From d8f39b126d9fe4bec1c12fb213548cc6edc87867 Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Thu, 1 Jun 2023 14:51:16 +0200
Subject: Add storyboard support

---
 shared/ffmpeg/ffmpeg-images.ts | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'shared/ffmpeg')

diff --git a/shared/ffmpeg/ffmpeg-images.ts b/shared/ffmpeg/ffmpeg-images.ts
index 2db63bd8b..27305382c 100644
--- a/shared/ffmpeg/ffmpeg-images.ts
+++ b/shared/ffmpeg/ffmpeg-images.ts
@@ -56,4 +56,41 @@ export class FFmpegImage {
         .thumbnail(thumbnailOptions)
     })
   }
+
+  async generateStoryboardFromVideo (options: {
+    path: string
+    destination: string
+
+    sprites: {
+      size: {
+        width: number
+        height: number
+      }
+
+      count: {
+        width: number
+        height: number
+      }
+
+      duration: number
+    }
+  }) {
+    const { path, destination, sprites } = options
+
+    const command = this.commandWrapper.buildCommand(path)
+
+    const filter = [
+      `setpts=N/round(FRAME_RATE)/TB`,
+      `select='not(mod(t,${options.sprites.duration}))'`,
+      `scale=${sprites.size.width}:${sprites.size.height}`,
+      `tile=layout=${sprites.count.width}x${sprites.count.height}`
+    ].join(',')
+
+    command.outputOption('-filter_complex', filter)
+    command.outputOption('-frames:v', '1')
+    command.outputOption('-q:v', '2')
+    command.output(destination)
+
+    return this.commandWrapper.runCommand()
+  }
 }
-- 
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