From 0c9668f77901e7540e2c7045eb0f2974a4842a69 Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Fri, 21 Apr 2023 14:55:10 +0200
Subject: Implement remote runner jobs in server

Move ffmpeg functions to @shared
---
 server/helpers/ffmpeg/codecs.ts | 64 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 server/helpers/ffmpeg/codecs.ts

(limited to 'server/helpers/ffmpeg/codecs.ts')

diff --git a/server/helpers/ffmpeg/codecs.ts b/server/helpers/ffmpeg/codecs.ts
new file mode 100644
index 000000000..3bd7db396
--- /dev/null
+++ b/server/helpers/ffmpeg/codecs.ts
@@ -0,0 +1,64 @@
+import { FfprobeData } from 'fluent-ffmpeg'
+import { getAudioStream, getVideoStream } from '@shared/ffmpeg'
+import { logger } from '../logger'
+import { forceNumber } from '@shared/core-utils'
+
+export async function getVideoStreamCodec (path: string) {
+  const videoStream = await getVideoStream(path)
+  if (!videoStream) return ''
+
+  const videoCodec = videoStream.codec_tag_string
+
+  if (videoCodec === 'vp09') return 'vp09.00.50.08'
+  if (videoCodec === 'hev1') return 'hev1.1.6.L93.B0'
+
+  const baseProfileMatrix = {
+    avc1: {
+      High: '6400',
+      Main: '4D40',
+      Baseline: '42E0'
+    },
+    av01: {
+      High: '1',
+      Main: '0',
+      Professional: '2'
+    }
+  }
+
+  let baseProfile = baseProfileMatrix[videoCodec][videoStream.profile]
+  if (!baseProfile) {
+    logger.warn('Cannot get video profile codec of %s.', path, { videoStream })
+    baseProfile = baseProfileMatrix[videoCodec]['High'] // Fallback
+  }
+
+  if (videoCodec === 'av01') {
+    let level = videoStream.level.toString()
+    if (level.length === 1) level = `0${level}`
+
+    // Guess the tier indicator and bit depth
+    return `${videoCodec}.${baseProfile}.${level}M.08`
+  }
+
+  let level = forceNumber(videoStream.level).toString(16)
+  if (level.length === 1) level = `0${level}`
+
+  // Default, h264 codec
+  return `${videoCodec}.${baseProfile}${level}`
+}
+
+export async function getAudioStreamCodec (path: string, existingProbe?: FfprobeData) {
+  const { audioStream } = await getAudioStream(path, existingProbe)
+
+  if (!audioStream) return ''
+
+  const audioCodecName = audioStream.codec_name
+
+  if (audioCodecName === 'opus') return 'opus'
+  if (audioCodecName === 'vorbis') return 'vorbis'
+  if (audioCodecName === 'aac') return 'mp4a.40.2'
+  if (audioCodecName === 'mp3') return 'mp4a.40.34'
+
+  logger.warn('Cannot get audio codec of %s.', path, { audioStream })
+
+  return 'mp4a.40.2' // Fallback
+}
-- 
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