diff --git a/bin/ffx.py b/bin/ffx.py
index 1b9dcef..aede965 100755
--- a/bin/ffx.py
+++ b/bin/ffx.py
@@ -48,7 +48,7 @@ def generateOutputTokens(f, q=''):
     if q:
         fTokens = f.split('.')
         paddedFilename = '.'.join(fTokens[:-1]) + f" q{q}" + '.' + fTokens[-1]
-        return ['-f', 'webm', paddedFilename]    
+        return ['-f', 'webm', paddedFilename]
     else:
         return ['-f', 'webm', f]
 
@@ -116,7 +116,10 @@ audioStreams = [s for s in streamData if s['codec_type'] == 'audio']
 subtitleStreams = [s for s in streamData if s['codec_type'] == 'subtitle']
 
 for aStream in audioStreams:
-    print(f"audio stream: {aStream['channel_layout']}")
+    if 'channel_layout' in aStream.keys():
+        print(f"audio stream: {aStream['channel_layout']}") #channel_layout
+    else:
+        print(f"unknown audio stream with {aStream['channels']} channels") #channel_layout
 
 commandTokens = ['ffmpeg', '-y', '-i', inputFilename]
 
@@ -133,29 +136,42 @@ for s in range(len(subtitleStreams)):
 audioTokens = []
 audioStreamIndex = 0
 for aStream in audioStreams:
-    channelLayout = aStream['channel_layout']
-
-    if channelLayout == '6.1':
-        audioTokens += [f"-c:a:{audioStreamIndex}",
-                        'libopus',
-                        f"-filter:a:{audioStreamIndex}",
-                        'channelmap=channel_layout=6.1',
-                        f"-b:a:{audioStreamIndex}",
-                        dtsBandwidth]
-
-    if channelLayout == '5.1(side)':
-        audioTokens += [f"-c:a:{audioStreamIndex}",
-                        'libopus',
-                        f"-filter:a:{audioStreamIndex}",
-                        "channelmap=FL-FL|FR-FR|FC-FC|LFE-LFE|SL-BL|SR-BR:5.1",
-                        f"-b:a:{audioStreamIndex}",
-                        ac3Bandwidth]
-
-    if channelLayout == 'stereo':
-        audioTokens += [f"-c:a:{audioStreamIndex}",
-                        'libopus',
-                        f"-b:a:{audioStreamIndex}",
-                        stereoBandwidth]
+
+    channels = aStream['channels']
+
+    if 'channel_layout' in aStream.keys():
+
+        channelLayout = aStream['channel_layout']
+
+        if channelLayout == '6.1':
+            audioTokens += [f"-c:a:{audioStreamIndex}",
+                            'libopus',
+                            f"-filter:a:{audioStreamIndex}",
+                            'channelmap=channel_layout=6.1',
+                            f"-b:a:{audioStreamIndex}",
+                            dtsBandwidth]
+
+        if channelLayout == '5.1(side)':
+            audioTokens += [f"-c:a:{audioStreamIndex}",
+                            'libopus',
+                            f"-filter:a:{audioStreamIndex}",
+                            "channelmap=FL-FL|FR-FR|FC-FC|LFE-LFE|SL-BL|SR-BR:5.1",
+                            f"-b:a:{audioStreamIndex}",
+                            ac3Bandwidth]
+
+        if channelLayout == 'stereo':
+            audioTokens += [f"-c:a:{audioStreamIndex}",
+                            'libopus',
+                            f"-b:a:{audioStreamIndex}",
+                            stereoBandwidth]
+    else:
+
+        if channels == 6:
+            audioTokens += [f"-c:a:{audioStreamIndex}",
+                            'libopus',
+                            f"-b:a:{audioStreamIndex}",
+                            ac3Bandwidth]
+
 
     audioStreamIndex += 1