2 files changed, 17 insertions, 7 deletions

diff --git a/server/helpers/utils.ts b/server/helpers/utils.ts
index 7a4c781cc..11c118292 100644
--- a/server/helpers/utils.ts
+++ b/server/helpers/utils.ts
@@ -7,6 +7,7 @@ import { Instance as ParseTorrent } from 'parse-torrent'
 import { remove } from 'fs-extra'
 import * as memoizee from 'memoizee'
 import { CONFIG } from '../initializers/config'
+import { isVideoFileExtnameValid } from './custom-validators/videos'
 
 function deleteFileAsync (path: string) {
   remove(path)
@@ -42,11 +43,18 @@ const getServerActor = memoizee(async function () {
   return actor
 }, { promise: true })
 
-function generateVideoImportTmpPath (target: string | ParseTorrent) {
-  const id = typeof target === 'string' ? target : target.infoHash
+function generateVideoImportTmpPath (target: string | ParseTorrent, extensionArg?: string) {
+  const id = typeof target === 'string'
+    ? target
+    : target.infoHash
+
+  let extension = '.mp4'
+  if (extensionArg && isVideoFileExtnameValid(extensionArg)) {
+    extension = extensionArg
+  }
 
   const hash = sha256(id)
-  return join(CONFIG.STORAGE.TMP_DIR, hash + '-import.mp4')
+  return join(CONFIG.STORAGE.TMP_DIR, `${hash}-import${extension}`)
 }
 
 function getSecureTorrentName (originalName: string) {
diff --git a/server/helpers/youtube-dl.ts b/server/helpers/youtube-dl.ts
index 26dbe6543..07c85797a 100644
--- a/server/helpers/youtube-dl.ts
+++ b/server/helpers/youtube-dl.ts
@@ -16,6 +16,7 @@ export type YoutubeDLInfo = {
   nsfw?: boolean
   tags?: string[]
   thumbnailUrl?: string
+  fileExt?: string
   originallyPublishedAt?: Date
 }
 
@@ -44,11 +45,11 @@ function getYoutubeDLInfo (url: string, opts?: string[]): Promise<YoutubeDLInfo>
   })
 }
 
-function downloadYoutubeDLVideo (url: string, timeout: number) {
-  const path = generateVideoImportTmpPath(url)
+function downloadYoutubeDLVideo (url: string, extension: string, timeout: number) {
+  const path = generateVideoImportTmpPath(url, extension)
   let timer
 
-  logger.info('Importing youtubeDL video %s', url)
+  logger.info('Importing youtubeDL video %s to %s', url, path)
 
   let options = [ '-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best', '-o', path ]
   options = wrapWithProxyOptions(options)
@@ -219,7 +220,8 @@ function buildVideoInfo (obj: any) {
     nsfw: isNSFW(obj),
     tags: getTags(obj.tags),
     thumbnailUrl: obj.thumbnail || undefined,
-    originallyPublishedAt: buildOriginallyPublishedAt(obj)
+    originallyPublishedAt: buildOriginallyPublishedAt(obj),
+    fileExt: obj.ext
   }
 }