1 files changed, 92 insertions, 0 deletions

diff --git a/packages/ffmpeg/src/ffmpeg-images.ts b/packages/ffmpeg/src/ffmpeg-images.ts
new file mode 100644
index 000000000..4cd37aa80
--- /dev/null
+++ b/packages/ffmpeg/src/ffmpeg-images.ts
@@ -0,0 +1,92 @@
+import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper.js'
+import { getVideoStreamDuration } from './ffprobe.js'
+
+export class FFmpegImage {
+  private readonly commandWrapper: FFmpegCommandWrapper
+
+  constructor (options: FFmpegCommandWrapperOptions) {
+    this.commandWrapper = new FFmpegCommandWrapper(options)
+  }
+
+  convertWebPToJPG (options: {
+    path: string
+    destination: string
+  }): Promise<void> {
+    const { path, destination } = options
+
+    this.commandWrapper.buildCommand(path)
+      .output(destination)
+
+    return this.commandWrapper.runCommand({ silent: true })
+  }
+
+  processGIF (options: {
+    path: string
+    destination: string
+    newSize: { width: number, height: number }
+  }): Promise<void> {
+    const { path, destination, newSize } = options
+
+    this.commandWrapper.buildCommand(path)
+      .fps(20)
+      .size(`${newSize.width}x${newSize.height}`)
+      .output(destination)
+
+    return this.commandWrapper.runCommand()
+  }
+
+  async generateThumbnailFromVideo (options: {
+    fromPath: string
+    output: string
+  }) {
+    const { fromPath, output } = options
+
+    let duration = await getVideoStreamDuration(fromPath)
+    if (isNaN(duration)) duration = 0
+
+    this.commandWrapper.buildCommand(fromPath)
+      .seekInput(duration / 2)
+      .videoFilter('thumbnail=500')
+      .outputOption('-frames:v 1')
+      .output(output)
+
+    return this.commandWrapper.runCommand()
+  }
+
+  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()
+  }
+}