diff --git a/lib/classes/video.js b/lib/classes/video.js
index a024aa9..077a8d0 100644
--- a/lib/classes/video.js
+++ b/lib/classes/video.js
@@ -797,6 +797,12 @@ class Video {
                         _self.ffmpegCommand.audioChannels(2).audioFilters('aresample=matrix_encoding=dplii');
                         stream.channels = 2;
                     }
+		    else if (stream.channels == 6) {
+			_self.ffmpegCommand.audioChannels(6).audioFilters('channelmap=channel_layout=5.1');
+		    }
+		    else if (stream.channels == 8) {
+			_self.ffmpegCommand.audioChannels(6).audioFilters('channelmap=channel_layout=7.1');
+		    }
 
                     let bitrate = _self.options.HEAudioBitrate * stream.channels;
                     _self.ffmpegCommand.outputOptions('-b:a:' + i, bitrate + 'k');
@@ -918,7 +924,7 @@ class Video {
                     if (err.message.startsWith('ffmpeg was killed with signal'))
                         reject(new Error('FFMPEGKILLED'));
                     else
-                        reject(new Error('ffmpeg exited with an error.'));
+                        reject(new Error('ffmpeg exited with an error.' + stdout + stderr));
                 });
             _self.ffmpegCommand.output(_self.output.path, {
                 end: true