30GHz x4
Graphics: Intel Sandybridge Mobile x86/MMX/SSE2
RAM: 5.8 GiB

I edited some music files in my library to remove long silence periods in the begining and the end of the songs. Everything else in the file was kept the same, including mp3 tags and file name and location. Mixxx recognizes it as the old file and keeps the original information of BPM and play count, but it also keeps the old waveform and I can't reset it when I reload the music metadata or ask Mixxx to analyze it again.

Step by step:
1: add music to the library
2: analyze music or load it for waveform
3: edit music file with Audacity, and overwrite the file without changing any metadata
4: Mixxx fails to create a new waveform

[RJ Skerry-Ryan (rryan)]

Related:

Bug #1298212
Bug #1204164

[Owen Williams (ywwg)]

This can be really painful because the beatgrid gets all messed up.

[ronso0 (ronso0)]

Fixed. https://github.com/mixxxdj/mixxx/pull/1197 introduced a "Clear Waveform" action to track context menu.

[Daniel Schürmann (daschuer)]

Unfortunately https://github.com/mixxxdj/mixxx/pull/1197 is only a band aid that allows to repair the situation when noticed. The real annoying issue here is, that it might be not noticed and you may mess up your Mixxx because of that.

This can be solved by doing some plausibility checks on the waveform and discard it automatically if it does not fit to the track any more. Without having this in place I like to keep this bug open.

[Dale (dj-kaza)]

How about a quick filesize or track-length check? If the size has changed you know the waveform has been edited externally and will need to be/automatically re-analysed.

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/7398