Install latest ffmpeg on ubuntu 12.04 or 14.04

install_ffmpeg_ubuntu.sh

#!/bin/bash

# Bash script to install latest version of ffmpeg and its dependencies on Ubuntu 12.04 or 14.04
# Inspired from https://gist.github.com/faleev/3435377

# Remove any existing packages:
sudo apt-get -y remove ffmpeg x264 libav-tools libvpx-dev libx264-dev

# Get the dependencies (Ubuntu Server or headless users):
sudo apt-get update
sudo apt-get -y install build-essential checkinstall git libfaac-dev libgpac-dev \
  libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev librtmp-dev libtheora-dev \
    libvorbis-dev pkg-config texi2html yasm zlib1g-dev

# Update nasm
cd
curl -O http://www.nasm.us/pub/nasm/releasebuilds/2.13.01/nasm-2.13.01.tar.gz
tar -xvzf nasm-2.13.01.tar.gz
cd nasm-2.13.01
./configure
make
make install
sudo checkinstall --pkgname=nasm --pkgversion="2.13.01" --backup=no \
  --deldoc=yes --fstrans=no --default

# Install x264
sudo apt-get -y install libx264-dev
cd
git clone --depth 1 git://git.videolan.org/x264
cd x264
./configure --enable-static
make
sudo checkinstall --pkgname=x264 --pkgversion="3:$(./version.sh | \
  awk -F'[" ]' '/POINT/{print $4"+git"$5}')" --backup=no --deldoc=yes \
    --fstrans=no --default

# Install AAC audio decoder
cd
wget http://downloads.sourceforge.net/opencore-amr/fdk-aac-0.1.0.tar.gz
tar xzvf fdk-aac-0.1.0.tar.gz
cd fdk-aac-0.1.0
./configure
make
sudo checkinstall --pkgname=fdk-aac --pkgversion="0.1.0" --backup=no \
  --deldoc=yes --fstrans=no --default

# Install VP8 video encoder and decoder.
cd
git clone --depth 1 https://chromium.googlesource.com/webm/libvpx 
cd libvpx
./configure
make
sudo checkinstall --pkgname=libvpx --pkgversion="1:$(date +%Y%m%d%H%M)-git" --backup=no \
  --deldoc=yes --fstrans=no --default


# Add lavf support to x264
# This allows x264 to accept just about any input that FFmpeg can handle and is useful if you want to use x264 directly. See a more detailed explanation of what this means.
cd ~/x264
make distclean
./configure --enable-static
make
sudo checkinstall --pkgname=x264 --pkgversion="3:$(./version.sh | \
  awk -F'[" ]' '/POINT/{print $4"+git"$5}')" --backup=no --deldoc=yes \
  --fstrans=no --default

# Installing FFmpeg
cd
git clone --depth 1 git://source.ffmpeg.org/ffmpeg
cd ffmpeg
./configure --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb \
  --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis \
    --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 
make
sudo checkinstall --pkgname=ffmpeg --pkgversion="5:$(date +%Y%m%d%H%M)-git" --backup=no \
  --deldoc=yes --fstrans=no --default

Thank you so much!