wechat_ai/demos/go-ffmpeg-wechat-stream/README.md

Go FFmpeg WeChat Stream Demo

Standalone demo: Go finds the visible WeChat window, starts FFmpeg avfoundation screen capture, crops to the WeChat window rectangle, and serves an MJPEG stream locally.

If FFmpeg screen capture does not produce frames, the demo automatically falls back to macOS window-only capture with screencapture -l <window_id>. This captures the WeChat window itself, so other windows covering it should not appear in the stream.

Run:

cd demos/go-ffmpeg-wechat-stream
go run .

Open:

http://127.0.0.1:8765/

Options:

go run . -input 3:none -fps 15 -port 8765 -open=true -wait=true

Notes:

• macOS only.
• Requires FFmpeg installed and available in PATH.
• Requires Screen Recording permission for the terminal/app running the demo.
• WeChat must be visible on screen.
• By default the demo waits until a visible WeChat window is found. Use -wait=false to fail immediately.
• FFmpeg avfoundation is screen-based, so crop mode can include windows covering WeChat. The fallback screencapture -l path is window-based and is closer to Tencent Meeting style app-window sharing.
• -input is the FFmpeg avfoundation screen device. List devices with:

ffmpeg -hide_banner -f avfoundation -list_devices true -i ""