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mkdir ~/work
cd ~/work
wine32 ~/windows/fraktal_sft.exe
# render zoom out sequence with kalles fraktaler, saving to ~/work
for i in *.kfb ; do ~/code/maximus_kf-extras/pseudo-de < ${i} | pgmtoppm white > ${i%kfb}ppm done
# count number of kfb files, (ls *.kfb | tail -n 1) gives a hint, I had 311
ls *.kfb | ~/code/maximus_kf-extras/expmap 311 > expmap.pgm
ghc -e "100 / sqrt ( 565 * 19820 / (120 * 8000) )"
# or your favourite calculator program if you don't have ghc
# prints 29.27922435677391
# where 565 * 19820 is the size of the expmap
# 8000 is desired sample rate
# 120 is desired movie length in seconds
gimp expmap.pgm
# downscale by 29.27922435677391% (output from ghci)
# flip vertically
# make sure it's greyscale with no alpha
# save as expmap-downscaled.png
# gimp saves comments in its netpbm writers, my bad code doesn't handle it
pngtopnm < expmap-downscaled.png > expmap-downscaled.pgm
audacity
# import raw expmap-downscaled.pgm as raw unsigned 8bit PCM mono 8000Hz
# set project sample rate to 48000Hz
# select the track, mix and render
# select the track, apply filter DC Offset Removal (maybe needs a plugin)
# select the track, select amplify and apply to normalize the volume
# duplicate the track twice
# for each of the duplicates in turn, select it and apply a reverb (GVerb plugin)
# use slightly different reverb settings for each track (for stereo effect)
# normalize the duplicates by select track, select amplify, apply
# make one duplicate a left channel and the other a right channel
# set the levels of each track to -3dB
# select all tracks, mix and render
# normalize volume if needed
# select track, export as stereo wav 16bit PCM to expmap.wav
# note down the length (my test gave 1m56s)
ghc -e "1 * 60 + 56"
# to get the audio length in seconds (116)
# check the size of the kfb files (here I used 640 by 360)
# remember we have 311 kfb files
ls 00*.ppm | tac | xargs cat | ~/code/maximus_book/code/zoom 640 360 311 116 |
  avconv -f yuv4mpegpipe -i - -i expmap.wav -acodec vorbis -ab 192k -vb 2M out.ogv
# finally!
mplayer out.ogv

gcc -std=c99 -Wall -Wextra -pedantic -O3 -fopenmp -ggdb -o zoom zoom.c -lGLU -lGL -lGLEW -lglut -lm