From 57df02b30955a030f2f8bf062e963ea3be7ac2f4 Mon Sep 17 00:00:00 2001
From: Markerov <mark.taiwan@gmail.com>
Date: Sat, 29 Nov 2014 01:30:18 +0800
Subject: [PATCH 1/2] initial commit

generate the thumbnail from the middle of the video
---
 inc/lib/webm/ffmpeg.php      | 5 +++--
 inc/lib/webm/posthandler.php | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/inc/lib/webm/ffmpeg.php b/inc/lib/webm/ffmpeg.php
index 8e4076d1..405dbdf1 100644
--- a/inc/lib/webm/ffmpeg.php
+++ b/inc/lib/webm/ffmpeg.php
@@ -19,6 +19,7 @@ function get_webm_info($filename) {
   if(empty($webminfo['error'])) {
     $webminfo['width'] = $ffprobe_out['streams'][0]['width'];
     $webminfo['height'] = $ffprobe_out['streams'][0]['height'];
+    $webminfo['duration'] = $ffprobe_out['format']['duration'];
   }
 
   return $webminfo;
@@ -52,7 +53,7 @@ function is_valid_webm($ffprobe_out) {
     return array('code' => 4, 'msg' => $config['error']['webmtoolong']);
 }
 
-function make_webm_thumbnail($filename, $thumbnail, $width, $height) {
+function make_webm_thumbnail($filename, $thumbnail, $width, $height, $duration) {
   global $board, $config;
 
   $filename = escapeshellarg($filename);
@@ -62,7 +63,7 @@ function make_webm_thumbnail($filename, $thumbnail, $width, $height) {
 
   $ret = 0;
   $ffmpeg_out = array();
-  exec("$ffmpeg -strict -2 -i $filename -v quiet -ss 00:00:00 -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnail 2>&1", $ffmpeg_out, $ret);
+  exec("$ffmpeg -strict -2 -ss " . $duration / 2 . " -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnail 2>&1", $ffmpeg_out, $ret);
 
   return $ret;
 }
diff --git a/inc/lib/webm/posthandler.php b/inc/lib/webm/posthandler.php
index 18b4186f..2889cd9f 100644
--- a/inc/lib/webm/posthandler.php
+++ b/inc/lib/webm/posthandler.php
@@ -21,7 +21,7 @@ function postHandler($post) {
             $file = set_thumbnail_dimensions($post, $file);
             $tn_path = $board['dir'] . $config['dir']['thumb'] . $file->file_id . '.jpg';
 
-            if(0 == make_webm_thumbnail($file->file_path, $tn_path, $file->thumbwidth, $file->thumbheight)) {
+            if(0 == make_webm_thumbnail($file->file_path, $tn_path, $file->thumbwidth, $file->thumbheight, $webminfo['duration'])) {
               $file->thumb = $file->file_id . '.jpg';
             }
             else {

From 7011fdf9c27b7ce42cd3d77e1d2992a2b2b1e2eb Mon Sep 17 00:00:00 2001
From: Markerov <mark.taiwan@gmail.com>
Date: Wed, 7 Jan 2015 03:18:24 +0800
Subject: [PATCH 2/2] round starting time down to nearest second

---
 inc/lib/webm/ffmpeg.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/lib/webm/ffmpeg.php b/inc/lib/webm/ffmpeg.php
index 405dbdf1..485e4702 100644
--- a/inc/lib/webm/ffmpeg.php
+++ b/inc/lib/webm/ffmpeg.php
@@ -63,7 +63,7 @@ function make_webm_thumbnail($filename, $thumbnail, $width, $height, $duration)
 
   $ret = 0;
   $ffmpeg_out = array();
-  exec("$ffmpeg -strict -2 -ss " . $duration / 2 . " -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnail 2>&1", $ffmpeg_out, $ret);
+  exec("$ffmpeg -strict -2 -ss " . floor($duration / 2) . " -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnail 2>&1", $ffmpeg_out, $ret);
 
   return $ret;
 }