我只想制作像OBS这样的程序。
我的理想代码行为是在Node.js中创建一个子进程并执行FFMPEG命令，以将网络摄像头流发送到yourtube实时RTMP服务器。但是，实际行为是由node.js中使用的child-process-promise模块中的错误引起的。
我已经检查了几个问题，但是我没有足够的经验来理解它们，我希望有一个明确的解决方案。
我想那是因为我在Node环境中找不到FFMPEG的命令地址。还是从套接字环境调用是一个问题？
我检查了FFMPEG命令是否可以在Windows提示环境中使用。
※注意：FFMPEG环境变量已注册。
环境：Window10，node.js，ffmpeg
代码利用了一个简单的WebSocket示例。
当我第一次调查时，我认为唯一的方法就是使用“ fluent-effmpeg”。
我尝试使用“ fluent-ffmpeg”，但无法将笔记本电脑的网络摄像头设置为在Windows环境中运行并作为“ fluent-ffmppeg”命令的参数。
我也考虑过使用WebRTC，但我认为它不是供个人使用的，因为它是P2P连接。 （我还看到了如何将对等连接连接到像Janus这样的WebRTC服务器，但是我没有足够的参考资料来理解它。）
下面是问题的代码。
const SocketIO = require("socket.io");
const ffmpeg = require("fluent-ffmpeg");
const spawn = require("child-process-promise").spawn;
module.exports = server => {
const io = SocketIO(server, { path: "/socket.io" });
io.on("connection", socket => {
const req = socket.request;
const ip = req.headers["x-forwarded-for"] || req.connection.remoteAddress;
console.log("새로운 클라이언트 접속!", ip, socket.id, req.ip);
socket.on("disconnect", () => {
console.log("클라이언트 접속해제", ip, socket.id);
clearInterval(socket.interval);
});
socket.on("error", error => {
console.error(error);
});
socket.on("reply", data => {
console.log(data);
ffmpeg_command();
});
});
function ffmpeg_command() {
let arg = [
"-f",
"lavfi",
"-i",
"anullsrc=r=16000:cl=mono",
"-f",
"dshow",
"-ac",
"2",
"-i",
"video='HP Truevision HD'",
"-s",
"1280x720",
"-r",
"10",
"-vcodec",
"libx264",
"-pix_fmt",
"yuv420p",
"-preset",
"ultrafast",
"-r",
"25",
"-g",
"20",
"-b:v",
"2500k",
"-codec:a",
"libmp3lame",
"-ar",
"44100",
"-threads",
"6",
"-b:a",
"11025",
"-bufsize",
"512k",
"-f",
"flv",
"rtmp://a.rtmp.youtube.com/live2/8dfu-69k0-dxyw-896q"
];
spawn("ffmpeg", arg).catch(e => {
console.log(e);
});
}
};
这是错误：预期结果是您的网络摄像头正在运行，并且YouTube实时流传输成功。
{ ChildProcessError: `ffmpeg -f lavfi -i anullsrc=r=16000:cl=mono -f dshow -ac 2 -i video='HP Truevision HD' -s 1280x720 -r 10 -vcodec libx264 -pix_fmt yuv420p -preset ultrafast -r 25 -g 20 -b:v 2500k -codec:a libmp3lame -ar 44100 -threads 6 -b:a 11025 -bufsize 512k -f flv rtmp://a.rtmp.youtube.com/live2/8dfu-69k0-dxyw-896q` failed with code 1
at ChildProcess.<anonymous> (C:\Users\Tricky\Desktop\Work\ESC\ESC_temp\node_modules\child-process-promise\lib\index.js:132:23)
at ChildProcess.emit (events.js:182:13)
at ChildProcess.cp.emit (C:\Users\Tricky\Desktop\Work\ESC\ESC_temp\node_modules\child-process-promise\node_modules\cross-spawn\lib\enoent.js:40:29)
at maybeClose (internal/child_process.js:962:16)
at Socket.stream.socket.on (internal/child_process.js:381:11)
at Socket.emit (events.js:182:13)
at Pipe._handle.close (net.js:606:12)
name: 'ChildProcessError',
code: 1,
childProcess:
ChildProcess {
_events: { error: [Function], close: [Function] },
_eventsCount: 2,
_maxListeners: undefined,
_closesNeeded: 3,
_closesGot: 3,
connected: false,
signalCode: null,
exitCode: 1,
killed: false,
spawnfile: 'ffmpeg',
_handle: null,
spawnargs:
[ 'ffmpeg',
'-f',
'lavfi',
'-i',
'anullsrc=r=16000:cl=mono',
'-f',
'dshow',
'-ac',
'2',
'-i',
'video=\'HP Truevision HD\'',
'-s',
'1280x720',
'-r',
'10',
'-vcodec',
'libx264',
'-pix_fmt',
'yuv420p',
'-preset',
'ultrafast',
'-r',
'25',
'-g',
'20',
'-b:v',
'2500k',
'-codec:a',
'libmp3lame',
'-ar',
'44100',
'-threads',
'6',
'-b:a',
'11025',
'-bufsize',
'512k',
'-f',
'flv',
'rtmp://a.rtmp.youtube.com/live2/8dfu-69k0-dxyw-896q' ],
pid: 18928,
stdin:
Socket {
connecting: false,
_hadError: false,
_handle: null,
_parent: null,
_host: null,
_readableState: [ReadableState],
readable: false,
_events: [Object],
_eventsCount: 1,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
[Symbol(asyncId)]: 132,
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0 },
stdout:
Socket {
connecting: false,
_hadError: false,
_handle: null,
_parent: null,
_host: null,
_readableState: [ReadableState],
readable: false,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
write: [Function: writeAfterFIN],
[Symbol(asyncId)]: 133,
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0 },
stderr:
Socket {
connecting: false,
_hadError: false,
_handle: null,
_parent: null,
_host: null,
_readableState: [ReadableState],
readable: false,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
write: [Function: writeAfterFIN],
[Symbol(asyncId)]: 134,
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBytesRead)]: 1615,
[Symbol(kBytesWritten)]: 0 },
stdio: [ [Socket], [Socket], [Socket] ],
emit: [Function] },
stdout: undefined,
stderr: undefined }