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moon2CUTE

pixijs-intro-example (falling leaves 🍂)

URL: https://onetrickwolf.github.io/pixijs-intro-falling-leaves/ (optimized for desktop Chrome 75+ for now, some issues on Firefox and mobile)

This is my first attempt at an intro stream for a Twitch stream largely made to test gif-to-webm-please out.

Currently allows 2 emotes max per message and supports all Twitch and BTTV emotes.

debug can be set as a query parameter to show performance stats and channel=twitch_username can be set to override the default channel (currently https://www.twitch.tv/moonmoon).

Example: https://onetrickwolf.github.io/pixijs-intro-example/?debug&channel=onetrickwolf

Motivation

Trying to set up a pipeline for Twitch emote integration with PixiJS as I would like to use PixiJS as a game engine for Twitch game jams. I previously made a game jam game for MoonJam 2021 but could not support animated emotes or emotes from BTTV. Also the existing solutions used by existing moonmoon intro screens and twitch-chat-emotes had some issues for PixiJS.

Also was just interested in learning how to do this as well as am genuinely interested in creating some stream intros or integrations!

External Dependencies

Uses https://gif-emotes.opl.io/ from twitch-chat-emotes to grab BTTV JSON.

Uses a deployed AWS Lambda of gif-to-webm-please to convert animated emotes.

catJAM Example:

https://y6ev4yhjw1.execute-api.us-east-1.amazonaws.com/dev?gif=https://cdn.betterttv.net/emote/5f1b0186cf6d2144653d2970/2x

Roadmap

  • Make some more interesting intro screens now that I have the basics down
  • Eventually turn temporary lambda into more of a real API with a real domain.
  • Add more configurations:
    • Change or remove background
    • Adjust amount of leaves or leaf images
    • Add some debugging controls
    • Number of emotes allowed
    • Special configs based on subscriber status similar to twitch-chat-emotes
  • Would like to eventually implemented this with FFmpeg WASM as well so conversion can be done completely in browser. FFmpeh WASM only works with Chromium 79 and above though and OBS is currently still on Chromium 75.
  • Potentially make common library or contribute to twitch-chat-emotes
  • Performance tweaks, currently GSAP as a Tween engine seems to be the cause of performance issues not sure why...

Known Issues

  • In Chrome and some other browsers the animated emotes will not play unless you interact with the screen first (just clicking anywhere is enough). If the animated emotes are frozen you'll need to refresh and click somewhere before the emotes start to appear. This is not an issue in OBS but I will probably add something that forces users to interact first if a non-OBS browser is detected. FYI this is an intentional feature of browsers to prevent autoplaying videos, there's not really anything I can do to fix it other than adding forced interaction.
  • In Firefox video textures will flicker, this seems to be an issue with pixi not sure if I will patch this since the intended target is OBS Chrome: pixijs/pixijs#4089

More Resources

If you'd like to make a stream intro (especially a 3D one) I'd highly recommend moonmoon intro screens and twitch-chat-emotes.

I'll be continuing to develop these methods and standardize them but I don't consider this example quite as developed or stable as the existing stream intros.

Credits