Broadcat

Screen-Share A Browser Window From Your Desktop Into Minecraft!!!

Have everyone see your POV or Watch a Movie Together

Embed Removed: https://www.youtube-nocookie.com/embed/UFk0loiBNoc

No Second Monitor Needed

Watching

Projector Screen — Place it down and it will create a screen that is visible from 256 blocks away

• Right Click to make the screen bigger
• Shift Right Click to make the screen smaller

Full screen — press K

Corner preview — press J and turn it on. A small picture-in-picture while you keep playing

Sound

The stream carries whatever your computer is playing, and you hear it from the screens in the world: full volume up close, fading out as you walk away, silent past 48 blocks

Starting a stream

1. Press J for the Broadcat panel
2. If you want to stream a video: click Launch Browser
3. Choose your settings (Quality: low/medium are recommended)
4. Press Start streaming 😀

Everyone gets a chat message and can press K to watch.

IF STREAM WORKS BUT THE VIDEO IS PAUSED

This is due to your internet explorer that will not rendering the video if you are not looking at it

TO FIX THIS ISSUE

Press the Launch Browser and Look up the video and stream that one This browser is the exact same as any other, except it will continue to render that video

There is also an unbound Start / stop streaming key in Controls if you would rather go live without opening the panel.

Server operators get /broadcatadmin stop to cut off whoever is streaming, and /broadcatadmin bitrate <kB/s> to change the ceiling.

Chat commands

/broadcat                       what is going on right now
/broadcat windows               list open windows — click one to pick it
/broadcat window <text>         pick a window by part of its title
/broadcat start | stop          go live, or stop
/broadcat preset medium         quality: low / medium / high / max
/broadcat fps 15                how often frames are sent (up to 30)
/broadcat crop 0 90 0 0         trim pixels off the edges, e.g. the tab bar
/broadcat audio off | system    turn sound off, or capture what the speakers play
/broadcat volume 1.0            how loud streams are for you
/broadcat watch false           mute — stop the server sending you frames
/broadcat pip false             show the corner preview
/broadcat debug                 every stage of the pipeline, with counts
/broadcat audio microphone <mic name> stream with your mic

Settings live in config/broadcat.json and can be edited by hand.

Requirements

• Minecraft 26.2, Fabric Loader 0.19.3+, Fabric API, Java 25
• Install it on every client. Clients without it will not see the screens.
• Broadcasting requires Windows (it uses PrintWindow and WASAPI to capture a window and its sound without a second monitor). Watching works on any operating system — Mac and Linux players can see and hear streams normally, they just cannot start one.

No other mods needed, and nothing to install outside of Minecraft.

Credits

Bundles libjpeg-turbo 3.2.0 for fast JPEG decoding, unmodified, under its BSD-style licences — included in the jar beside the library. The JDK’s own decoder is five times slower and cannot decode at a reduced size, which is the difference between watching video and watching a slideshow.

Broadcat itself is MIT licensed.