Save MultiTrack in mp4

[giorgiacantisani]

Hi!

I would like to modify the audio files in MUSDB and then save them again in the .mp4 format.
How can I do this? I noticed that this feature is not currently implemented (see save_estimates function in musdb).

So far, I tried with stempeg.write_stems function (https://github.com/faroit/stempeg) but I don't understand how to include the metadata.

Thank you very much

[faroit]

Hi @giorgiacantisani I am actually working on an reimplementation of the writing function. For now you can just follow this PR

faroit/stempeg#28

If you can't wait, have a look at: https://github.com/sigsep/sigsep-mus-io/blob/master/scripts/encode.sh

How can I do this? I noticed that this feature is not currently implemented (see save_estimates function in musdb).

Once finished, would you say it makes sense to offer stems writing from musdb as well?

[giorgiacantisani]

Thank you very much for your suggestions!

I think it would definitely make sense. For example, in my case, I would like to modify the dataset and save again each MultiTrack object. In other cases, you may want to add some annotations or other metadata.

[faroit]

@giorgiacantisani stempeg 0.2.1 was just released and fully supports writing stems. how would you suggest to add this feature to musdb?

[giorgiacantisani]

Hi! I suggest adding a save method to the class Multitrack so that you can load the tracks, modify and save them easily using the same object.
What do you think?