2 files changed, 21 insertions, 11 deletions

diff --git a/server/initializers/checker-after-init.ts b/server/initializers/checker-after-init.ts
index 2b00e2047..a93c8b7fd 100644
--- a/server/initializers/checker-after-init.ts
+++ b/server/initializers/checker-after-init.ts
@@ -1,16 +1,17 @@
 import * as config from 'config'
-import { isProdInstance, isTestInstance } from '../helpers/core-utils'
-import { UserModel } from '../models/account/user'
-import { getServerActor, ApplicationModel } from '../models/application/application'
-import { OAuthClientModel } from '../models/oauth/oauth-client'
+import { uniq } from 'lodash'
 import { URL } from 'url'
-import { CONFIG, isEmailEnabled } from './config'
-import { logger } from '../helpers/logger'
+import { getFFmpegVersion } from '@server/helpers/ffmpeg-utils'
+import { VideoRedundancyConfigFilter } from '@shared/models/redundancy/video-redundancy-config-filter.type'
 import { RecentlyAddedStrategy } from '../../shared/models/redundancy'
+import { isProdInstance, isTestInstance, parseSemVersion } from '../helpers/core-utils'
 import { isArray } from '../helpers/custom-validators/misc'
-import { uniq } from 'lodash'
+import { logger } from '../helpers/logger'
+import { UserModel } from '../models/account/user'
+import { ApplicationModel, getServerActor } from '../models/application/application'
+import { OAuthClientModel } from '../models/oauth/oauth-client'
+import { CONFIG, isEmailEnabled } from './config'
 import { WEBSERVER } from './constants'
-import { VideoRedundancyConfigFilter } from '@shared/models/redundancy/video-redundancy-config-filter.type'
 
 async function checkActivityPubUrls () {
   const actor = await getServerActor()
@@ -176,11 +177,21 @@ async function applicationExist () {
   return totalApplication !== 0
 }
 
+async function checkFFmpegVersion () {
+  const version = await getFFmpegVersion()
+  const { major, minor } = parseSemVersion(version)
+
+  if (major < 4 || (major === 4 && minor < 1)) {
+    logger.warn('Your ffmpeg version (%s) is outdated. PeerTube supports ffmpeg >= 4.1. Please upgrade.', version)
+  }
+}
+
 // ---------------------------------------------------------------------------
 
 export {
   checkConfig,
   clientsExist,
+  checkFFmpegVersion,
   usersExist,
   applicationExist,
   checkActivityPubUrls
diff --git a/server/initializers/checker-before-init.ts b/server/initializers/checker-before-init.ts
index 565e0d1fa..65a019ca6 100644
--- a/server/initializers/checker-before-init.ts
+++ b/server/initializers/checker-before-init.ts
@@ -1,5 +1,5 @@
 import * as config from 'config'
-import { promisify0 } from '../helpers/core-utils'
+import { parseSemVersion, promisify0 } from '../helpers/core-utils'
 import { logger } from '../helpers/logger'
 
 // ONLY USE CORE MODULES IN THIS FILE!
@@ -102,8 +102,7 @@ async function checkFFmpeg (CONFIG: { TRANSCODING: { ENABLED: boolean } }) {
 
 function checkNodeVersion () {
   const v = process.version
-  const majorString = v.split('.')[0].replace('v', '')
-  const major = parseInt(majorString, 10)
+  const { major } = parseSemVersion(v)
 
   logger.debug('Checking NodeJS version %s.', v)