split PDF to images for upload to Miro

gistfile1.txt

#!/bin/bash
# same without cropping or merging 

PDF="$1"
rm -rf A B C
mkdir A B C 2>/dev/null
pdftk $PDF burst output A/%04d.pdf
find A/*.pdf | xargs -P5 -I{} bash -c '
    a={}; 
    b=$(echo $a | sed -e "s/pdf/png/g" | sed -e "s/^A/B/g");
    c=$(echo $b | sed -e "s/^B/C/")
    convert -density 200 -flatten -trim -quality 95 $a $b;
'

script.sh

#!/bin/bash
PDF="$1"
rm -rf A B C
mkdir A B C 2>/dev/null
pdftk $PDF burst output A/%04d.pdf
find A/*.pdf | xargs -P5 -I{} bash -c '
    a={}; 
    b=$(echo $a | sed -e "s/pdf/png/g" | sed -e "s/^A/B/g");
    c=$(echo $b | sed -e "s/^B/C/")
    convert -density 200 -flatten -trim -quality 95 $a $b;
    convert $b -crop 1042x1723+288+195 $c
'

# assemble into a big image with vertical stacked pages (top to bottom)
convert -density 200 -append `find C/ -name "*.png" | sort` big.png

usage.md

1. In Miro click the + sign
2. Click Upload
3. Click My Device
4. Select the book pages from the B/ directory, all png images
5. Wait for them to load
6. Ctrl+A to select them all
7. Align Left
8. Click the square-like four-dot in the upper-right to get the 1-column layout.