Created
April 24, 2020 11:19
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Make a video from an ppsx file
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#!/bin/bash | |
#passende Ordner erstellen | |
read -p "Nummer der Vorlesung " nummer | |
mkdir -p Einzelseiten | |
mkdir -p Einzelseiten/VL$nummer | |
mkdir -p Einzelseiten/VL$nummer/audio | |
mkdir -p Einzelseiten/VL$nummer/jpg | |
mkdir -p Einzelseiten/VL$nummer/pdf | |
mkdir -p Einzelseiten/VL$nummer/png | |
mkdir -p Einzelseiten/VL$nummer/video | |
mkdir -p decrypt | |
# check if file is decrypted | |
if msoffcrypto-tool "$1" --test; then | |
#decrypt ppsx (https://github.com/nolze/msoffcrypto-tool) | |
read -p "Password: " pass | |
msoffcrypto-tool "$1" decrypted.ppsx -p $pass | |
else | |
# just rename | |
cp "$1" decrypted.ppsx | |
fi | |
# pdf erstellen -> decrypted.pdf | |
libreoffice --headless --convert-to pdf decrypted.ppsx | |
# pdf split pages | |
pdftk decrypted.pdf burst output Einzelseiten/VL$nummer/pdf/slide%d.pdf | |
# convert to png | |
ls ./Einzelseiten/VL$nummer/pdf/*.pdf | xargs -L1 -I {} inkscape {} -z --export-dpi=300 --export-area-drawing --export-png={}.png | |
mv ./Einzelseiten/VL$nummer/pdf/*.png ./Einzelseiten/VL$nummer/png | |
# convert to jpg | |
ls ./Einzelseiten/VL$nummer/png/*.png | xargs -L1 -I {} convert {} -quality 100 -density 300 {}.jpg | |
mv ./Einzelseiten/VL$nummer/png/*.jpg ./Einzelseiten/VL$nummer/jpg | |
# copy audio files to /audio | |
cp decrypted.ppsx decrypted.zip | |
unzip decrypted.zip -d decrypt | |
mv ./decrypt/ppt/media/media*.m4a ./Einzelseiten/VL$nummer/audio | |
# rename audio files matching slides | |
cd decrypt/ppt/slides/_rels | |
for f in $(ls); do | |
if grep -q "m4a" "$f"; then | |
slideNummer=$(echo "$f" | cut -d"." -f1 | cut -c 6-) | |
mediaFile=$(grep -o -E "media[[:digit:]]*.m4a" "$f" | head -n 1 | cut -d "." -f1 | cut -c 6-) | |
echo "Found Media (Audio-File $mediaFile) in $f (Slide $slideNummer)" | |
mv ../../../../Einzelseiten/VL$nummer/audio/media$mediaFile.m4a ../../../../Einzelseiten/VL$nummer/audio/audio$slideNummer.m4a | |
fi | |
done | |
cd ../../../.. | |
# Einzelfolien mit Audio kreieren | |
cd Einzelseiten/VL$nummer/audio/ | |
for f in $(ls); do | |
slideNummer=$(echo "$f" | cut -d"." -f1 | cut -c 6-) | |
ffmpeg -i ../jpg/slide$slideNummer.pdf.png.jpg -i audio$slideNummer.m4a -c:v mjpeg -c:a copy -pix_fmt yuv420p ../video/$slideNummer.mp4 | |
#echo "file './Einzelseiten/VL$nummer/video/$slideNummer.mp4'" >> ../../../list.txt | |
done | |
cd ../../.. | |
# Liste erstellen | |
cd Einzelseiten/VL$nummer/video/ | |
for f in $(ls); do | |
slideNummer=$(echo "$f" | cut -d"." -f1) | |
echo "$slideNummer" >> numbers.txt | |
done | |
sort -n numbers.txt >> numbers_sorted.txt | |
while read line; do | |
echo "file './Einzelseiten/VL$nummer/video/$line.mp4'" >> ../../../list.txt | |
done < numbers_sorted.txt | |
cd ../../.. | |
# Merge Einzelvideos | |
ffmpeg -f concat -safe 0 -i list.txt -c copy VL$nummer.mp4 | |
# cleanup | |
rm -rf decrypt | |
rm decrypted.pdf | |
rm decrypted.ppsx | |
rm decrypted.zip | |
rm list.txt |
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MP4 isn't super slow to generate as I'm using
-c copy
to copy the whole stream and not reencoding it.