Set bitrate limits for transcoding (fixes #638) (#1135)

* Set bitrate limits for transcoding (fixes #638)

* added optimization script and test, changed stuff

* fix test, improve docs

* re-add optimize-old-videos script

* added documentation

* Don't optimize videos without valid UUID, or redundancy videos

* move getUUIDFromFilename

* fix tests?

* update torrent and file size, some more fixes/improvements

* use higher bitrate for high fps video, adjust bitrates

* add test video

* don't throw error if resolution is undefined

* generate test fixture on the fly

* use random noise video for bitrate test, add promise

* shorten test video to avoid timeout

* use existing function to optimize video

* various fixes

* increase test timeout

* limit test fixture size, add link

* test fixes

* add await

* more test fixes, add -b:v parameter

* replace ffmpeg wiki link

* fix ffmpeg params

* fix unit test

* add test fixture to .gitgnore

* add video transcoding fps model

* add missing file

1 files changed, 36 insertions, 0 deletions

diff --git a/scripts/optimize-old-videos.ts b/scripts/optimize-old-videos.ts
new file mode 100644
index 000000000..ab44acfbe
--- /dev/null
+++ b/scripts/optimize-old-videos.ts
@@ -0,0 +1,36 @@
+import { join } from 'path'
+import { readdir } from 'fs-extra'
+import { CONFIG, VIDEO_TRANSCODING_FPS } from '../server/initializers/constants'
+import { getVideoFileResolution, getVideoFileBitrate, getVideoFileFPS } from '../server/helpers/ffmpeg-utils'
+import { getMaxBitrate } from '../shared/models/videos'
+import { VideoRedundancyModel } from '../server/models/redundancy/video-redundancy'
+import { VideoModel } from '../server/models/video/video'
+import { getUUIDFromFilename } from '../server/helpers/utils'
+import { optimizeVideofile } from '../server/lib/video-transcoding'
+
+run()
+  .then(() => process.exit(0))
+  .catch(err => {
+    console.error(err)
+    process.exit(-1)
+  })
+
+async function run () {
+  const files = await readdir(CONFIG.STORAGE.VIDEOS_DIR)
+  for (const file of files) {
+    const inputPath = join(CONFIG.STORAGE.VIDEOS_DIR, file)
+    const videoBitrate = await getVideoFileBitrate(inputPath)
+    const fps = await getVideoFileFPS(inputPath)
+    const resolution = await getVideoFileResolution(inputPath)
+    const uuid = getUUIDFromFilename(file)
+
+    const isLocalVideo = await VideoRedundancyModel.isLocalByVideoUUIDExists(uuid)
+    const isMaxBitrateExceeded =
+      videoBitrate > getMaxBitrate(resolution.videoFileResolution, fps, VIDEO_TRANSCODING_FPS)
+    if (uuid && isLocalVideo && isMaxBitrateExceeded) {
+      const videoModel = await VideoModel.loadByUUIDWithFile(uuid)
+      await optimizeVideofile(videoModel, inputPath)
+    }
+  }
+  console.log('Finished optimizing videos')
+}