feat: initial DnD and ffmpeg install

apps/web/src/lib/ffmpeg-utils.ts

@@ -0,0 +1,197 @@
+import { FFmpeg } from '@ffmpeg/ffmpeg';
+import { toBlobURL } from '@ffmpeg/util';
+
+let ffmpeg: FFmpeg | null = null;
+
+export const initFFmpeg = async (): Promise<FFmpeg> => {
+  if (ffmpeg) return ffmpeg;
+
+  ffmpeg = new FFmpeg();
+  
+  // Use locally hosted files instead of CDN
+  const baseURL = '/ffmpeg';
+  
+  await ffmpeg.load({
+    coreURL: await toBlobURL(`${baseURL}/ffmpeg-core.js`, 'text/javascript'),
+    wasmURL: await toBlobURL(`${baseURL}/ffmpeg-core.wasm`, 'application/wasm'),
+  });
+
+  return ffmpeg;
+};
+
+export const generateThumbnail = async (
+  videoFile: File,
+  timeInSeconds: number = 1
+): Promise<string> => {
+  const ffmpeg = await initFFmpeg();
+  
+  const inputName = 'input.mp4';
+  const outputName = 'thumbnail.jpg';
+  
+  // Write input file
+  await ffmpeg.writeFile(inputName, new Uint8Array(await videoFile.arrayBuffer()));
+  
+  // Generate thumbnail at specific time
+  await ffmpeg.exec([
+    '-i', inputName,
+    '-ss', timeInSeconds.toString(),
+    '-vframes', '1',
+    '-vf', 'scale=320:240',
+    '-q:v', '2',
+    outputName
+  ]);
+  
+  // Read output file
+  const data = await ffmpeg.readFile(outputName);
+  const blob = new Blob([data], { type: 'image/jpeg' });
+  
+  // Cleanup
+  await ffmpeg.deleteFile(inputName);
+  await ffmpeg.deleteFile(outputName);
+  
+  return URL.createObjectURL(blob);
+};
+
+export const trimVideo = async (
+  videoFile: File,
+  startTime: number,
+  endTime: number,
+  onProgress?: (progress: number) => void
+): Promise<Blob> => {
+  const ffmpeg = await initFFmpeg();
+  
+  const inputName = 'input.mp4';
+  const outputName = 'output.mp4';
+  
+  // Set up progress callback
+  if (onProgress) {
+    ffmpeg.on('progress', ({ progress }) => {
+      onProgress(progress * 100);
+    });
+  }
+  
+  // Write input file
+  await ffmpeg.writeFile(inputName, new Uint8Array(await videoFile.arrayBuffer()));
+  
+  const duration = endTime - startTime;
+  
+  // Trim video
+  await ffmpeg.exec([
+    '-i', inputName,
+    '-ss', startTime.toString(),
+    '-t', duration.toString(),
+    '-c', 'copy', // Use stream copy for faster processing
+    outputName
+  ]);
+  
+  // Read output file
+  const data = await ffmpeg.readFile(outputName);
+  const blob = new Blob([data], { type: 'video/mp4' });
+  
+  // Cleanup
+  await ffmpeg.deleteFile(inputName);
+  await ffmpeg.deleteFile(outputName);
+  
+  return blob;
+};
+
+export const getVideoInfo = async (videoFile: File): Promise<{
+  duration: number;
+  width: number;
+  height: number;
+  fps: number;
+}> => {
+  const ffmpeg = await initFFmpeg();
+  
+  const inputName = 'input.mp4';
+  
+  // Write input file
+  await ffmpeg.writeFile(inputName, new Uint8Array(await videoFile.arrayBuffer()));
+  
+  // Get video info
+  await ffmpeg.exec(['-i', inputName, '-f', 'null', '-']);
+  
+  // Note: In a real implementation, you'd parse the FFmpeg output
+  // For now, we'll return default values and enhance this later
+  
+  // Cleanup
+  await ffmpeg.deleteFile(inputName);
+  
+  return {
+    duration: 10, // Placeholder - would parse from FFmpeg output
+    width: 1920,  // Placeholder
+    height: 1080, // Placeholder
+    fps: 30       // Placeholder
+  };
+};
+
+export const convertToWebM = async (
+  videoFile: File,
+  onProgress?: (progress: number) => void
+): Promise<Blob> => {
+  const ffmpeg = await initFFmpeg();
+  
+  const inputName = 'input.mp4';
+  const outputName = 'output.webm';
+  
+  // Set up progress callback
+  if (onProgress) {
+    ffmpeg.on('progress', ({ progress }) => {
+      onProgress(progress * 100);
+    });
+  }
+  
+  // Write input file
+  await ffmpeg.writeFile(inputName, new Uint8Array(await videoFile.arrayBuffer()));
+  
+  // Convert to WebM
+  await ffmpeg.exec([
+    '-i', inputName,
+    '-c:v', 'libvpx-vp9',
+    '-crf', '30',
+    '-b:v', '0',
+    '-c:a', 'libopus',
+    outputName
+  ]);
+  
+  // Read output file
+  const data = await ffmpeg.readFile(outputName);
+  const blob = new Blob([data], { type: 'video/webm' });
+  
+  // Cleanup
+  await ffmpeg.deleteFile(inputName);
+  await ffmpeg.deleteFile(outputName);
+  
+  return blob;
+};
+
+export const extractAudio = async (
+  videoFile: File,
+  format: 'mp3' | 'wav' = 'mp3'
+): Promise<Blob> => {
+  const ffmpeg = await initFFmpeg();
+  
+  const inputName = 'input.mp4';
+  const outputName = `output.${format}`;
+  
+  // Write input file
+  await ffmpeg.writeFile(inputName, new Uint8Array(await videoFile.arrayBuffer()));
+  
+  // Extract audio
+  await ffmpeg.exec([
+    '-i', inputName,
+    '-vn', // Disable video
+    '-acodec', format === 'mp3' ? 'libmp3lame' : 'pcm_s16le',
+    outputName
+  ]);
+  
+  // Read output file
+  const data = await ffmpeg.readFile(outputName);
+  const blob = new Blob([data], { type: `audio/${format}` });
+  
+  // Cleanup
+  await ffmpeg.deleteFile(inputName);
+  await ffmpeg.deleteFile(outputName);
+  
+  return blob;
+};