From 16688fae3c20ea60ff8f8ca71831c562f14027b4 Mon Sep 17 00:00:00 2001
From: Chris <christian@haschek.at>
Date: Sat, 22 Dec 2018 17:18:03 +0100
Subject: [PATCH] added mp4 preview image generation

---
 README.md                              |  3 ++-
 controllers/video/video.controller.php | 21 +++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 59491dc..b894e92 100644
--- a/README.md
+++ b/README.md
@@ -20,10 +20,10 @@ PictShare is a selfhostable, open source image, video and text hosting as well a
 - [x] Write permission detection
 
 ### Image hosting
-- [x] Upload of images
 - [ ] Resizing
 - [ ] Filters
 - [ ] Gif to mp4 conversion
+- [x] Upload of images
 
 ### Text file hosting
 - [x] Upload of text files
@@ -36,6 +36,7 @@ PictShare is a selfhostable, open source image, video and text hosting as well a
 
 ### MP4 hosting
 - [ ] Resizing
+- [x] Preview image generation
 - [x] Upload of videos
 - [x] Automatic conversion if not mobile friendly or wrong encoder used
 - [x] Render template for videos
\ No newline at end of file
diff --git a/controllers/video/video.controller.php b/controllers/video/video.controller.php
index f0c6877..8451d96 100644
--- a/controllers/video/video.controller.php
+++ b/controllers/video/video.controller.php
@@ -14,6 +14,18 @@ class VideoController
 
         if(in_array('raw',$url))
             $this->serveMP4($path,$hash);
+        else if(in_array('preview',$url))
+        {
+            $preview = ROOT.DS.'data'.DS.$hash.DS.'preview.jpg';
+            if(!file_exists($preview))
+            {
+                $this->saveFirstFrameOfMP4($path,$preview);
+            }
+
+            header ("Content-type: image/jpeg");
+            readfile($preview);
+            
+        }
         else if(in_array('download',$url))
         {
             if (file_exists($path)) {
@@ -174,4 +186,13 @@ class VideoController
         unlink(ROOT.DS.'tmp'.DS.$hash.'.txt');
         return false;
     }
+
+    function saveFirstFrameOfMP4($path,$target)
+	{
+		$bin = escapeshellcmd(FFMPEG_BINARY);
+		$file = escapeshellarg($path);
+		$cmd = "$bin -y -i $file -vframes 1 -f image2 $target";
+		
+		system($cmd);
+	}
 }
\ No newline at end of file