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GetID3 - Bloc informations de fichiers
9 avril 2013, par
Mis à jour : Mai 2013
Langue : français
Type : Image
Autres articles (37)
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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
Automated installation script of MediaSPIP
25 avril 2011, parTo overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
The documentation of the use of this installation script is available here.
The code of this (...)
Sur d’autres sites (6225)
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Is ffmpeg able to read ArrayBuffer input from stream
7 juillet 2017, par jAndyI want to accomplish the following tasks :
- Record Video+Audio from any HTML5 (
MediaStream) capable browser - Send that data via
WebSocketasBlob/ArrayBufferchunks to a server - Broadcast that input stream-data to multiple clients
As it turns out, this brought me into a world of pain. The first task is fairly simple using the HTML5
MediaStreamobjects alongside WebSockets.// ... for simplicity...
navigator.mediaDevices.getUserMedia({ audio: true, video: true }).then(stream => {
let mediaRecorder = new MediaRecorder( stream );
// ...
mediaRecorder.ondataavailable = e => {
webSocket.send( 'newVideoData', e.data ); // configured for binary data
};
});Now, I want to receive those data fragments and stream those via
nginx vod module, because I guess I want the output stream in HLS or DASH.
I could write a littlenodejsscript as backend, which just receives the binary chunks and write them to a file or stream, and just reference it songinx vod modulecould possibly read it and create them3u8manifest on the fly ?I am wondering now,
- if
ffmpegis able to read that binary data directly (should bewebm format), without a man-in-the-middle script, "somehow" ? - If not, do I have to write the data down into a file and pass that as input to
ffmpegor can I (should I) pipe the data to a self spawnedffmpeginstance ? (if so, how ?) - Do I actually need the
nginx server(probably alongside rtmp module) to deliver the output stream as HLS or could I just useffmpegto also create a dynamic manifest ? - Is the
nginx vod modulecapable of creating a dynamic hls/dash manifest or must the input data be complete beforehand ? - Ultimately, am I on the totally wrong track here ? :P
Actually I just want to create a little video-live-chat demo, without any plugins or 3rd party encoding software, pure browser.
- Record Video+Audio from any HTML5 (
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Ffmpeg : Bitstream not supported by this decoder
23 décembre 2018, par John KimI’m trying to create a livestream web app using NodeJS. The code I currently have emits a raw (webm format) binary stream from the webcam on the client using socket IO and the node server receives this raw data. Using fluent-ffmpeg, I want to encode this binary stream into mpegts and send it to an RTMP server in real time, without creating any intermediary files. However when trying to convert the blobs in ffmpeg I get the following error :
Error while decoding stream #0:1: Invalid data found when processing input
[NULL @ 000001b15e67bd80] Invalid sync code 61f192.
[libvpx @ 000001b15e6c5000] Failed to decode frame: Bitstream not supported by this decoderMy relevant frontend client code :
navigator.mediaDevices.getUserMedia(constraints).then(function(stream) {
video_show(stream);//only show locally, not remotely
socket.emit('config_rtmpDestination',url);
socket.emit('start','start');
var options = {mimeType: 'video/webm;codecs=h264'};
mediaRecorder = new MediaRecorder(stream, options);
mediaRecorder.start(2000);
mediaRecorder.onstop = function(e) {
stream.stop();
}
mediaRecorder.ondataavailable = function(e) {
//var arraybuffer = Uint8Array.from(e.data).buffer;
socket.emit("binarystream", blob);
//chunks.push(e.data);
}
}).catch(function(err) {
console.log('The following error occured: ' + err);
show_output('Local getUserMedia ERROR:'+err);
});Relevant NodeJS server code :
socket.on('binarystream',function(m){
feedStream(m);
});
socket.on('start',function(m){
...
var ops=[
'-vcodec', socket._vcodec,'-i','-',
'-c:v', 'libx264', '-preset', 'veryfast', '-tune', 'zerolatency',
'-an', '-bufsize', '1000',
'-f', 'mpegts', socket._rtmpDestination
];
ffmpeg_process=spawn('ffmpeg', ops);
feedStream=function(data){
ffmpeg_process.stdin.write(data);
}
...
} -
Encountered an exception of ffmpeg.wasm can only run one command at a time
2 mars 2023, par Itay113I want to make a video chat using ffmepg wasm (I know the standard is WebRTC but my assignment is to do this with ffmpeg wasm and a server connecting the 2 clients) and when doing the follow code I am getting ffmpeg.wasm can only run one command at a time exception on the ffmpegWorker.run line


function App() {
 const ffmpegWorker = createFFmpeg({
 log: true
 })

 async function initFFmpeg() {
 await ffmpegWorker.load();
 }

 async function transcode(webcamData) {
 const name = 'record.webm';
 await ffmpegWorker.FS('writeFile', name, await fetchFile(webcamData));
 ffmpegWorker.run('-i', name, '-preset', 'ultrafast', '-c:v', 'h264', '-crf', '28', '-b:v', '0', '-row-mt', '1', '-f', 'mp4', 'output.mp4')
 .then(()=> {

 const data = ffmpegWorker.FS('readFile', 'output.mp4');
 
 const video = document.getElementById('output-video');
 video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
 ffmpegWorker.FS('unlink', 'output.mp4');
 })
 }

 function requestMedia() {
 const webcam = document.getElementById('webcam');
 const chunks = []
 navigator.mediaDevices.getUserMedia({ video: true, audio: true })
 .then(async (stream) => {
 webcam.srcObject = stream;
 await webcam.play();
 const mediaRecorder = new MediaRecorder(stream);
 mediaRecorder.start(0);
 mediaRecorder.onstop = function(e) {
 stream.stop(); 
 }
 mediaRecorder.ondataavailable = async function(e) {
 chunks.push(e.data);
 await transcode(new Uint8Array(await (new Blob(chunks)).arrayBuffer()));
 
 }
 })
 }

 useEffect(() => {
 requestMedia();
 }, [])

 return (
 <div classname="App">
 <div>
 <video width="320px" height="180px"></video>
 <video width="320px" height="180px"></video>
 </div>
 </div>
 );
}


I have tried messing around with the time slice on the media recorder start method argument but it didn't helped


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