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#3 The Safest Place
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#2 Typewriter Dance
15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#1 The Wires
11 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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ED-ME-5 1-DVD
11 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Audio
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Revolution of Open-source and film making towards open film making
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Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (42)
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Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)
Sur d’autres sites (9916)
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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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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);
}
...
} -
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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