Adding preparation script for AV analysis VMs.

The AV Analysis setup depends on 'recording servers' which are VMs
meant to ingest, encode & upload incoming video from DUTs. These
servers need to setup in a very specific way. This script prepares
the video dependencies and tools needed for recording.

Change-Id: I86c2e998f55ebcfcb016719861c5ed54a8008914
Reviewed-on: https://chromium-review.googlesource.com/1583012
Commit-Ready: Vinayak Suley <vsuley@chromium.org>
Tested-by: Vinayak Suley <vsuley@chromium.org>
Tested-by: Clifford Cheng <cliffordcheng@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Vinayak Suley <vsuley@chromium.org>
Reviewed-by: Clifford Cheng <cliffordcheng@chromium.org>
diff --git a/provingground/av_analysis/vm_prep.sh b/provingground/av_analysis/vm_prep.sh
new file mode 100644
index 0000000..3a682b5
--- /dev/null
+++ b/provingground/av_analysis/vm_prep.sh
@@ -0,0 +1,55 @@
+# BASE PREP:
+sudo apt-get update
+sudo apt-get dist-upgrade
+
+# DEPENDENCIES:
+sudo apt-get update -qq && sudo apt-get -y install \
+  alsa-utils \
+  autoconf \
+  automake \
+  build-essential \
+  cmake \
+  dtrx \
+  git-core \
+  libasound2-dev \
+  libasound2-plugins:i386 \
+  libass-dev \
+  libfdk-aac-dev \
+  libfreetype6-dev \
+  libtool \
+  libvorbis-dev \
+  libx264-dev \
+  nasm \
+  pkg-config \
+  texinfo \
+  v4l-utils \
+  wget \
+  yasm \
+  zlib1g-dev
+
+mkdir -p ~/ffmpeg_sources ~/bin
+
+
+# Build and install FFMPEG
+cd ~/ffmpeg_sources && \
+wget -O ffmpeg-snapshot.tar.bz2 https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && \
+tar xjvf ffmpeg-snapshot.tar.bz2 && \
+cd ffmpeg && \
+PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
+  --prefix="$HOME/ffmpeg_build" \
+  --pkg-config-flags="--static" \
+  --extra-cflags="-I$HOME/ffmpeg_build/include" \
+  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
+  --extra-libs="-lpthread -lm" \
+  --bindir="$HOME/bin" \
+  --enable-gpl \
+  --enable-libass \
+  --enable-libfdk-aac \
+  --enable-libfreetype \
+  --enable-libx264 \
+  --enable-nonfree && \
+PATH="$HOME/bin:$PATH" make -j4 && \
+make install && \
+hash -r
+
+cd ~