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Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...) -
Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ; -
Menus personnalisés
14 novembre 2010, parMediaSPIP utilise le plugin Menus pour gérer plusieurs menus configurables pour la navigation.
Cela permet de laisser aux administrateurs de canaux la possibilité de configurer finement ces menus.
Menus créés à l’initialisation du site
Par défaut trois menus sont créés automatiquement à l’initialisation du site : Le menu principal ; Identifiant : barrenav ; Ce menu s’insère en général en haut de la page après le bloc d’entête, son identifiant le rend compatible avec les squelettes basés sur Zpip ; (...)
Sur d’autres sites (10770)
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Issue with creating Video files from Binary files
22 septembre 2022, par user20057686We have a bunch of binary files that represent Video data.
This is how the binary files were created :


- 

- Used MediaRecorder from a React application to capture the browser window.
To capture the screen stream we used (Navigator.)MediaDevices.getDisplayMedia() API
- Each video is recorded for 1-second duration
- This data is then encoded with base64 and sent through a websocket. The server decodes the base64 string and stores the binary data in a file (without any extension)








So we now have a bunch of binary files each containing 1 second worth of video data.


The issue is, we are not able to convert all the binary files back to a single video.


- 

-
We tried using ffmpeg


copy /b * merged.


ffmpeg -i merged merged.mp4






Basically first merging all the binary files and converting to mp4. It didn't work. The resulting video duration is not equal to the (number_of_files) in seconds.


- 

-
We also tried converting individual chunks with ffmpeg but we get the below error :


[h264 @ 000001522dc74b80] [error] non-existing PPS 0 referenced
[h264 @ 000001522dc74b80] [error] non-existing PPS 0 referenced
[h264 @ 000001522dc74b80] [error] decode_slice_header error
[h264 @ 000001522dc74b80] [error] no frame !
I can provide the complete logs if needed.


-
Next thing we tried was to use MoviePy library in Python. We programmatically concatenated the files and saved them as WebM and imported it into MoviePy as a Video.








In all the above approaches, we couldn't get the full video.


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How to create a video file webm from chunks by media recorder api using ffmpeg
17 octobre 2020, par Caio NakaiI'm trying to create a webm video file from blobs generated by MediaRecorderAPI in a NodeJS server using FFMPEG. I'm able to create the .webm file but it's not playable, I ran this command
$ ffmpeg.exe -v error -i lel.webm -f null - >error.log 2>&1to generate an error log, the error log file contains this :



[null @ 000002ce7501de40] Application provided invalid, non monotonically increasing dts to muxer in stream 0 : 1 >= 1


[h264 @ 000002ce74a727c0] Invalid NAL unit size (804 > 74).


[h264 @ 000002ce74a727c0] Error splitting the input into NAL units.


Error while decoding stream #0:0 : Invalid data found when processing input




This is my web server code


const app = require("express")();
const http = require("http").createServer(app);
const io = require("socket.io")(http);
const fs = require("fs");
const child_process = require("child_process");

app.get("/", (req, res) => {
 res.sendFile(__dirname + "/index.html");
});

io.on("connection", (socket) => {
 console.log("a user connected");

 const ffmpeg = child_process.spawn("ffmpeg", [
 "-i",
 "-",
 "-vcodec",
 "copy",
 "-f",
 "flv",
 "rtmpUrl.webm",
 ]);

 ffmpeg.on("close", (code, signal) => {
 console.log(
 "FFmpeg child process closed, code " + code + ", signal " + signal
 );
 });

 ffmpeg.stdin.on("error", (e) => {
 console.log("FFmpeg STDIN Error", e);
 });

 ffmpeg.stderr.on("data", (data) => {
 console.log("FFmpeg STDERR:", data.toString());
 });

 socket.on("message", (msg) => {
 console.log("Writing blob! ");
 ffmpeg.stdin.write(msg);
 });

 socket.on("stop", () => {
 console.log("Stop recording..");
 ffmpeg.kill("SIGINT");
 });
});

http.listen(3000, () => {
 console.log("listening on *:3000");
});



And this is my client code, using HTML, JS :




 
 
 
 
 
 <code class="echappe-js"><script src='http://stackoverflow.com/socket.io/socket.io.js'></script>
<script>&#xA; const socket = io();&#xA; let mediaRecorder = null;&#xA; const startRecording = (someStream) => {&#xA; const mediaStream = new MediaStream();&#xA; const videoTrack = someStream.getVideoTracks()[0];&#xA; const audioTrack = someStream.getAudioTracks()[0];&#xA; console.log("Video trac ", videoTrack);&#xA; console.log("audio trac ", audioTrack);&#xA; mediaStream.addTrack(videoTrack);&#xA; mediaStream.addTrack(audioTrack);&#xA;&#xA; const recorderOptions = {&#xA; mimeType: "video/webm;codecs=h264",&#xA; videoBitsPerSecond: 3 * 1024 * 1024,&#xA; };&#xA;&#xA; mediaRecorder = new MediaRecorder(mediaStream, recorderOptions);&#xA; mediaRecorder.start(1000); // 1000 - the number of milliseconds to record into each Blob&#xA; mediaRecorder.ondataavailable = (event) => {&#xA; console.debug("Got blob data:", event.data);&#xA; if (event.data &amp;&amp; event.data.size > 0) {&#xA; socket.emit("message", event.data);&#xA; }&#xA; };&#xA; };&#xA;&#xA; const getVideoStream = async () => {&#xA; try {&#xA; const stream = await navigator.mediaDevices.getUserMedia({&#xA; video: true,&#xA; audio: true,&#xA; });&#xA; startRecording(stream);&#xA; myVideo.srcObject = stream;&#xA; } catch (e) {&#xA; console.error("navigator.getUserMedia error:", e);&#xA; }&#xA; };&#xA;&#xA; const stopRecording = () => {&#xA; mediaRecorder.stop();&#xA; socket.emit("stop");&#xA; };&#xA; </script>
 
hello world






 

<script>&#xA; const myVideo = document.getElementById("myvideo");&#xA; myVideo.muted = true;&#xA; </script>
 




Any help is appreciated !


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NodeJS : Fail to write byte array input from webcam to ffmpeg spawn process
23 mai 2024, par Thanesh PrabaghanI'm using NodeJS server to display an HTML page which has webcam option. Once user visited to my NodeJS server, it will serve html page. User can allow webcam option and see webcam view on the page.


In the backend, I send webcam stream (byte array) using
socket.io. I receive byte array successfully in backend with the help ofsocket.io. BUT MY PROBLEM IS, I can't pipe this byte array to theffmpegspawn process. I don't know how to properly pipe this data to theffmpeg. Once it done, all my problem will be solved.

On the other side, I have
node-media-serveras RTMP server to publish this stream to VLC player and other devices. Kindly help me to complete this task. I will attach all my code to this question. Kindly run this in your environment and answer the question.

MY HTML PAGE




 
 
 

 

 <code class="echappe-js"><script src="https://cdn.socket.io/4.7.5/socket.io.min.js" &#xA; integrity="integrity_code" &#xA; crossorigin="anonymous"></script>
 
 

 

<script>&#xA; const socket = io(&#x27;http://localhost:8080/&#x27;);&#xA; var video = document.getElementById("video");&#xA;&#xA; if (navigator.mediaDevices.getUserMedia) {&#xA; navigator.mediaDevices.getUserMedia({ video: true, audio:true })&#xA; .then(function (stream) {&#xA; const recorder = new MediaRecorder(stream);&#xA;&#xA; recorder.ondataavailable = event => {&#xA; socket.emit(&#x27;VideoStream&#x27;, event.data);&#xA; };&#xA; recorder.start(1000); &#xA; video.srcObject = stream;&#xA; }).catch(function (error) {&#xA; console.log("Something went wrong!");&#xA; });&#xA; } &#xA; </script>
 




FFMPEG IMPLEMENTATION


const express = require('express');
const app = express();
const http = require('http');
const server = http.createServer(app);
const { Server } = require("socket.io");
const io = new Server(server);
const path = require('node:path'); 
const { spawn } = require('node:child_process');

let cmd = spawn('ffmpeg.exe', [
 '-c:v', 'copy', '-preset', 'ultrafast', '-tune', 'zerolatency',
 '-c:a', 'aac', '-strict', '-2', '-ar', '44100', '-b:a', '64k',
 '-y',
 '-use_wallclock_as_timestamps', '1',
 '-async', '1',
 '-flush_packets', '1',
 '-rtbufsize', '1000',
 '-bufsize', '1000',
 '-f', 'flv',
 '-i','-',
 'rtmp://localhost:1935',
 ]);

app.use(express.static(path.join(__dirname, 'public')));

app.get('/', (req, res) => {
 res.sendFile(path.join(__dirname + 'index.html'));
});

io.on('connection', (socket) => {
 socket.on("VideoStream", (data) => {
 cmd.stdin.write(data);
 });
});

server.listen(8080, () => {
 console.log('listening on *:8080');
});

```
**NODE MEDIA SERVER IMPLEMENTATION**

```
const NodeMediaServer = require('node-media-server');

const config = {
 rtmp: {
 port: 1935,
 chunk_size: 60000,
 gop_cache: true,
 ping: 30,
 ping_timeout: 60
 },
 http: {
 port: 8000,
 allow_origin: '*'
 }
};

var nms = new NodeMediaServer(config)
nms.run();
```




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