From 601c8cebc9eaaa7cf5254350c32f9741d2dd05d6 Mon Sep 17 00:00:00 2001
From: 27chan <gameover@hotmail.com.br>
Date: Mon, 10 Aug 2015 22:13:42 -0300
Subject: [PATCH] Add extension mp4

---
 inc/lib/webm/ffmpeg.php | 53 +++++++++++++++++++++--------------------
 1 file changed, 27 insertions(+), 26 deletions(-)

diff --git a/inc/lib/webm/ffmpeg.php b/inc/lib/webm/ffmpeg.php
index edd2c73a..faf90608 100644
--- a/inc/lib/webm/ffmpeg.php
+++ b/inc/lib/webm/ffmpeg.php
@@ -3,60 +3,61 @@
 * ffmpeg.php
 * A barebones ffmpeg based webm implementation for vichan.
 */
-
 function get_webm_info($filename) {
   global $board, $config;
-
   $filename = escapeshellarg($filename);
   $ffprobe = $config['webm']['ffprobe_path'];
   $ffprobe_out = array();
   $webminfo = array();
-
   exec("$ffprobe -v quiet -print_format json -show_format -show_streams $filename", $ffprobe_out);
   $ffprobe_out = json_decode(implode("\n", $ffprobe_out), 1);
   $webminfo['error'] = is_valid_webm($ffprobe_out);
-
   if(empty($webminfo['error'])) {
     $webminfo['width'] = $ffprobe_out['streams'][0]['width'];
     $webminfo['height'] = $ffprobe_out['streams'][0]['height'];
+    $webminfo['duration'] = $ffprobe_out['format']['duration'];
   }
-
   return $webminfo;
 }
-
 function is_valid_webm($ffprobe_out) {
   global $board, $config;
-
   if (empty($ffprobe_out))
     return array('code' => 1, 'msg' => $config['error']['genwebmerror']);
-
-  if ($ffprobe_out['format']['format_name'] != 'matroska,webm')
-    return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
-
+  $extension = pathinfo($ffprobe_out['format']['filename'], PATHINFO_EXTENSION);
+  if ($extension === 'webm') {
+    if ($ffprobe_out['format']['format_name'] != 'matroska,webm')
+      return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
+  } elseif ($extension === 'mp4') {
+    if ($ffprobe_out['streams'][0]['codec_name'] != 'h264' && $ffprobe_out['streams'][1]['codec_name'] != 'aac')
+      return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
+  } else {
+    return array('code' => 1, 'msg' => $config['error']['genwebmerror']);  
+  }
   if ((count($ffprobe_out['streams']) > 1) && (!$config['webm']['allow_audio']))
     return array('code' => 3, 'msg' => $config['error']['webmhasaudio']);
-
-  if ($ffprobe_out['streams'][0]['codec_name'] != 'vp8')
-    return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
-
   if (empty($ffprobe_out['streams'][0]['width']) || (empty($ffprobe_out['streams'][0]['height'])))
     return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
-
   if ($ffprobe_out['format']['duration'] > $config['webm']['max_length'])
-    return array('code' => 4, 'msg' => $config['error']['webmtoolong']);
+    return array('code' => 4, 'msg' => sprintf($config['error']['webmtoolong'], $config['webm']['max_length']));
 }
-
-function make_webm_thumbnail($filename, $thumbnail, $width, $height) {
+function make_webm_thumbnail($filename, $thumbnail, $width, $height, $duration) {
   global $board, $config;
-
   $filename = escapeshellarg($filename);
-  $thumbnail = escapeshellarg($thumbnail); // Should be safe by default but you
+  $thumbnailfc = escapeshellarg($thumbnail); // Should be safe by default but you
                                            // can never be too safe.
-
   $ffmpeg = $config['webm']['ffmpeg_path'];
+  $ret = 0;
   $ffmpeg_out = array();
-
-  exec("$ffmpeg -i $filename -v quiet -ss 00:00:00 -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnail 2>&1");
-
-  return count($ffmpeg_out);
+  exec("$ffmpeg -strict -2 -ss " . floor($duration / 2) . " -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnailfc 2>&1", $ffmpeg_out, $ret);
+  // Work around for https://trac.ffmpeg.org/ticket/4362
+  if (filesize($thumbnail) === 0) {
+    // try again with first frame
+    exec("$ffmpeg -y -strict -2 -ss 0 -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnailfc 2>&1", $ffmpeg_out, $ret);
+    clearstatcache();
+    // failed if no thumbnail size even if ret code 0, ffmpeg is buggy
+    if (filesize($thumbnail) === 0) {
+      $ret = 1;
+    }
+  }
+  return $ret;
 }