chore(travis): download ffmpeg static file (#636)

.travis.yml

@@ -67,3 +67,4 @@ cache:
   bundler: true
   directories:
   - /home/travis/.rvm/
+  - /home/travis/ffmpeg-static/

bin/setup-mastodon-in-travis.sh

@@ -18,10 +18,18 @@ sudo mv redis.conf /etc/redis
 sudo service redis-server start
 echo PING | nc localhost 6379 # check redis running
 
-# install ffmpeg from PPA because it's not in Trusty
-sudo -E add-apt-repository -y ppa:mc3man/trusty-media
-sudo -E apt-get update
-sudo -E apt-get install -yq --no-install-suggests --no-install-recommends ffmpeg
+# install ffmpeg because it's not in Trusty
+if [ ! -f /home/travis/ffmpeg-static/ffmpeg ]; then
+  rm -fr /home/travis/ffmpeg-static
+  mkdir -p /home/travis/ffmpeg-static
+  curl -sL \
+    -A 'https://github.com/nolanlawson/pinafore' \
+    -o ffmpeg.tar.xz \
+    'https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz'
+  tar -x -C /home/travis/ffmpeg-static --strip-components 1 -f ffmpeg.tar.xz --wildcards '*/ffmpeg' --wildcards '*/ffprobe'
+fi
+sudo ln -s /home/travis/ffmpeg-static/ffmpeg /usr/local/bin/ffmpeg
+sudo ln -s /home/travis/ffmpeg-static/ffprobe /usr/local/bin/ffprobe
 
 # check versions
 ruby --version