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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
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Sur d’autres sites (5624)
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Error : spawn process ffmpeg ChildProcessError
10 juin 2019, par KarnonI wanted to make a program like OBS simply.
My ideal code behavior is to create a child process in Node.js and execute FFMPEG commands to send a webcam stream to yourtube live RTMP server. However, the actual behavior is caused by an error in the child-process-promise module used in node.js.
I’ve checked several questions, but I don’t have enough experience to understand them, and I hope there’s a clear solution.
I guess it was because I couldn’t find the command address of FFMPEG in the Node environment. Or is calling from the socket environment a problem ?
I checked that the FFMPEG command works in a Windows prompt environment.
※ Note : FFMPEG environment variables are registered.
Environment :
Window10,node.js,ffmpegThe code took advantage of a simple WebSocket example.
When I first investigated, I thought that the only way to do this was to use "fluent-effmpeg."
I tried "fluent-ffmpeg" but I couldn’t get my laptop webcam up and running in Windows environments as a parameter for the "fluent-ffmppeg" command.
I’ve also thought about using WebRTC, but I think it’s not for personal use because it’s a P2P connection. (I also saw how to connect a peer connection to a WebRTC server like Janus, but I didn’t have enough references to understand it.)
Below is the code of the problem.
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);
});
}
};Here’s the error : The expected result is that your webcam is working and YouTube live streaming is successful.
{ 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 }
</anonymous> -
Node.js Error : spawn process ffmpeg ChildProcessError
12 juin 2019, par KarnonI wanted to make a program like OBS simply.
My ideal code behavior is to create a child process in Node.js and execute FFMPEG commands to send a webcam stream to yourtube live RTMP server. However, the actual behavior is caused by an error in the child-process-promise module used in node.js.
I’ve checked several questions, but I don’t have enough experience to understand them, and I hope there’s a clear solution.
I guess it was because I couldn’t find the command address of FFMPEG in the Node environment. Or is calling from the socket environment a problem ?
I checked that the FFMPEG command works in a Windows prompt environment.
※ Note : FFMPEG environment variables are registered.
Environment :
Window10,node.js,ffmpegThe code took advantage of a simple WebSocket example.
When I first investigated, I thought that the only way to do this was to use "fluent-effmpeg."
I tried "fluent-ffmpeg" but I couldn’t get my laptop webcam up and running in Windows environments as a parameter for the "fluent-ffmppeg" command.
I’ve also thought about using WebRTC, but I think it’s not for personal use because it’s a P2P connection. (I also saw how to connect a peer connection to a WebRTC server like Janus, but I didn’t have enough references to understand it.)
Below is the code of the problem.
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);
});
}
};Here’s the error : The expected result is that your webcam is working and YouTube live streaming is successful.
{ 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 }
</anonymous> -
FFMpeg and max bitrate
26 septembre 2019, par Aurelien StrideFor a personal project, using AV1 codec, I have a bitrate constraint for a video to 88kbps, with choosen video bitrate at 66kbps and mono audio bitrate at 22kbps.
I currently use this command :
ffmpeg -i input.mp4 -c:v libaom-av1 -strict -2 -b:v 66150 -c:a libfdk_aac -ar 22050 -b:a 22050 -ac 1 -maxrate 66150 -bufsize 66150 -vf scale=720:-1 -movflags +faststart output.mp4However, my final video has a 95kbps bitrate :
Duration : 00:01:09.73, start : 0.000000, bitrate : 95 kb/s
Stream #0:0(und) : Video : av1 (Main) (av01 / 0x31307661), yuv420p(tv, progressive), 720x302, 69 kb/s, 24 fps, 24 tbr, 12288 tbn, 12288 tbc (default)
Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 22 kb/s (default)
Is there a method to validate my need ? Is it normal that 66+22>88kbps ?
Regards,
EDIT 1 : as @Gyan suggested, I’ve tried to reduce -bufsize parameter, but I still have a too high bitrate. The most working way is to set video bitrate -b:v to 50kbps, but it gives poorer image...
ffmpeg -i input.mp4 -c:v libaom-av1 -strict -2 -b:v 50k -c:a libfdk_aac -ar 22050 -b:a 22050 -ac 1 -minrate 33075 -maxrate 66150 -bufsize 44100 -vf scale=-1:360 -movflags +faststart -threads 1 output.mp4Any idea to limit overhead, if overhead is in cause ?
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