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Autres articles (39)
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Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
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MediaSPIP Init et Diogène : types de publications de MediaSPIP
11 novembre 2010, parÀ l’installation d’un site MediaSPIP, le plugin MediaSPIP Init réalise certaines opérations dont la principale consiste à créer quatre rubriques principales dans le site et de créer cinq templates de formulaire pour Diogène.
Ces quatre rubriques principales (aussi appelées secteurs) sont : Medias ; Sites ; Editos ; Actualités ;
Pour chacune de ces rubriques est créé un template de formulaire spécifique éponyme. Pour la rubrique "Medias" un second template "catégorie" est créé permettant d’ajouter (...) -
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Sur d’autres sites (7382)
-
How add Data Stream into MXF(using mpeg2video) file with FFmpeg and C/C++
26 mars 2019, par Helmuth SchmitzI’m a little bit stuck here trying create a MXF file
with data stream on it. I have several MXF video files that contain
this standard**1 Video Stream:
Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 50000 kb/s, 29.9
16 audio streams
Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
1 Data Stream:
Data: none**This data stream, contain personal data inside video file. I can
open this stream and data is really there. Is all ok. But, when i try
to create a file exactly like this, everytime i call "avformat_write_header"
it returns an error.If i do comment the creation of this data streams the video file is succeffully
created.If i change to "mpegts" with this data stream, the video file is also succeffully
created.But, i can’t use mpets and i need this data stream.
I know that is possible MXF with data stream cause i have this originals files
that have this combination.So, i know that i missing something in my code.
This is the way i create this Data Stream :
void CFFmpegVideoWriter::addDataStream(EOutputStream *ost, AVFormatContext *oc, AVCodec **codec, enum AVCodecID codec_id)
{
AVCodecParameters *par;
ost->stream = avformat_new_stream(oc, NULL);
if (ost->stream == NULL)
{
fprintf(stderr, "OOooohhh man: avformat_new_stream() failed.\n");
return;
}
par = ost->stream->codecpar;
ost->stream->index = 17;
par->codec_id = AV_CODEC_ID_NONE;
par->codec_type = AVMEDIA_TYPE_DATA;
ost->stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
}the file openning is this :
CFFMpegVideoWriter::CFFMpegVideoWriter(QString outputfilename) : QThread()
{
av_register_all();
avcodec_register_all();
isOpen = false;
shouldClose = false;
frameIndex = 0;
#ifdef __linux__
QByteArray bFilename = outputfilename.toUtf8();
#else
QByteArray bFilename = outputfilename.toLatin1();
#endif
const char* filename = bFilename.data();
codecContext = NULL;
//encontra o formato desejado...
outputFormat = av_guess_format("mp2v", filename, nullptr);
if (!outputFormat)
{
qDebug("Could not find suitable output format\n");
return;
}
//encontra o codec...
codec = avcodec_find_encoder(outputFormat->video_codec);
if (!codec)
{
qDebug( "Codec not found\n");
return;
}
//aloca o contexto do codec...
codecContext = avcodec_alloc_context3(codec);
codecContext->field_order = AV_FIELD_TT;
codecContext->profile = FF_PROFILE_MPEG2_422;
//aloca o contexto do formato...
formatContext = avformat_alloc_context();
formatContext->oformat = outputFormat;
//aloca o contexto da midia de saida...
avformat_alloc_output_context2(&formatContext, NULL, NULL, filename);
if (!formatContext)
{
qDebug("Erro");
return;
}
videoStream.tmp_frame = NULL;
videoStream.swr_ctx = NULL;
//adiciona a stream de video...
if (outputFormat->video_codec != AV_CODEC_ID_NONE)
{
addVideoStream(&videoStream, formatContext, &video_codec, outputFormat->video_codec);
}
//adiciona as 16 streams de audio...
if (outputFormat->audio_codec != AV_CODEC_ID_NONE)
{
for (int i = 0; i < 16; i++)
{
addAudioStream(&audioStream[i], formatContext, &audio_codec, outputFormat->audio_codec);
}
}
addDataStream(&datastream, formatContext, &video_codec, outputFormat->video_codec);
videoStream.sws_ctx = NULL;
for (int i = 0; i < 16; i++)
{
audioStream[i].sws_ctx = NULL;
}
opt = NULL;
//carreca o codec de video para stream de video...
initVideoCodec(formatContext, video_codec, &videoStream, opt);
//carrega o codec de audio para stream de audio...s
for (int i = 0; i < 16; i++)
{
initAudioCodec(formatContext, audio_codec, &audioStream[i], opt);
}
av_dump_format(formatContext, 0, filename, 1);
//abrea o arquivo de saida..
if (!(outputFormat->flags & AVFMT_NOFILE))
{
ret = avio_open(&formatContext->pb, filename, AVIO_FLAG_WRITE);
if (ret < 0)
{
qDebug("Could not open'%s", filename);
return;
}
}
//escreve o cabecalho do arquivo...
ret = avformat_write_header(formatContext, &opt);
if (ret < 0)
{
qDebug("Error occurred when opening output file");
return;
}
isOpen = true;
QThread::start();
}The code always fails at "avformat_write_header" call.
But if i remove "datastream" or change it to mpegts everything runs fine.
Any ideia of what am i doing wrong here ?
Thanks for reading this.
Helmuth
-
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>
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