Convert all files in directory to webp, with default params, or standard cwebp params passed from command

webp-convert-directory.sh

#!/bin/bash

PARAMS=('-m 6 -q 70 -mt -af -progress')

if [ $# -ne 0 ]; then
	PARAMS=$@;
fi

cd $(pwd)

shopt -s nullglob nocaseglob extglob

for FILE in *.@(jpg|jpeg|tif|tiff|png); do 
    cwebp $PARAMS "$FILE" -o "${FILE%.*}".webp;
done

As a guy who lazy to write script for recursive work, you helped me a lot. Thanks!

Thank you 👍

Great Job. Thanks

Thanks for sharing this. I love reading modern BASH code. Helps me realize how outdated some of my methods are :).

Thanks! 💯

Good jobs. Thank you so much!

Great job

Nice script! In my case I have a folder with many subfolders. Therefore, this variant unfortunately does not help me. ;)

thanks, nice job

find -type f \( -iname '*.jpg' -o -iname '*.png' \) -print0 | xargs -0 -I{} -r -n1 -P10 cwebp -z 9 -m 6 -mt -pass 10 -alpha_filter best -short -progress "{}" -o "{}.webp"

Optional: rename .jpg.webp and .png.webp to .webp

find -iname '*.jpg.webp' -print0 | xargs -0 -I{} rename '.jpg.webp' '.webp'
find -iname '*.png.webp' -print0 | xargs -0 -I{} rename '.png.webp' '.webp'

Nice! This made my life easier. Much appreciated!

One revision I had to make was this: (because one of my directory names had a space in it)
Line #9 cd "$(pwd)"

Thanks!

sh convert.sh
convert.sh: 3: Syntax error: "(" unexpected

❤️

🤙

find -iname '*.jpg.webp' -print0 | xargs -0 -I{} rename '.jpg.webp' '.webp'

run "bash NAMEOFfile" and it runs well!

Very nice, thank you!
Uhmmm any clues on how to even produce multiple sizes of each image? Let's say 3 sizes with max width each one?

execute this from current directory

#!/bin/bash
PARAMS=('-m 6 -q 70 -mt -af -progress')
for D in `find . -type d`
do
       # cd $D
        echo $D
        cd $D


for FILE in *.{jpg,jpeg,png,svg,tif,tiff}; do
  [ -e "$FILE" ] || continue
  # Here "$FILE" exists
  cwebp $PARAMS "$FILE" -o "${FILE%.*}".webp;

done

cd ~

done

Thank you a lot!
👍

Thanks mate ✌️

I needed a recursive version, and wanted to use gnu parallel:
find . -type f | egrep '.jpeg|.jpg|.tiff|.tif|.png' | parallel --progress 'cwebp -quiet -af {} -o {.}.webp'

requires: webp, parallel

hey folks, I wanted to generate all my sizes in one go over a directory, so I took the idea further in this cwebp_r.sh file.

My bash scripting is poor so I'm sure there are many possible suggestions!

Nice script! In my case I have a folder with many subfolders. Therefore, this variant unfortunately does not help me. ;)

Hi

I use this code block on ZSH :

#!/bin/zsh

# Define the image types to search for
image_types=("*.jpeg" "*.jpg" "*.tiff" "*.tif" "*.png")

# Iterate over each image type
for type in "${image_types[@]}"; do
  # Find files of the specified image type
  find . -type f -iname "$type" | while read -r IMAGE; do
    # Get the filename without extension
   filename_without_extension=${IMAGE%.*}
   
    # Convert the image to WebP format
    cwebp "$IMAGE" -o "${filename_without_extension}.webp"

    echo "Converted $IMAGE to ${filename_without_extension}.webp"

     # rm -rf "$IMAGE";
  done
done

echo "Conversion complete."

Please note that, you must not run this script on macOS root folder. Only run in needed folder. It finds all images at sub directiories and convert to web without removing original one. Save as "*.sh" and elevate it from terminal:

chmod +x name-of-shellfile

Thank you all for this, I added together your solutions into a recursive script.

#!/bin/bash

PARAMS=('-m 6 -q 50 -mt -af -progress')
for D in `find . -type d`
do
   # cd $D
    echo "Entered directory $D"
    cd $D

    # Define the image types to search for
    image_types=("*.jpeg" "*.jpg" "*.tiff" "*.tif" "*.png")

    # Iterate over each image type
    for type in "${image_types[@]}"; do
      # Find files of the specified image type
      find . -type f -iname "$type" | while read -r IMAGE; do
        # Get the filename without extension
       filename_without_extension=${IMAGE%.*}

        # Convert the image to WebP format
        cwebp $PARAMS "$IMAGE" -o "${filename_without_extension}.webp"

        echo "Converted $IMAGE to ${filename_without_extension}.webp"

         # rm -rf "$IMAGE";
      done
    done

done

echo "Conversion complete."

Save it to something like convert-webp.sh, put it in a directory with images and subfolders, then run

sh convert-webp.sh

and watch the magic happen.

Compare original and webp versions, then marvel at up to 80-90% size reductions :D

Nice!

Nice!

Thank you all for this, I added together your solutions into a recursive script.

#!/bin/bash

PARAMS=('-m 6 -q 50 -mt -af -progress')
for D in `find . -type d`
do
   # cd $D
    echo "Entered directory $D"
    cd $D

    # Define the image types to search for
    image_types=("*.jpeg" "*.jpg" "*.tiff" "*.tif" "*.png")

    # Iterate over each image type
    for type in "${image_types[@]}"; do
      # Find files of the specified image type
      find . -type f -iname "$type" | while read -r IMAGE; do
        # Get the filename without extension
       filename_without_extension=${IMAGE%.*}

        # Convert the image to WebP format
        cwebp $PARAMS "$IMAGE" -o "${filename_without_extension}.webp"

        echo "Converted $IMAGE to ${filename_without_extension}.webp"

         # rm -rf "$IMAGE";
      done
    done

done

echo "Conversion complete."

Save it to something like convert-webp.sh, put it in a directory with images and subfolders, then run

sh convert-webp.sh

and watch the magic happen.

Compare original and webp versions, then marvel at up to 80-90% size reductions :D

Amazing! Thank you so much!🤝

Thank you ! saved my day