initial commit

lib/video-utils.ts

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+import { execSync } from 'child_process'
+import { join, dirname, basename, extname } from 'path'
+import { existsSync, mkdirSync } from 'fs'
+
+/**
+ * Get video duration in seconds using ffprobe
+ */
+export function getVideoDuration(filePath: string): number | null {
+  try {
+    const output = execSync(
+      `ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "${filePath}"`,
+      { encoding: 'utf-8', timeout: 30000 }
+    )
+    const duration = parseFloat(output.trim())
+    return isNaN(duration) ? null : Math.round(duration)
+  } catch (error) {
+    console.warn(`Failed to get duration for ${filePath}:`, error)
+    return null
+  }
+}
+
+/**
+ * Generate thumbnail from video at specified time (default 10% or 5 seconds)
+ */
+export function generateVideoThumbnail(
+  videoPath: string,
+  thumbnailDir: string,
+  timePercent: number = 0.1
+): string | null {
+  try {
+    // Get video duration first to calculate timestamp
+    const duration = getVideoDuration(videoPath)
+    if (!duration) return null
+
+    const timestamp = Math.min(duration * timePercent, 5) // Max 5 seconds or 10%
+    const timeStr = formatTimeForFfmpeg(timestamp)
+
+    // Create thumbnail directory if it doesn't exist
+    if (!existsSync(thumbnailDir)) {
+      mkdirSync(thumbnailDir, { recursive: true })
+    }
+
+    const videoName = basename(videoPath, extname(videoPath))
+    const thumbnailName = `${videoName}-thumb.jpg`
+    const thumbnailPath = join(thumbnailDir, thumbnailName)
+
+    // Generate thumbnail using ffmpeg
+    execSync(
+      `ffmpeg -y -ss ${timeStr} -i "${videoPath}" -vframes 1 -q:v 2 -vf "scale=320:-1" "${thumbnailPath}"`,
+      { stdio: 'ignore', timeout: 60000 }
+    )
+
+    if (existsSync(thumbnailPath)) {
+      return thumbnailName
+    }
+    return null
+  } catch (error) {
+    console.warn(`Failed to generate thumbnail for ${videoPath}:`, error)
+    return null
+  }
+}
+
+/**
+ * Format seconds as HH:MM:SS for ffmpeg -ss parameter
+ */
+function formatTimeForFfmpeg(seconds: number): string {
+  const hrs = Math.floor(seconds / 3600)
+  const mins = Math.floor((seconds % 3600) / 60)
+  const secs = Math.floor(seconds % 60)
+  const ms = Math.round((seconds % 1) * 1000)
+  return `${hrs.toString().padStart(2, '0')}:${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}.${ms.toString().padStart(3, '0')}`
+}
+
+/**
+ * Check if ffmpeg/ffprobe are available
+ */
+export function checkVideoTools(): boolean {
+  try {
+    execSync('ffprobe -version', { stdio: 'ignore' })
+    execSync('ffmpeg -version', { stdio: 'ignore' })
+    return true
+  } catch {
+    return false
+  }
+}