#!/bin/bash
# cheapo autorotoscoper
# Copyright 2006, Kees Cook <kees@outflux.net>
# Licensed under the GPL v2+
set -e

SOURCE="$1"
if [ ! -r "$SOURCE" ]; then
    echo "Usage: $0 SOURCE.avi" >&2
    exit 1
fi

if [ ! -r "00000001.png" ]; then
    mplayer -vo png -ao null -nosound "$SOURCE"
fi

# Fill style
if [ ! -r "00000001.png.svg" ]; then
    echo "Tracing ..."
    for i in *[0-9].png; do
        autotrace -despeckle-level 15 -input-format PNG -output-file $i.svg -output-format svg $i
    done
fi

if [ ! -r "00000001.png.svg.png" ]; then
    for i in *[0-9].png.svg; do
        inkscape --export-png=$i.png $i
    done

    ffmpeg -r 30 -i %08d.png.svg.png -vcodec mpeg4 -b 600 -i "$SOURCE" -acodec copy "$SOURCE"-fill.avi
fi

# Outline style
if [ ! -r "00000001.png.outline.svg" ]; then
    echo "Copying fill SVGs to outline SVGs ..."
    find . -name '*[0-9].png' | while read i; do
        cp $i.svg $i.outline.svg
    done
    echo "Converting fill to outline ..."
    find . -name '*[0-9].png.outline.svg' | xargs perl -pi -e 's/style="fill:#([^;]+); stroke:none;"/style="fill:#$1; fill-opacity:0.3; stroke:#000000; stroke-opacity:1; stroke-width:2;"/'
fi

if [ ! -r "00000001.png.outline.svg.png" ]; then
    for i in *[0-9].png.outline.svg; do
        inkscape --export-png=$i.png $i
    done

    ffmpeg -r 30 -i %08d.png.outline.svg.png -vcodec mpeg4 -b 600 -i "$SOURCE" -acodec copy "$SOURCE"-outline.avi
fi