add services/worker/src/ffmpeg/executor.js

services/worker/src/ffmpeg/executor.js

@@ -0,0 +1,84 @@
+import { execFile } from 'child_process';
+import { promisify } from 'util';
+
+const execFileAsync = promisify(execFile);
+
+export const runFFmpeg = async (args, options = {}) => {
+  const { stdio = 'pipe', ...otherOptions } = options;
+  try {
+    const { stdout, stderr } = await execFileAsync('ffmpeg', args, {
+      stdio,
+      ...otherOptions,
+    });
+    return { stdout, stderr };
+  } catch (error) {
+    throw new Error(`FFmpeg error: ${error.message}\nStderr: ${error.stderr}`);
+  }
+};
+
+export const getMediaDuration = async (inputPath) => {
+  const args = [
+    '-v', 'error',
+    '-show_entries', 'format=duration',
+    '-of', 'default=noprint_wrappers=1:nokey=1:noinvalidchars=1',
+    inputPath,
+  ];
+  const { stdout } = await runFFmpeg(args);
+  return parseFloat(stdout.trim());
+};
+
+export const extractFrameAtTime = async (inputPath, outputPath, timeCode) => {
+  const args = [
+    '-i', inputPath,
+    '-ss', timeCode,
+    '-vframes', '1',
+    '-q:v', '2',
+    outputPath,
+  ];
+  await runFFmpeg(args);
+};
+
+export const transcodeVideo = async (inputPath, outputPath, options = {}) => {
+  const {
+    videoCodec = 'libx264',
+    videoPreset = 'fast',
+    videoBitrate = '10M',
+    audioCodec = 'aac',
+    audioBitrate = '192k',
+  } = options;
+
+  const args = [
+    '-i', inputPath,
+    '-c:v', videoCodec,
+    '-preset', videoPreset,
+    '-b:v', videoBitrate,
+    '-c:a', audioCodec,
+    '-b:a', audioBitrate,
+    '-movflags', '+faststart',
+    outputPath,
+  ];
+
+  await runFFmpeg(args);
+};
+
+export const trimSegment = async (inputPath, outputPath, inPoint, outPoint) => {
+  const args = [
+    '-i', inputPath,
+    '-ss', inPoint,
+    '-to', outPoint,
+    '-c', 'copy',
+    outputPath,
+  ];
+  await runFFmpeg(args);
+};
+
+export const concatSegments = async (segmentListFile, outputPath) => {
+  const args = [
+    '-f', 'concat',
+    '-safe', '0',
+    '-i', segmentListFile,
+    '-c', 'copy',
+    outputPath,
+  ];
+  await runFFmpeg(args);
+};