width and height with .json

[SaadArdati]

It seems the .json output is the same with or without a width and height, is this intentional?

[chrisn]

Yes, the --width and --height options only apply when creating PNG images. For JSON output you'll need to set the --zoom option (or --pixels-per-second).

[SaadArdati]

@chrisn I suppose the only way to do this is to average chunks of the data together to get 1 pair of channels to equal x amount of pixels for a specific width? That's disappointing. I'll close this issue and do that i suppose.

[chrisn]

The calculation you need to obtain the --zoom value for a given image width and audio duration is here. Rounding errors mean the resulting JSON isn't exactly the length you requested, but it'll be close.

[SaadArdati]

Thank you.

[SaadArdati]

@chrisn I was successful in using what you linked, however I actually do need it to be pixel perfect. What can I do?

[chrisn]

At the moment, only solution is to either truncate or pad the data to the desired length. You're not the first person to request this, see also #41, #104, #108.

[SaadArdati]

very odd. it should be the exact same formula as the png command but without the drawing part.. Hm..