2 files changed, 33 insertions, 2 deletions

diff --git a/server/helpers/core-utils.ts b/server/helpers/core-utils.ts
index 7ba7d865a..ceb6a341d 100644
--- a/server/helpers/core-utils.ts
+++ b/server/helpers/core-utils.ts
@@ -251,6 +251,16 @@ function promisify2<T, U, A> (func: (arg1: T, arg2: U, cb: (err: any, result: A)
   }
 }
 
+function parseSemVersion (s: string) {
+  const parsed = s.match(/^v?(\d+)\.(\d+)\.(\d+)$/i)
+
+  return {
+    major: parseInt(parsed[1]),
+    minor: parseInt(parsed[2]),
+    patch: parseInt(parsed[3])
+  }
+}
+
 const randomBytesPromise = promisify1<number, Buffer>(randomBytes)
 const createPrivateKey = promisify1<number, { key: string }>(pem.createPrivateKey)
 const getPublicKey = promisify1<string, { publicKey: string }>(pem.getPublicKey)
@@ -288,5 +298,7 @@ export {
   getPublicKey,
   execPromise2,
   execPromise,
-  pipelinePromise
+  pipelinePromise,
+
+  parseSemVersion
 }
diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts
index 620025966..69cd397b9 100644
--- a/server/helpers/ffmpeg-utils.ts
+++ b/server/helpers/ffmpeg-utils.ts
@@ -5,7 +5,7 @@ import { dirname, join } from 'path'
 import { FFMPEG_NICE, VIDEO_LIVE } from '@server/initializers/constants'
 import { AvailableEncoders, EncoderOptionsBuilder, EncoderProfile, VideoResolution } from '../../shared/models/videos'
 import { CONFIG } from '../initializers/config'
-import { promisify0 } from './core-utils'
+import { execPromise, promisify0 } from './core-utils'
 import { computeFPS, getAudioStream, getVideoFileFPS } from './ffprobe-utils'
 import { processImage } from './image-utils'
 import { logger } from './logger'
@@ -649,6 +649,24 @@ function getFFmpeg (input: string, type: 'live' | 'vod') {
   return command
 }
 
+function getFFmpegVersion () {
+  return new Promise<string>((res, rej) => {
+    (ffmpeg() as any)._getFfmpegPath((err, ffmpegPath) => {
+      if (err) return rej(err)
+      if (!ffmpegPath) return rej(new Error('Could not find ffmpeg path'))
+
+      return execPromise(`${ffmpegPath} -version`)
+        .then(stdout => {
+          const parsed = stdout.match(/ffmpeg version .(\d+\.\d+\.\d+)/)
+          if (!parsed || !parsed[1]) return rej(new Error(`Could not find ffmpeg version in ${stdout}`))
+
+          return res(parsed[1])
+        })
+        .catch(err => rej(err))
+    })
+  })
+}
+
 async function runCommand (options: {
   command: ffmpeg.FfmpegCommand
   silent?: boolean // false
@@ -695,6 +713,7 @@ export {
   TranscodeOptionsType,
   transcode,
   runCommand,
+  getFFmpegVersion,
 
   resetSupportedEncoders,