diff --git a/docker-compose.yml b/docker-compose.yml
index 81f5af3..0e8b94b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -26,3 +26,4 @@ services:
     - ALLOW_BLOATING=
     - FORCE_DOMAIN=
     - SHOW_ERRORS=
+    - FFMPEG_BINARY=
diff --git a/inc/core.php b/inc/core.php
index 2c3ad40..5d02165 100644
--- a/inc/core.php
+++ b/inc/core.php
@@ -1,6 +1,9 @@
 <?php
 spl_autoload_register('autoload');
 
+if(!defined('FFMPEG_BINARY') || !FFMPEG_BINARY)
+    define('FFMPEG_BINARY',ROOT.DS.'bin'.DS.'ffmpeg');
+
 function autoload($className)
 {
 	if (file_exists(ROOT . DS . 'models' . DS . strtolower($className) . '.php'))
diff --git a/inc/example.config.inc.php b/inc/example.config.inc.php
index 8cebf73..2dec85f 100644
--- a/inc/example.config.inc.php
+++ b/inc/example.config.inc.php
@@ -78,6 +78,7 @@ define('SHOW_ERRORS', false);
 //remove comments to use
 
 /* BACKBLAZE B2 */
+//========
 /* You can find your info here: https://secure.backblaze.com/b2_buckets.htm */
 //define('BACKBLAZE',true); //true=>use backblaze false=>don't
 //define('BACKBLAZE_ID','');
@@ -88,10 +89,21 @@ define('SHOW_ERRORS', false);
 //define('BACKBLAZE_AUTOUPLOAD', true);     //if true, will upload images to backblaze when they are uploaded to pictshare
 //define('BACKBLAZE_AUTODELETE', true);     //if true, will delete images from backblaze if they are deleted from pictshare
 
+
+//Backup Folder
+//========
 //If you have a NAS or some cifs or nfs mounted drive, you can specify this here as a folder
 //if a requested hash is not found locally, its looked up on this location. This allows for mounted external spaces
 //or just backups on a second drive.
-//Also new hashes will be uploaded there (just the originals, not resizes)
+//Also new hashes will be uploaded/copied there (just the originals, not resizes)
 //value should be a path **without tailing slash**!
 
-define('ALT_FOLDER','/mnt');
\ No newline at end of file
+//define('ALT_FOLDER','/mnt');
+
+//FFMPEG
+//========
+//If you are using PictShare on some other machine than x64 linux (eg raspberry pi or windows) the builtin ffmpeg binary won't work
+//this is why you can define an alternative path to the ffmpeg binary here.
+
+//define('FFMPEG_BINARY','/usr/bin/ffmpeg');
+
diff --git a/models/pictsharemodel.php b/models/pictsharemodel.php
index da408c4..85430da 100644
--- a/models/pictsharemodel.php
+++ b/models/pictsharemodel.php
@@ -895,7 +895,7 @@ class PictshareModel extends Model
 	{
 		$file = escapeshellarg($filename);
 		$tmp = ROOT.DS.'tmp'.DS.md5(time()+rand(1,10000)).'.'.rand(1,10000).'.log';
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		
 		$cmd = "$bin -i $file > $tmp 2>> $tmp";
 
@@ -921,7 +921,7 @@ class PictshareModel extends Model
 		$file = ROOT.DS.'upload'.DS.$data['hash'].DS.$data['hash'];
 		$file = escapeshellarg($file);
 		$tmp = '/dev/null';
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		
 		$size = $data['size'];
 		
@@ -949,7 +949,7 @@ class PictshareModel extends Model
 
 	function gifToMP4($gifpath,$target)
 	{
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		$file = escapeshellarg($gifpath);
 		
 		if(!file_exists($target)) //simple caching.. have to think of something better
@@ -964,7 +964,7 @@ class PictshareModel extends Model
 
 	function saveAsMP4($source,$target)
 	{
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		$source = escapeshellarg($source);
 		$target = escapeshellarg($target);
 		$h265 = "$bin -y -i $source -an -c:v libx264 -qp 0 -f mp4 $target";
@@ -973,7 +973,7 @@ class PictshareModel extends Model
 
 	function saveAsOGG($source,$target)
 	{
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		$source = escapeshellarg($source);
 		$target = escapeshellarg($target);
 		$h265 = "$bin -y -i $source -vcodec libtheora -acodec libvorbis -qp 0 -f ogg $target";
@@ -983,7 +983,7 @@ class PictshareModel extends Model
 	function saveAsWebm($source,$target)
 	{
 		return false;
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		$source = escapeshellarg($source);
 		$target = escapeshellarg($target);
 		$webm = "$bin -y -i $source -vcodec libvpx -acodec libvorbis -aq 5 -ac 2 -qmax 25 -f webm $target";
@@ -992,7 +992,7 @@ class PictshareModel extends Model
 
 	function saveFirstFrameOfMP4($path,$target)
 	{
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 		$file = escapeshellarg($path);
 		$cmd = "$bin -y -i $file -vframes 1 -f image2 $target";
 		
@@ -1003,7 +1003,7 @@ class PictshareModel extends Model
 	function getSizeOfMP4($video)
 	{
 		$video = escapeshellarg($video);
-		$bin = escapeshellcmd(ROOT.DS.'bin'.DS.'ffmpeg');
+		$bin = escapeshellcmd(FFMPEG_BINARY);
 	    $command = $bin . ' -i ' . $video . ' -vstats 2>&1';  
 	    $output = shell_exec($command);  
 
diff --git a/tools/re-encode_mp4.php b/tools/re-encode_mp4.php
index 6be05b8..b6d0d28 100644
--- a/tools/re-encode_mp4.php
+++ b/tools/re-encode_mp4.php
@@ -48,7 +48,7 @@ if(in_array('altfolder',$argv) && defined('ALT_FOLDER') && ALT_FOLDER && is_dir(
             echo "\n [i] $filename is ..\t";
             $valid = checkFileForValidMP4($img);
             $tmp = ROOT.DS.'tmp'.DS.$hash;
-            $cmd = ROOT.DS.'bin'.DS."ffmpeg -loglevel panic -y -i $img -vcodec libx264 -an -profile:v baseline -level 3.0 -pix_fmt yuv420p -vf \"scale=trunc(iw/2)*2:trunc(ih/2)*2\" $tmp && cp $tmp $img";
+            $cmd = FFMPEG_BINARY." -loglevel panic -y -i $img -vcodec libx264 -an -profile:v baseline -level 3.0 -pix_fmt yuv420p -vf \"scale=trunc(iw/2)*2:trunc(ih/2)*2\" $tmp && cp $tmp $img";
             echo ($valid?'Valid'."\n":'Not valid => Converting..');
             if(!$valid)
             {
@@ -98,7 +98,7 @@ foreach($localfiles as $hash)
 {
     $mp4 = $dir.$hash.DS.$hash;
     $tmp = ROOT.DS.'tmp'.DS.$hash;
-    $cmd = ROOT.DS.'bin'.DS."ffmpeg -loglevel panic -y -i $mp4 -vcodec libx264 -an -profile:v baseline -level 3.0 -pix_fmt yuv420p -vf \"scale=trunc(iw/2)*2:trunc(ih/2)*2\" $tmp && cp $tmp $mp4";
+    $cmd = FFMPEG_BINARY." -loglevel panic -y -i $mp4 -vcodec libx264 -an -profile:v baseline -level 3.0 -pix_fmt yuv420p -vf \"scale=trunc(iw/2)*2:trunc(ih/2)*2\" $tmp && cp $tmp $mp4";
     echo "  [i] Converting '$hash'";
     system($cmd);
     if(defined('ALT_FOLDER') && ALT_FOLDER && is_dir(ALT_FOLDER))
@@ -110,7 +110,7 @@ foreach($localfiles as $hash)
 function checkFileForValidMP4($file)
 {
     $hash = md5($file);
-    $cmd = ROOT.DS.'bin'.DS."ffmpeg -i $file -hide_banner 2> ".ROOT.DS.'tmp'.DS.$hash.'.txt';
+    $cmd = FFMPEG_BINARY." -i $file -hide_banner 2> ".ROOT.DS.'tmp'.DS.$hash.'.txt';
     system($cmd);
     $results = file(ROOT.DS.'tmp'.DS.$hash.'.txt');
     foreach($results as $l)
diff --git a/tools/render_webm_ogg.php b/tools/render_webm_ogg.php
index 727aee6..fd3b49f 100644
--- a/tools/render_webm_ogg.php
+++ b/tools/render_webm_ogg.php
@@ -65,7 +65,7 @@ foreach($localfiles as $hash)
         else
         {
             echo "  [OGG] User wants OGG. Will do.. ";
-            $cmd = "../bin/ffmpeg -y -i $img -loglevel panic -vcodec libtheora -an $tmp && cp $tmp $ogg";
+            $cmd = FFMPEG_BINARY." -y -i $img -loglevel panic -vcodec libtheora -an $tmp && cp $tmp $ogg";
             system($cmd);
             echo "done\n";
         }
@@ -80,7 +80,7 @@ foreach($localfiles as $hash)
         else
         {
             echo "  [WEBM] User wants WEBM. Will do.. ";
-            $cmd = "../bin/ffmpeg -y -i $img -loglevel panic -c:v libvpx -crf 10 -b:v 1M $tmp && cp $tmp $webm";
+            $cmd = FFMPEG_BINARY." -y -i $img -loglevel panic -c:v libvpx -crf 10 -b:v 1M $tmp && cp $tmp $webm";
             system($cmd);
             echo "done\n";
         }