Update dependency requirements

setup.py

@@ -19,11 +19,14 @@ setup(
                 'src/mailbox.c',
                 'src/python/_rpitxmodule.c',
                 'src/raspberry_pi_revision.c',
-            ],
+                ],
             extra_link_args=['-lrt', '-lsndfile'],
-        ),
-    ],
+            ),
+        ],
     packages=['rpitx'],
     package_dir={'': 'src/python'},
-    install_requires=['pydub', 'wave'],
-)
+    install_requires=[
+        'ffmpegwrapper==0.1-dev',
+        'pypi-libavwrapper',
+        ],
+    )