Install ffmpeg before tests

.travis.yml

@@ -11,17 +11,14 @@ env:
     - DJANGO_SETTINGS_MODULE="tests.app.settings"
     - TOX_ENV=
   matrix:
-    - DJANGO='18'
-      WAGTAIL='14'
-    - DJANGO='19'
-      WAGTAIL='14'
-    - DJANGO='18'
-      WAGTAIL='15'
-    - DJANGO='19'
-      WAGTAIL='15'
+    - DJANGO='18' WAGTAIL='14'
+    - DJANGO='19' WAGTAIL='14'
+    - DJANGO='18' WAGTAIL='15'
+    - DJANGO='19' WAGTAIL='15'
 
 
 install:
+  - ./tests/scripts/install-ffmpeg.sh
   - pip install --upgrade pip wheel tox
 
 cache:

tests/scripts/install-ffmpeg.sh

+sudo add-apt-repository -y ppa:mc3man/trusty-media
+sudo apt-get update
+sudo apt-get install -y ffmpeg