Conversão de fotos no Linux

Lendo texto de gif

sudo apt install -y gocr
giftopnm ~/Pictures/39.gif | gocr -

Lendo texto de jpeg

djpeg -pnm -gray text.jpg | gocr -

Converter webp para PNG

for i in *.webp; do ffmpeg -i  $i "${i%.webp}.png" ; done

Converter webp para JPG

for i in *.webp; do ffmpeg -i  $i "${i%.webp}.jpg" ; done

Redimensionar imagens

sudo apt-get install imagemagick

convert example.png -resize 200 example.png
convert example.png -resize 200x100 example.png
convert example.png -resize 200x100! example.png

Redimensionar imagens em batch

$ for file in *.jpg; do convert $file -resize 720 "${file%.jpg}-resized.jpg"; done

Rotacionar imagens

for file in *.png; do convert $file -rotate 90 rotated-$file; done
for file in *.png; do convert $file -resize 200 converted/$file; done

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