diff --git a/bin/ffx.py b/bin/ffx.py
index 79b94c7..8075c55 100755
--- a/bin/ffx.py
+++ b/bin/ffx.py
@@ -94,10 +94,14 @@ if not dtsBandwidth.endswith('k'):
 
 cropStart = ''
 cropLength = ''
-cropTokens = [c for c in sys.argv if c.startswith('crop=')]
+cropTokens = [c for c in sys.argv if c.startswith('crop')]
 if cropTokens:
-  cropString = cropTokens[0].split('=')[1]
-  cropStart, cropLength = cropString.split(',')
+    if '=' in cropTokens[0]:
+        cropString = cropTokens[0].split('=')[1]
+        cropStart, cropLength = cropString.split(',')
+    else:
+        cropStart = 60
+        cropLength = 180
 
 
 output = executeProcess(["ffprobe", "-show_streams", "-of", "json" ,inputFilename])