Hi, I have 2 questions that I can't get my head around. If someone could point me in the right direction I'd appreciate it.

I need to generate a visual waveform as a texture. I see there's an AudioStreamPreviewGenerator class but is this available in GDScript 4? There's a Github project here that's basically just a copy of the Godot code with the added bind functions to make it accessible in GDScript via a custom module. It's been inactive for over a year so I was going to update it for Godot 4 myself, but that leads me to question 2.

The example script from that project draws to a ColorRect. Most shaders I've seen also do the same. Could someone please tell me how I can convert a ColorRect to a texture so I can use it on a 3D object? Just FYI, I'm working on a VR project so using 2D overlay isn't an option.

  • I noticed that there's multiple updates as the preview is generated, which isn't great when your creating a texture from the end result, so I added a preview_complete to the module that only gets fired once.

    This is the script to produce the texture that I needed.

    And the texture on a simple plane.

So, I wrote a module almost exactly the same as the github project I mentioned and I now have a something that works pretty well.

I realise now that ColorRect is basically just a canvas so it's not possible to convert it to a texture. What I should try is drawing the waveform to an Image and then create a TextureImage from that. I'm sure that's how it's supposed to be done.

Here's the ColorRect script that produces the waveform.

I noticed that there's multiple updates as the preview is generated, which isn't great when your creating a texture from the end result, so I added a preview_complete to the module that only gets fired once.

This is the script to produce the texture that I needed.

And the texture on a simple plane.

a year later

fig2k4 brugh, how do i use this?? I need this for the app im working on

    8 days later

    i figured it out, thanks for the help.

    Thanks to the pukeman repo, wich does similar thing, https://github.com/v-pukman-gd/godot-audio-waveform-module has more information

    Basically what i did on binbows:
    Following the guide: https://docs.godotengine.org/en/stable/contributing/development/compiling/compiling_for_windows.html

    They list many items you need, but all you need is to install scoop and the rest is just a one liner.

    https://scoop.sh/

    After you install it, clone godot repo following the guide: https://docs.godotengine.org/en/stable/contributing/development/compiling/getting_source.html#doc-getting-source
    or
    git clone https://github.com/godotengine/godot.git

    Then clone figmans repo:
    git clone https://github.com/DerekL0576/godot-audio-stream-preview-module.git

    Copy from figmans repo directory godot-audio-stream-preview-module/audio_stream_preview_generator into godot repo dir: godot/modules
    so that the complete path in godot dir looks like this godot/modules/audio_stream_preview_generator

    Open terminal inside godot dir and type:
    scons platform=windows

    And it will start "compiling"

    On DDR5 5600 ram i7-14700k it took about 10-15GB of ram usage and more than 5 and less than 10 minutes to compile.

    Once its done in the godot repo directory will be a new dir named bin. This dir contains .exe files.

    BTW, the latest build already has jolt built in, you just need to select it:

    Not sure who is dummy