摄像头插上就能用，不需要额外设置
网上很多教程是针对 Raspberry pi 4 和以前的，不太适用 5.
打开摄像头的串流后，显示器上会显示摄像头画面，这个有点神奇。我的树莓派是直接启动到命令行的。
在树霉派桌面环境输入 libcamera-hello 可以测试摄像头，摄像头画面会弹出几秒，然后退出
https://www.waveshare.com/wiki/RPi_Camera_(I)#libcamera-vid
libcamera-hello --list-cameras
Available cameras
-----------------
0 : ov5647 [2592x1944 10-bit GBRG] (/base/axi/pcie@120000/rp1/i2c@80000/ov5647@36)
Modes: 'SGBRG10_CSI2P' : 640x480 [30.00 fps - (65535, 65535)/65535x65535 crop]
1296x972 [30.00 fps - (65535, 65535)/65535x65535 crop]
1920x1080 [30.00 fps - (65535, 65535)/65535x65535 crop]
2592x1944 [30.00 fps - (65535, 65535)/65535x65535 crop]
从客户端连上串流后再退出， 串流服务也退出了， 所以要写一个循环让它一直跑
#!/bin/bash
while true; do
libcamera-vid -t 0 --width 1920 --height 1080 --inline --listen -o tcp://0.0.0.0:8000
sleep 1 # optional delay before restart
done
然后可以用 mpv 播放
mpv tcp://192.168.1.57:8000
我发现可以串流 udp, 但我发现 mpv 播放不了， vlc 也播放不了。
用 mpv 播放延时大概三秒。 我发现用 Websocket 在网页上播放延时只有大概1秒。看看这里 从这里抄来的 https://www.mkmark.net/blog/solution/raspberry-pi-libcamera-low-latency-http-streaming/
# 用 tmux 窗口打开
# 这样的话断开后就停了，要一下能开的话用上面的循环脚本
libcamera-vid -t 0 --width 1920 --height 1080 --inline --listen -o tcp://0.0.0.0:8000
# 用另一个 tmux 窗口打开
pip install websockify
websockify 0.0.0.0:8001 0.0.0.0:8000
有两条错误和一个警告，但不影响使用。
[0:20:12.003237414] [2143] ERROR IPAModule ipa_module.cpp:172 Symbol ipaModuleInfo not found
[0:20:12.003274894] [2143] ERROR IPAModule ipa_module.cpp:292 v4l2-compat.so: IPA module has no valid info
[0:20:12.003300930] [2143] INFO Camera camera_manager.cpp:313 libcamera v0.3.0+65-6ddd79b5
[0:20:12.011245417] [2148] INFO RPI pisp.cpp:695 libpisp version v1.0.6 b567f0455680 17-06-2024 (10:20:00)
[0:20:12.027920944] [2148] INFO RPI pisp.cpp:1154 Registered camera /base/axi/pcie@120000/rp1/i2c@80000/ov5647@36 to CFE device /dev/media0 and ISP device /dev/media1 using PiSP variant BCM2712_C0
Made DRM preview window
[0:20:12.183023637] [2143] WARN V4L2 v4l2_pixelformat.cpp:344 Unsupported V4L2 pixel format RPBP
Mode selection for 1920:1080:12:P
SGBRG10_CSI2P,640x480/0 - Score: 6093.33
SGBRG10_CSI2P,1296x972/0 - Score: 3797.33
SGBRG10_CSI2P,1920x1080/0 - Score: 1000
SGBRG10_CSI2P,2592x1944/0 - Score: 2717.33
Stream configuration adjusted
[0:20:12.183238743] [2143] INFO Camera camera.cpp:1183 configuring streams: (0) 1920x1080-YUV420 (1) 1920x1080-GBRG_PISP_COMP1
[0:20:12.183345574] [2148] INFO RPI pisp.cpp:1450 Sensor: /base/axi/pcie@120000/rp1/i2c@80000/ov5647@36 - Selected sensor format: 1920x1080-SGBRG10_1X10 - Selected CFE format: 1920x1080-PC1g
[libx264 @ 0x555634f382e0] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x555634f382e0] profile High, level 4.0, 4:2:0, 8-bit
Output #0, h264, to 'tcp://0.0.0.0:8000?listen=1':
Stream #0:0: Video: h264, yuv420p(tv, bt709), 1920x1080, q=2-31, 30 fps, 30 tbr, 1000k tbn<img src="https://fennng.visualstudio.com/1c50733b-7e60-4ef1-b705-ff7ee350693e/_apis/git/repositories/50c5e7af-75a8-4397-b510-cd219a2d0f8c/Items?path=/.attachments/image-946f17d7-cb4b-40a9-9fc2-689131d3a2cb.png&download=false&resolveLfs=true&%24format=octetStream&api-version=5.0-preview.1&sanitize=true&versionDescriptor.version=wikiMaster">然后写一个简单的网页
<head>
<meta name="color-scheme" content="dark">
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/jmuxer@2.0.4/dist/jmuxer.min.js"></script>
<style>
body{
margin: 0;
}
</style>
</head>
<body>
<div id="container" style="width: 100%; margin: 0 auto;">
<div class="vsc-controller"></div>
<video width="100%" autoplay muted id="player"></video>
</div>
<script>
function parse(data) {
var input = new Uint8Array(data),
video = input;
return {
video: video,
};
}
window.onload = function () {
var socketURL = document.location.href.replace('http', 'ws')+'ws/';
var socketURL = "ws://192.168.1.57:8001/ws/"
var jmuxer = new JMuxer({
node: 'player',
mode: 'video',
flushingTime: 0,
fps: 30,
debug: false
});
var ws = new WebSocket(socketURL);
ws.binaryType = 'arraybuffer';
ws.addEventListener('message', function (event) {
var data = parse(event.data);
jmuxer.feed(data);
});
}
</script>
</body>然后运行一个简单的 python web 服务器
python3 -m http.server --bind 0.0.0.0 --directory $(dirname $(realpath ./index.html)) 8080
然后在浏览器打开
