{ "short_name": "SportVideo", "name": "Sport Video App", "start_url": "/index.html", "display": "standalone", "background_color": "#ffffff", "theme_color": "#000000", "icons": [ { "src": "/icons/icon-192x192.png", "type": "image/png", "sizes": "192x192" }, { "src": "/icons/icon-512x512.png", "type": "image/png", "sizes": "512x512" } ] } const CACHE_NAME = 'sport-video-app-cache-v1'; const urlsToCache = [ '/', '/index.html', '/css/styles.css', '/js/main.js', '/icons/icon-192x192.png', '/icons/icon-512x512.png' ]; self.addEventListener('install', event => { event.waitUntil( caches.open(CACHE_NAME).then(cache => cache.addAll(urlsToCache)) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(response => response || fetch(event.request)) ); }); // src/context/FFmpegContext.jsx import React, { createContext, useContext, useState, useEffect } from 'react'; import { createFFmpeg } from '@ffmpeg/ffmpeg'; const FFmpegContext = createContext(); export const useFFmpeg = () => useContext(FFmpegContext); export const FFmpegProvider = ({ children }) => { const [ffmpeg] = useState(() => createFFmpeg({ log: true })); const [isLoaded, setIsLoaded] = useState(false); const [error, setError] = useState(null); useEffect(() => { const loadFFmpeg = async () => { try { await ffmpeg.load(); setIsLoaded(true); } catch (err) { setError(err); } }; loadFFmpeg(); }, [ffmpeg]); return ( {children} ); }; // src/context/VideoContext.jsx import React, { createContext, useContext, useState } from 'react'; const VideoContext = createContext(); export const useVideo = () => useContext(VideoContext); export const VideoProvider = ({ children }) => { const [videos, setVideos] = useState([]); const addVideo = (video) => { setVideos(prevVideos => [...prevVideos, video]); }; return ( {children} ); }; // src/components/VideoEditor.jsx import React, { useState, useRef } from 'react'; import { useFFmpeg } from '../context/FFmpegContext'; import { useVideo } from '../context/VideoContext'; import { toast } from 'react-toastify'; import { CircularProgress } from '@mui/material'; const VideoEditor = () => { const { ffmpeg, isLoaded, error } = useFFmpeg(); const { addVideo } = useVideo(); const [videoFile, setVideoFile] = useState(null); const [processing, setProcessing] = useState(false); const [progress, setProgress] = useState(0); const videoRef = useRef(); const handleFileUpload = async (e) => { const file = e.target.files[0]; if (!file) return; if (!file.type.startsWith('video/')) { toast.error('Nur Videoformate erlaubt (MP4, WebM, MOV)'); return; } if (file.size > process.env.REACT_APP_MAX_FILE_SIZE) { toast.error('Maximale Dateigröße: 100MB'); return; } try { setVideoFile(URL.createObjectURL(file)); } catch (err) { toast.error('Fehler beim Verarbeiten der Datei'); } }; const trimVideo = async () => { if (!videoFile) { toast.error('Kein Video ausgewählt'); return; } setProcessing(true); try { const inputName = 'input.mp4'; const outputName = 'output.mp4'; const response = await fetch(videoFile); const buffer = await response.arrayBuffer(); ffmpeg.FS('writeFile', inputName, new Uint8Array(buffer)); ffmpeg.setProgress(({ ratio }) => setProgress(ratio)); // Trimme ab 2 Sekunden, Dauer 5 Sekunden await ffmpeg.run('-i', inputName, '-ss', '00:00:02', '-t', '5', outputName); const data = ffmpeg.FS('readFile', outputName); const trimmedVideoURL = URL.createObjectURL( new Blob([data.buffer], { type: 'video/mp4' }) ); addVideo(trimmedVideoURL); toast.success('Video erfolgreich getrimmt'); } catch (err) { console.error(err); toast.error('Fehler beim Trimmen des Videos'); } finally { setProcessing(false); } }; return (

Sport Video Editor

{videoFile &&
); }; export default VideoEditor; cd sport-video-app npx create-react-app sport-video-app node -v npm -v npm install npm start // public/service-worker.js const CACHE_NAME = 'sport-video-app-cache-v1'; const urlsToCache = [ '/', '/index.html', '/css/styles.css', // falls du CSS nutzt '/js/main.js', // falls weitere statische JS-Dateien vorhanden sind '/icons/icon-192x192.png', '/icons/icon-512x512.png' ]; self.addEventListener('install', event => { event.waitUntil( caches.open(CACHE_NAME).then(cache => cache.addAll(urlsToCache)) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(response => response || fetch(event.request)) ); }); VideoEditor.jsxsport-video-app/ ├── public/ │ ├── index.html │ ├── manifest.json │ ├── service-worker.js │ └── icons/ │ ├── icon-192x192.png │ └── icon-512x512.png ├── src/ │ ├── components/ │ │ └── VideoEditor.jsx │ ├── context/ │ │ ├── FFmpegContext.jsx │ │ └── VideoContext.jsx │ ├── App.jsx │ └── index.js ├── .env ├── package.json └── README.md