diff --git a/lib/Alchemy/Phrasea/Filesystem/FilesystemService.php b/lib/Alchemy/Phrasea/Filesystem/FilesystemService.php
index 1a782400ad..a3db77e635 100644
--- a/lib/Alchemy/Phrasea/Filesystem/FilesystemService.php
+++ b/lib/Alchemy/Phrasea/Filesystem/FilesystemService.php
@@ -67,6 +67,20 @@ class FilesystemService
         return $pathdest . $this->generateSubdefFilename($record, $subdef);
     }
 
+    public function generateTemporarySubdefPathname(\record_adapter $record, \databox_subdef $subdef, $tmpDir)
+    {
+        $tmpDir = \p4string::addEndSlash($tmpDir);
+        $ffmpegDir = $tmpDir."ffmpeg/";
+
+        if(!is_dir($ffmpegDir)){
+            $this->filesystem->mkdir($ffmpegDir);
+        }
+
+        $filenameSufix = $this->generateSubdefFilename($record, $subdef);
+
+        return $ffmpegDir . hash('sha256', $filenameSufix) . $filenameSufix;
+    }
+
     /**
      * @param RecordInterface $record
      * @param string|\SplFileInfo $source
diff --git a/lib/Alchemy/Phrasea/Media/SubdefGenerator.php b/lib/Alchemy/Phrasea/Media/SubdefGenerator.php
index c60c4d3b7b..037b3d8f51 100644
--- a/lib/Alchemy/Phrasea/Media/SubdefGenerator.php
+++ b/lib/Alchemy/Phrasea/Media/SubdefGenerator.php
@@ -22,6 +22,7 @@ use Alchemy\Phrasea\Filesystem\FilesystemService;
 use Alchemy\Phrasea\Media\Subdef\Specification\PdfSpecification;
 use MediaAlchemyst\Alchemyst;
 use MediaAlchemyst\Specification\Image;
+use MediaAlchemyst\Specification\Video;
 use MediaVorus\MediaVorus;
 use MediaAlchemyst\Exception\ExceptionInterface as MediaAlchemystException;
 use Neutron\TemporaryFilesystem\Manager;
@@ -173,6 +174,14 @@ class SubdefGenerator
                 return;
             }
 
+            $tmpDir = $this->app['conf']->get(['main', 'storage', 'tmp_files']);
+            $destFile = null;
+
+            if($subdef_class->getSpecs() instanceof Video && !empty($tmpDir)){
+                $destFile = $pathdest;
+                $pathdest = $this->filesystem->generateTemporarySubdefPathname($record, $subdef_class, $tmpDir);
+            }
+
             if (isset($this->tmpFilePath) && $subdef_class->getSpecs() instanceof Image) {
 
                 $this->alchemyst->turnInto($this->tmpFilePath, $pathdest, $subdef_class->getSpecs());
@@ -187,6 +196,11 @@ class SubdefGenerator
 
             }
 
+            if($destFile){
+                $this->filesystem->copy($pathdest, $destFile);
+                $this->app['filesystem']->remove($pathdest);
+            }
+
         } catch (MediaAlchemystException $e) {
             $this->logger->error(sprintf('Subdef generation failed for record %d with message %s', $record->getRecordId(), $e->getMessage()));
         }