Add waveform overview as possible library column

[mixxxbot]

Reported by: ywwg
Date: 2015-08-24T18:12:24Z
Status: Confirmed
Importance: Wishlist
Launchpad Issue: lp1488207
Tags: library, waveform

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It would be nice to see an RGB waveform overview as a library column, like cover art. We could reuse most of the coverart code and use the waveform generator code to generate a small png file.

[mixxxbot]

Commented by: esbrandt
Date: 2015-11-27T13:24:29Z

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I`d like to see that too, but according to a previous discussion, it was kinda dismissed.
See https://bugs.launchpad.net/mixxx/+bug/1074392

[mixxxbot]

Commented by: ywwg
Date: 2018-10-20T15:53:51Z

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Resurrecting this, because I know other DJ apps have this feature. Our RGB overviews would translate well for this purpose, and we already have a cover art column so it shouldn't be too hard to implement.

[mixxxbot]

Commented by: Be-ing
Date: 2018-10-20T18:01:21Z

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I think this is a nice idea. I am questioning how it would perform when scrolling in the library table. Prerendering PNGs would help, but it could also use a lot of storage space and won't resize smoothly.

[mixxxbot]

Commented by: ronso0
Date: 2019-04-28T21:57:20Z

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Will a real waveform realy be helpful in the tracks table?
I mean, can the amplitude be recognized or should we use something simpler like a moodbar
http://en.wikipedia.org/wiki/Moodbar
lp:1074392

[mixxxbot]

Commented by: Be-ing
Date: 2019-10-15T04:41:15Z

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I saw a DJ using this with Rekordbox the other day and thought it would be really helpful. Rekordbox also shows the cue points in this overview. Here is a screenshot: https://rekordbox.com/assets/img/function/func_dj_4deck_h.png

[mixxxbot]

Commented by: Be-ing
Date: 2020-05-13T01:00:54Z

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Here is a video tutorial about this feature in Rekordbox:
https://www.youtube.com/watch?v=xurbCv8XKM0
This would be super useful. I think we should replace the current preview deck GUI with this.

[mixxxbot]

Commented by: Holzhaus
Date: 2020-10-18T00:17:18Z

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This would be really nice. It's also a feature in Denon Engine Prime AFAIK.

[whanake-music]

Have there been any updates to this issue? Would also love to see this in Mixxx. I think even Serato has this feature now

[daschuer]

No progress yet. However the building blocks are there. It can be implemented by duplicating parts of the cover art logic.

[hrflni]

I think this is useful, at least the spectrum can show fluctuations in high, medium, and low frequencies.

[ywwg]

bumping this because I would really like to see it :)

@daschuer how are the overviews stored now? Not as bitmaps I assume... so we would have to have some sort of renderer that can load the overview and render it in a QTable

[ronso0]

You might take a look at the overview draw functions I moved in #13273