elsampsa/websocket-mse-demo 项目介绍：
It this demo we're streaming live video from an RTSP camera to your HTML5 browser.
Video is streamed as H264 encapsulated in MP4. No transcoding takes place in the stream-to-browser pipeline. No browser-side flash or pure-javascript decoders required.
Video is decoded and presented in the browser using the W3 Media Source Extensions that is well supported by all major browsers by > now.
Only H264 is supported - browser MSE's do not support H246 yet (and neither does libValkka).
实现了浏览器 MSE (Media Source Extensions) 播放相机 RTSP (Real Time Streaming Protocol) 流。动手体验一下咯~
准备
# 系统 Ubuntu 18
# 如有 conda 虚拟环境，请停用
# conda deactivate
# 获取代码
git clone --depth 1 https://github.com/elsampsa/websocket-mse-demo.git
# 安装 libValkka
sudo apt-add-repository ppa:sampsa-riikonen/valkka
sudo apt-get update
sudo apt-get install valkka
# 安装 nginx
sudo apt-get install nginx
# 安装 python websockets
pip3 install websockets
# 准备 nginx 用户权限
sudo addgroup nginx
sudo adduser $USER nginx
sudo chgrp -R nginx /var/lib/nginx /var/log/nginx
sudo chmod -R g+r+w+x /var/lib/nginx /var/log/nginx
# 切换用户组
newgrp nginx
id
# 测试 nginx 工作是否正常（无 Permission denied）
cd websocket-mse-demo
nginx -p $PWD -c ./nginx.conf -g 'error_log error.log warn;'
# 设置相机发送 H264（该项目只支持 H264）
使用
发送 RTSP 流：
sudo snap install vlc
# allow camera permission
snap connect vlc:camera :camera
# 发送 ~/Videos/test.mp4 文件（循环）
# https://archive.org/download/archive-video-files/test.mp4
vlc file:///$HOME/Videos/test.mp4 --loop \
--sout '#gather:transcode{vcodec=h264}:rtp{sdp=rtsp://:8554/test}' \
--network-caching=1500 --sout-all --sout-keep
# 或，发送 /dev/video0 webcam（实时）
vlc v4l2:///dev/video0:chroma=yuyv:width=640:height=480:fps=30 \
--sout '#transcode{vcodec=h264,width=640,height=480}:rtp{sdp=rtsp://:8554/test}'
# 测试接收 RTSP 流
vlc rtsp://127.0.0.1:8554/test
启动程序：
killall -9 nginx
python3 ws_serve_new.py rtsp://127.0.0.1:8554/test
image
打开浏览器：
xdg-open http://localhost:8089
image
更多
技术：
- WebSocket
- MediaSource: 构建媒体流，供 video/audio 元素播放
- WebRTC: 可直接捕获客户端视频流，并点对点传输、不依赖服务器中转
- WebCodecs: 编解码音视频
- WebAssembly: C/C++/Rust 等编译进前端使用
项目：
- MSE: 需构建流，通常容器格式是 ISO BMFF (Fragmented MP4) = fMP4
- elsampsa/websocket-mse-demo: RTSP > fMP4
- ChihChengYang/wfs.js: H.264 NAL > fMP4
- bilibili/flv.js: FLV > fMP4
- Garefield/RTSP-WS-Proxy: RTSP > fMP4
- Streamedian/html5_rtsp_player: RTSP > fMP4, Proxy 收费
- JS 解码
- phoboslab/jsmpeg: MPEG1 Video & MP2 Audio Decoder
- mbebenita/Broadway: H.264 decoder
- Wasm 解码
- sonysuqin/WasmVideoPlayer: H265 > YUV, WebGL
- wupeng-engineer/decoder_wasm: H264,H265 > YUV, WebGL
- gliese1337/h264decoder: H264 > YUV
- mattdesl/mp4-h264: H264 > YUV/RGB
- mattdesl/mp4-wasm: H264
- 其他
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