1 files changed, 64 insertions, 0 deletions

diff --git a/server/scripts/regenerate-thumbnails.ts b/server/scripts/regenerate-thumbnails.ts
new file mode 100644
index 000000000..d4346ce40
--- /dev/null
+++ b/server/scripts/regenerate-thumbnails.ts
@@ -0,0 +1,64 @@
+import Bluebird from 'bluebird'
+import { program } from 'commander'
+import { pathExists, remove } from 'fs-extra/esm'
+import { generateImageFilename, processImage } from '@server/helpers/image-utils.js'
+import { THUMBNAILS_SIZE } from '@server/initializers/constants.js'
+import { initDatabaseModels } from '@server/initializers/database.js'
+import { VideoModel } from '@server/models/video/video.js'
+
+program
+  .description('Regenerate local thumbnails using preview files')
+  .parse(process.argv)
+
+run()
+  .then(() => process.exit(0))
+  .catch(err => console.error(err))
+
+async function run () {
+  await initDatabaseModels(true)
+
+  const ids = await VideoModel.listLocalIds()
+
+  await Bluebird.map(ids, id => {
+    return processVideo(id)
+      .catch(err => console.error('Cannot process video %d.', id, err))
+  }, { concurrency: 20 })
+}
+
+async function processVideo (id: number) {
+  const video = await VideoModel.loadWithFiles(id)
+
+  console.log('Processing video %s.', video.name)
+
+  const thumbnail = video.getMiniature()
+  const preview = video.getPreview()
+
+  const previewPath = preview.getPath()
+
+  if (!await pathExists(previewPath)) {
+    throw new Error(`Preview ${previewPath} does not exist on disk`)
+  }
+
+  const size = {
+    width: THUMBNAILS_SIZE.width,
+    height: THUMBNAILS_SIZE.height
+  }
+
+  const oldPath = thumbnail.getPath()
+
+  // Update thumbnail
+  thumbnail.filename = generateImageFilename()
+  thumbnail.width = size.width
+  thumbnail.height = size.height
+
+  const thumbnailPath = thumbnail.getPath()
+  await processImage({ path: previewPath, destination: thumbnailPath, newSize: size, keepOriginal: true })
+
+  // Save new attributes
+  await thumbnail.save()
+
+  // Remove old thumbnail
+  await remove(oldPath)
+
+  // Don't federate, remote instances will refresh the thumbnails after a while
+}