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Autres articles (38)
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Soumettre améliorations et plugins supplémentaires
10 avril 2011Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...) -
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 (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 is the first MediaSPIP stable release.
Its official release date is June 21, 2013 and is announced here.
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)
Sur d’autres sites (5540)
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avformat/rtsp : Send mode=record instead of mode=receive in Transport header
15 janvier 2024, par Paul Orlykavformat/rtsp : Send mode=record instead of mode=receive in Transport header
Fixes server compatibility issues with rtspclientsink GStreamer plugin.
>From specification :
RFC 7826 "Real-Time Streaming Protocol Version 2.0" (https://datatracker.ietf.org/doc/html/rfc7826), section 18.54 :
mode : The mode parameter indicates the methods to be supported for
this session. The currently defined valid value is "PLAY". If
not provided, the default is "PLAY". The "RECORD" value was
defined in RFC 2326 ; in this specification, it is unspecified
but reserved. RECORD and other values may be specified in the
future.
RFC 2326 "Real Time Streaming Protocol (RTSP)" (https://datatracker.ietf.org/doc/html/rfc2326), section 12.39 :
mode :
The mode parameter indicates the methods to be supported for
this session. Valid values are PLAY and RECORD. If not
provided, the default is PLAY.mode=receive was always like this, from the initial commit 'a8ad6ffa rtsp : Add listen mode'.
For comparison, Wowza was used to push RTSP stream to. Both GStreamer and FFmpeg had no issues.
Here is the capture of Wowza responding to SETUP request :
200 OK
CSeq : 3
Server : Wowza Streaming Engine 4.8.26+4 build20231212155517
Cache-Control : no-cache
Expires : Mon, 15 Jan 2024 19:40:31 GMT
Transport : RTP/AVP/UDP ;unicast ;client_port=11640-11641 ;mode=record ;source=172.17.0.2 ;server_port=6976-6977
Date : Mon, 15 Jan 2024 19:40:31 GMT
Session : 1401457689 ;timeout=60Test setup :
Server : ffmpeg -loglevel trace -y -rtsp_flags listen -i rtsp ://0.0.0.0:30800/live.stream t.mp4
FFmpeg client : ffmpeg -re -i "Big Buck Bunny - FULL HD 30FPS.mp4" -c:v libx264 -f rtsp rtsp ://127.0.0.1:30800/live.stream
GStreamer client : gst-launch-1.0 videotestsrc is-live=true pattern=smpte ! queue ! videorate ! videoscale ! video/x-raw,width=640,height=360,framerate=60/1 ! timeoverlay font-desc="Sans, 84" halignment=center valignment=center ! queue ! videoconvert ! tee name=t t. ! x264enc bitrate=9000 pass=cbr speed-preset=ultrafast byte-stream=false key-int-max=15 threads=1 ! video/x-h264,profile=baseline ! queue ! rsink. audiotestsrc ! voaacenc ! queue ! rsink. t. ! queue ! autovideosink rtspclientsink name=rsink location=rtsp ://localhost:30800/live.streamTest results :
modified FFmpeg client -> stock server : ok
stock FFmpeg client -> modified server : ok
modified FFmpeg client -> modified server : ok
GStreamer client -> modified server : okSigned-off-by : Paul Orlyk <paul.orlyk@gmail.com>
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc> -
How to Record Video of a Dynamic Div Containing Multiple Media Elements in React Konva ?
14 septembre 2024, par Humayoun SaeedI'm working on a React application where I need to record a video of a specific div with the class name "layout." This div contains multiple media elements (such as images and videos) that are dynamically rendered inside divisions. I've tried several approaches, including using MediaRecorder, canvas-based recording with html2canvas, RecordRTC, and even ffmpeg, but none seem to capture the entire div along with its dynamic content effectively.


What would be the best approach to achieve this ? How can I record a video of this dynamically rendered div including all its media elements, ensuring a smooth capture of the transitions ?


What I’ve Tried :
MediaRecorder API : Didn't work effectively for capturing the entire div and its elements.
html2canvas : Captures snapshots but struggles with smooth transitions between media elements.
RecordRTC HTML Element Recording : Attempts to capture the canvas, but the output video size is 0 bytes.
CanvasRecorder, FFmpeg, and various other libraries also didn't provide the desired result.


import React, { useEffect, useState, useRef } from "react";

const Preview = ({ layout, onClose }) => {
 const [currentContent, setCurrentContent] = useState([]);
 const totalDuration = useRef(0);
 const videoRefs = useRef([]); // Store refs to each video element
 const [totalTime, setTotalTime] = useState(0); // Add this line
 const [elapsedTime, setElapsedTime] = useState(0); // Track elapsed time in seconds

 // video recording variable and state declaration
 // video recorder end
 // for video record useffect
 // Function to capture the renderDivision content

 const handleDownload = async () => {
 console.log("video downlaod function in developing mode.");
 };

 // end video record useffect

 // to apply motion and swtich in media of division start
 useEffect(() => {
 if (layout && layout.divisions) {
 const content = layout.divisions.map((division) => {
 let divisionDuration = 0;

 division.imageSrcs.forEach((src, index) => {
 const mediaDuration = division.durations[index]
 ? division.durations[index] * 1000 // Convert to milliseconds
 : 5000; // Fallback to 5 seconds if duration is missing
 divisionDuration += mediaDuration;
 });

 return {
 division,
 contentIndex: 0,
 divisionDuration,
 };
 });

 // Find the maximum duration
 const maxDuration = Math.max(...content.map((c) => c.divisionDuration));

 // Filter divisions that have the max duration
 const maxDurationDivisions = content.filter(
 (c) => c.divisionDuration === maxDuration
 );

 // Select the first one if there are multiple with the same max duration
 const selectedMaxDurationDivision = maxDurationDivisions[0];

 totalDuration.current = selectedMaxDurationDivision.divisionDuration; // Update the total duration in milliseconds

 setTotalTime(Math.floor(totalDuration.current / 1000000)); // Convert to seconds and set in state

 // console.log(
 // "Division with max duration (including ties):",
 // selectedMaxDurationDivision
 // );

 setCurrentContent(content);
 }
 }, [layout]);

 useEffect(() => {
 if (currentContent.length > 0) {
 const timers = currentContent.map(({ division, contentIndex }, i) => {
 const duration = division.durations[contentIndex]
 ? division.durations[contentIndex] // Duration is already in ms
 : 5000; // Default to 5000ms if no duration is defined

 const mediaElement = videoRefs.current[i];
 if (mediaElement && mediaElement.pause) {
 mediaElement.pause();
 }

 // Set up a timeout for each division to move to the next media after duration
 const timeoutId = setTimeout(() => {
 // Update content for each division independently
 updateContent(i, division, contentIndex, duration); // Move to the next content after duration

 // Ensure proper cleanup
 if (contentIndex + 1 >= division.imageSrcs.length) {
 clearTimeout(timeoutId); // Clear timeout to stop looping
 }
 }, duration);

 // Cleanup timers on component unmount
 return timeoutId;
 });

 // Return cleanup function to clear all timeouts
 return () => timers.forEach((timer) => clearTimeout(timer));
 }
 }, [currentContent]);
 // to apply motion and swtich in media of division end

 // Handle video updates when the duration is changed or a new video starts
 const updateContent = (i, division, contentIndex, duration) => {
 const newContent = [...currentContent];

 // Check if we are on the last media item
 if (contentIndex + 1 < division.imageSrcs.length) {
 // Move to next media if not the last one
 newContent[i].contentIndex = contentIndex + 1;
 } else {
 // If this is the last media item, pause here
 newContent[i].contentIndex = contentIndex; // Keep it at the last item
 setCurrentContent(newContent);

 // Handle video pause if the last media is a video
 const mediaElement = videoRefs.current[i];
 if (mediaElement && mediaElement.tagName === "VIDEO") {
 mediaElement.pause();
 mediaElement.currentTime = mediaElement.duration; // Pause at the end of the video
 }
 return; // Exit the function as we don't want to loop anymore
 }

 // Update state to trigger rendering of the next media
 setCurrentContent(newContent);

 // Handle video playback for the next media item
 const mediaElement = videoRefs.current[i];
 if (mediaElement) {
 mediaElement.pause();
 mediaElement.currentTime = 0;
 mediaElement
 .play()
 .catch((error) => console.error("Error playing video:", error));
 }
 };

 const renderDivision = (division, contentIndex, index) => {
 const mediaSrc = division.imageSrcs[contentIndex];

 if (!division || !division.imageSrcs || division.imageSrcs.length === 0) {
 return (
 
 <p>No media available</p>
 
 );
 }

 if (!mediaSrc) {
 return (
 
 <p>No media available</p>
 
 );
 }

 if (mediaSrc.endsWith(".mp4")) {
 return (
 > (videoRefs.current[index] = el)}
 src={mediaSrc}
 autoPlay
 controls={false}
 style={{
 width: "100%",
 height: "100%",
 objectFit: "cover",
 pointerEvents: "none",
 }}
 onLoadedData={() => {
 // Ensure video is properly loaded
 const mediaElement = videoRefs.current[index];
 if (mediaElement && mediaElement.readyState >= 3) {
 mediaElement.play().catch((error) => {
 console.error("Error attempting to play the video:", error);
 });
 }
 }}
 />
 );
 } else {
 return (
 
 );
 }
 };

 // progress bar code start
 useEffect(() => {
 if (totalDuration.current > 0) {
 // Reset elapsed time at the start
 setElapsedTime(0);

 const interval = setInterval(() => {
 setElapsedTime((prevTime) => {
 // Increment the elapsed time by 1 second if it's less than the total time
 if (prevTime < totalTime) {
 return prevTime + 1;
 } else {
 clearInterval(interval); // Clear the interval when totalTime is reached
 return prevTime;
 }
 });
 }, 1000); // Update every second

 // Clean up the interval on component unmount
 return () => clearInterval(interval);
 }
 }, [totalTime]);

 // progress bar code end

 return (
 
 
 
 Close
 
 <h2>Preview Layout: {layout.name}</h2>
 
 {currentContent.map(({ division, contentIndex }, i) => (
 
 {renderDivision(division, contentIndex, i)}
 
 ))}
 {/* canvas code for video start */}
 {/* canvas code for video end */}
 {/* Progress Bar and Time */}
 / Background color for progress bar track
 display: "flex",
 justifyContent: "space-between",
 alignItems: "center",
 }}
 >
 totalTime) * 100}%)`,
 backgroundColor: "#28a745", // Green color for progress bar
 transition: "width 0.5s linear", // Smooth transition
 }}
 >

 {/* Time display */}
 {/* / Fixed right margin
 zIndex: 1, // Ensure it's above the progress bar
 padding: "5px",
 fontSize: "18px",
 fontWeight: "600",
 color: "#333",
 // backgroundColor: "rgba(255, 255, 255, 0.8)", // Add a subtle background for readability
 }}
 >
 {elapsedTime} / {totalTime}s
 */}
 
 

 {/* Download button */}
 > (e.target.style.backgroundColor = "#218838")}
 onMouseOut={(e) => (e.target.style.backgroundColor = "#28a745")}
 >
 Download Video
 
 {/* {recording && <p>Recording in progress...</p>} */}
 
 
 );
};

export default Preview;



I tried several methods to record the content of the div with the class "layout," which contains dynamic media elements such as images and videos. The approaches I attempted include :


MediaRecorder API : I expected this API to capture the entire div and its contents, but it didn't handle the rendering of all dynamic media elements properly.


html2canvas : I used this to capture the layout as a canvas and then attempted to convert it into a video stream. However, it could not capture smooth transitions between media elements, leading to a choppy or incomplete video output.


RecordRTC : I integrated RecordRTC to capture the canvas stream of the div. Despite setting up the recorder, the resulting video file either had a 0-byte size or only captured parts of the content inconsistently.


FFmpeg and other libraries : I explored these tools hoping they would provide a seamless capture of the dynamic content, but they also failed to capture the full media elements, including videos playing within the layout.


In all cases, I expected to get a complete video recording of the div, including all media transitions, but the results were incomplete or not functional.


Now, I’m seeking an approach or best practice to record the entire div with its dynamic content and media playback.


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avfilter/vf_drawtext : implement text alignment
26 mai 2023, par yethie
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