Video support is still WIP, here is a TODO list, just to keep track. Feel free to comment stuffs

• Structure code
• Extract frames
• Add frames to project
• Link frames to an object (project.json)
• Reempack project into sb3

npm ERR! ERROR! [ffmpeg-cli] Error: Unable to download files
npm ERR! C:\MyStuff\scratchvideo-master\node_modules\adm-zip\zipFile.js:107
npm ERR! throw new Error(Utils.Errors.INVALID_FORMAT);

Audio support TODO list:

• Video support
• Extracting WAV with ffmpeg (and adding it to the project)
• Link WAV to an object (project.json)

I decided to keep track of the ID's problem in a separate issue, so here are some things I gathered from them

• They're all composed of 32 characters + the filename regardless of the type
• They're composed of random numbers and lowercase letters
• Even though upon inspecting Scratch's source code and seeing that they're generated based on object properties, the Scratch engine somehow does not care if I change random characters and data isn't lost

After some further investigation the issue may not be directly related to the ID system, it turns out scratch does give error details in the console. This is the result of a hand-crafted injected png file into an sb3:

{
  "validationError": "Could not parse as a valid SB2 or SB3 project.",
  "sb2Errors": [
    {
      "keyword": "required",
      "dataPath": "",
      "schemaPath": "#/required",
      "params": {
        "missingProperty": "objName"
      },
      "message": "should have required property 'objName'"
    }
  ],
  "sb3Errors": [
    {
      "keyword": "pattern",
      "dataPath": ".targets[1].costumes[2].assetId",
      "schemaPath": "#/definitions/assetId/pattern",
      "params": {
        "pattern": "^[a-fA-F0-9]{32}$"
      },
      "message": "should match pattern \"^[a-fA-F0-9]{32}$\""
    }
  ]
}

npm ERR! Error: Invalid or unsupported zip format. No END header found
npm ERR! at readMainHeader (C:\MyStuff\scratchvideo-master\node_modules\adm-zip\zipFile.js:107:10)
npm ERR! at new module.exports (C:\MyStuff\scratchvideo-master\node_modules\adm-zip\zipFile.js:19:3)
npm ERR! at new module.exports (C:\MyStuff\scratchvideo-master\node_modules\adm-zip\adm-zip.js:20:11)
npm ERR! at decompressZip (C:\MyStuff\scratchvideo-master\node_modules\ffmpeg-cli\lib\download.js:46:14)
npm ERR! at C:\MyStuff\scratchvideo-master\node_modules\ffmpeg-cli\lib\download.js:78:75
npm ERR! at processTicksAndRejections (node:internal/process/task_queues:96:5)

2022-07-27T03_02_35_647Z-debug-0.log