only use ffmpeg

oxtimelines/ffmpeg.py

@@ -13,14 +13,7 @@ import numpy as np
 import ox
 
 
-FFMPEG = None
-for cmd in ('ffmpeg', 'avconv'):
-    cmd = ox.file.cmd(cmd)
-    if subprocess.call(['which', cmd], stdout=subprocess.PIPE) == 0:
-        FFMPEG = cmd
-        break
-if not FFMPEG:
-    print("could not find ffmpeg, make sure its installed and available in PATH")
+FFMPEG = 'ffmpeg'
 FPS = 25
 
 class Video(object):