sync

src/utils/system.ts

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+import { spawn } from 'node:child_process';
+
+/**
+ * Check if FFmpeg is available
+ */
+export async function checkFFmpeg(): Promise<boolean> {
+  return new Promise((resolve) => {
+    const proc = spawn('ffmpeg', ['-version']);
+    proc.on('error', () => resolve(false));
+    proc.on('close', (code) => resolve(code === 0));
+  });
+}
+
+/**
+ * Check if MP4Box is available
+ */
+export async function checkMP4Box(): Promise<boolean> {
+  return new Promise((resolve) => {
+    const proc = spawn('MP4Box', ['-version']);
+    proc.on('error', () => resolve(false));
+    proc.on('close', (code) => resolve(code === 0));
+  });
+}
+
+/**
+ * Check if NVENC is available
+ */
+export async function checkNvenc(): Promise<boolean> {
+  return new Promise((resolve) => {
+    const proc = spawn('ffmpeg', ['-hide_banner', '-encoders']);
+    let output = '';
+    
+    proc.stdout.on('data', (data) => {
+      output += data.toString();
+    });
+    
+    proc.on('error', () => resolve(false));
+    proc.on('close', (code) => {
+      if (code !== 0) {
+        resolve(false);
+      } else {
+        resolve(output.includes('h264_nvenc') || output.includes('hevc_nvenc'));
+      }
+    });
+  });
+}
+
+/**
+ * Execute FFmpeg command with progress tracking
+ */
+export async function execFFmpeg(
+  args: string[],
+  onProgress?: (percent: number) => void,
+  duration?: number
+): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const proc = spawn('ffmpeg', args);
+
+    let stderrData = '';
+
+    proc.stderr.on('data', (data) => {
+      const text = data.toString();
+      stderrData += text;
+
+      if (onProgress && duration) {
+        // Parse time from FFmpeg output: time=00:01:23.45
+        const timeMatch = text.match(/time=(\d{2}):(\d{2}):(\d{2}\.\d{2})/);
+        if (timeMatch) {
+          const hours = parseInt(timeMatch[1]);
+          const minutes = parseInt(timeMatch[2]);
+          const seconds = parseFloat(timeMatch[3]);
+          const currentTime = hours * 3600 + minutes * 60 + seconds;
+          const percent = Math.min(100, (currentTime / duration) * 100);
+          onProgress(percent);
+        }
+      }
+    });
+
+    proc.on('error', (err) => {
+      reject(new Error(`FFmpeg error: ${err.message}`));
+    });
+
+    proc.on('close', (code) => {
+      if (code === 0) {
+        resolve();
+      } else {
+        reject(new Error(`FFmpeg failed with exit code ${code}\n${stderrData}`));
+      }
+    });
+  });
+}
+
+/**
+ * Execute MP4Box command
+ */
+export async function execMP4Box(args: string[]): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const proc = spawn('MP4Box', args);
+
+    let stdoutData = '';
+    let stderrData = '';
+
+    proc.stdout.on('data', (data) => {
+      stdoutData += data.toString();
+    });
+
+    proc.stderr.on('data', (data) => {
+      stderrData += data.toString();
+    });
+
+    proc.on('error', (err) => {
+      reject(new Error(`MP4Box error: ${err.message}`));
+    });
+
+    proc.on('close', (code) => {
+      if (code === 0) {
+        resolve();
+      } else {
+        const output = stderrData || stdoutData;
+        reject(new Error(`MP4Box failed with exit code ${code}\n${output}`));
+      }
+    });
+  });
+}
+