allow no input output

diff --git a/bin/mastering/mastering.py b/bin/mastering/mastering.py
index 738e2fe06310ad757e1327dd1cf31b6f65888c0f..20e08ea08e4cf7009688dfbfec28f72e60767a6f 100755 (executable)
--- a/bin/mastering/mastering.py
+++ b/bin/mastering/mastering.py
@@ -209,8 +209,8 @@ def main():
     parser.add_argument('-f', '--force', help='force mode', action="store_true")
     parser.add_argument('-v', '--verbose', help='verbose mode', action="store_true")
     parser.add_argument('-r', '--remux_only', help='remux only mode', action="store_true")
-    parser.add_argument('-i','--input_formats', nargs='+', help='Required input formats', required=True)
-    parser.add_argument('-o','--output_formats', nargs='+', help='Required output formats', required=True)
+    parser.add_argument('-i','--input_formats', nargs='+', help='Required input formats')
+    parser.add_argument('-o','--output_formats', nargs='+', help='Required output formats')
 
     args = parser.parse_args()
     t = TeleCasterMastering(args)