Generate a graph video of a svn project. Requires gource and ffmpeg

generateGraphVideo.sh

# alias for creating a graph video of a git project
g() {
  DEFAULT_USER_IMAGE=~/Pictures/avatars/default.png
	USER_IMAGE_DIR=~/Pictures/avatars
	BRANCH=master

	# determine first commit for this branch
	FIRST_COMMIT=`git log $BRANCH --reverse --format=%H|head -n 1`
	# get the third last commit to have a pretty accurate timestamp
	LAST_COMMIT=`git log $BRANCH --format=%H|head -n 3|tail -n 1`

	# determine lifetime of this branch
	FIRST_STAMP=`git show --format=%at $FIRST_COMMIT|head -n 1`
	LAST_STAMP=`git show --format=%at $LAST_COMMIT|head -n 1`

	# calculate the number of seconds this branch has lived
	SECONDS=$((LAST_STAMP-FIRST_STAMP))

	# determine how much seconds should be shown per day
	SECONDS_PER_DAY=`echo "scale=2; 12600000/$SECONDS"| bc`

	# set miscelaneous options
	MISC_OPTIONS="--seconds-per-day $SECONDS_PER_DAY --file-idle-time 0 --git-branch $BRANCH --highlight-user 4np"

	if [ ${#@} -lt 1 ]; then
		echo 'usage:'
		echo 'g videotitle [optional:720p|1080p] [optional:logo image]'
		echo 'g "this is my video" /tmp/logo.png'
	elif [[ -d ./.git ]]; then
		echo "generating commit animation..."

		# determine resolution
		if [ ${#@} -gt 1 ]
		then
			if [ $2 == "720p" ]
			then
				SIZE="-960x720 --font-size 10"
				SIZE_FFMPEG="-s 960x720"
			else
				SIZE="-1920x1080 --font-size 20"
				SIZE_FFMPEG="-s 1920x1080"
			fi
		else
			SIZE="-1920x1080 --font-size 20"
			SIZE_FFMPEG="-s 1920x1080"
		fi

		# add a logo?
		if [ ${#@} -gt 2 ]
		then
			LOGO="--logo $3"
		else
			LOGO=
		fi

		# add a title
		TITLE="--title \""$1"\""

		#ffmpeg -y -r 60 -f image2pipe -vcodec ppm -i gource.ppm -vcodec libx264 -preset ultrafast -crf 1 -threads 0 -bf 0 gource.mp4

		# generate commit animation
		gource	--hide filenames,progress,mouse --background 181818 --default-user-image $DEFAULT_USER_IMAGE --user-image-dir $USER_IMAGE_DIR \
			--camera-mode track --stop-at-end -s 0.2 -i 63072000 --hide filenames,bloom,progress,mouse $TITLE $LOGO $SIZE $MISC_OPTIONS \
			--multi-sampling -r 25 \
			-o - | ffmpeg -y -b 3000K -r 25 -f image2pipe -vcodec ppm -i - -vcodec libx264 -vpre slow SIZE_FFMPEG -threads 0 video.mp4

		# get the duration of the generated video
		FF=$(ffmpeg -i video.mp4 2>&1)
		D="${FF#*Duration: }"
		DURATION=`echo "${D%%,*}"`

		echo "looking for a song with duration $DURATION to mux audio in..."
		
		# mux audio with video
		# ffmpeg -y -b 2048k -r 25 -f image2pipe -vcodec ppm -s 1920x1080 -threads 0 -i ~/Music/iTunes/iTunes\ Music/Music/Band\ Of\ Horses/Everything\ All\ The\ Time/04\ The\ Funeral.mp3 -i graph.mp4 graph-with-audio.mp4
		#MUSIC=~/Music/iTunes/iTunes\ Media/Music/Band\ Of\ Horses/Everything\ All\ The\ Time/04\ The\ Funeral.mp3
		#ffmpeg -i video.mp4 -vcodec copy -i $MUSIC -acodec copy video-with-audio.mov
	else
		echo `pwd`' is no git repository...'
	fi
}