#Für alle, die Speicher sparen wollen:
for file in *.png; do
    cwebp -lossless "$file" -o "${file%.png}.webp" -metadata all -q 100 && touch -r "$file" "${file%.png}.webp" && [ -e "${file%.png}.webp" ] && [ "$(stat -c%s "${file%.png}.webp")" -gt 0 ] && rm "$file"
done

#Nur wenn kleiner lossless:
for file in *.png; do
    cwebp -lossless "$file" -o "${file%.png}.webp" -metadata all -q 100 -z 9 && touch -r "$file" "${file%.png}.webp"

    if [ -e "${file%.png}.webp" ] && [ "$(stat -c%s "${file%.png}.webp")" -gt 0 ] && [ "$(stat -c%s "$file")" -gt "$(stat -c%s "${file%.png}.webp")" ]; then
        rm "$file"
    else
        rm "${file%.png}.webp"
    fi
done

#Für JPEG 100% Qualität:
for file in *.jpg; do
    cwebp "$file" -o "${file%.jpg}.webp" -metadata all -q 100 -z 9 && touch -r "$file" "${file%.jpg}.webp"

    if [ -e "${file%.jpg}.webp" ] && [ "$(stat -c%s "${file%.jpg}.webp")" -gt 0 ] && [ "$(stat -c%s "$file")" -gt "$(stat -c%s "${file%.jpg}.webp")" ]; then
        rm "$file"
    else
        rm "${file%.jpg}.webp"
    fi
done

#Für JPEG als AVIF mit QL 18:
for file in *.jpg; do
    avifenc "$file" -o "${file%.jpg}.avif" --min 0 --max 18 -s 1 -j 8 && touch -r "$file" "${file%.jpg}.avif"

    if [ -e "${file%.jpg}.avif" ] && [ "$(stat -c%s "${file%.jpg}.avif")" -gt 0 ] && [ "$(stat -c%s "$file")" -gt "$(stat -c%s "${file%.jpg}.avif")" ]; then
        rm "$file"
    else
        rm "${file%.jpg}.avif"
    fi
done

#Für fast verlustfreies AVIF:
for file in *.jpg; do
    avifenc "$file" -o "${file%.jpg}.avif" --min 0 --max 0 -s 1 && touch -r "$file" "${file%.jpg}.avif"

    if [ -e "${file%.jpg}.avif" ] && [ "$(stat -c%s "${file%.jpg}.avif")" -gt 0 ] && [ "$(stat -c%s "$file")" -gt "$(stat -c%s "${file%.jpg}.avif")" ]; then
        rm "$file"
    else
        rm "${file%.jpg}.avif"
    fi
done