Web Design Leaves

cwebp sample_01.jpg -o sample_01.webp    return #変換を実行
Saving file 'sample_01.webp'
File:      sample_01.jpg
Dimension: 1200 x 800
Output:    143700 bytes Y-U-V-All-PSNR 37.11 43.58 44.78   38.46 dB
           (1.20 bpp)
block count:  intra4:       2781  (74.16%)
              intra16:       969  (25.84%)
              skipped:        62  (1.65%)
bytes used:  header:            280  (0.2%)
             mode-partition:  14657  (10.2%)
 Residuals bytes  |segment 1|segment 2|segment 3|segment 4|  total
    macroblocks:  |      29%|       8%|      15%|      48%|    3750
      quantizer:  |      36 |      30 |      24 |      17 |
   filter level:  |      11 |       6 |       4 |      20 |
   
ls -lh   return #830K が 140K に圧縮されている
-rw-r--r--@  1 xxxxx  staff   830K  2  6 06:43 sample_01.jpg
-rw-r--r--@  1 xxxxx  staff   140K  2  6 09:08 sample_01.webp 

cwebp -q 70 sample_01.jpg -o sample_01_70.webp
Saving file 'sample_01.webp'
File:      sample_01.jpg
Dimension: 1200 x 800
Output:    133652 bytes Y-U-V-All-PSNR 36.46 43.38 44.60   37.85 dB
           (1.11 bpp)
block count:  intra4:       2646  (70.56%)
              intra16:      1104  (29.44%)
              skipped:        75  (2.00%)
bytes used:  header:            259  (0.2%)
             mode-partition:  14073  (10.5%)
 Residuals bytes  |segment 1|segment 2|segment 3|segment 4|  total
    macroblocks:  |      29%|       8%|      15%|      48%|    3750
      quantizer:  |      39 |      33 |      26 |      19 |
   filter level:  |      11 |       7 |      23 |      21 |

for file in *.jpg; do cwebp $file -o ${file}.webp; done   return #変換を実行
Saving file '001.jpg.webp'   # 元のファイル名（拡張子付き）に .webp が付きます
File:      001.jpg
Dimension: 3776 x 2520
Output:    740818 bytes Y-U-V-All-PSNR 39.63 42.61 44.02   40.54 dB
           (0.62 bpp)
block count:  intra4:      28880  (77.45%)
              intra16:      8408  (22.55%)
              skipped:       296  (0.79%)
bytes used:  header:            376  (0.1%)
・・・以下省略・・・

for file in *.png; do cwebp $file -o ${file%.*}.webp; done
Saving file 'sample_01.webp'   # 元の拡張子は取り除き .webp にする
File:      sample_01.png
Dimension: 1019 x 651
・・・以下省略・・・

for F in *.jpg; do cwebp $F -o `basename ${F%.jpg}`.webp; done

#!/bin/bash
extension='.jpg'
if [ $1 != '' ]; then
  extension=."$1"
fi
for file in *"$extension"
do
  cwebp $file -o ${file}.webp
done

chmod u+x webp_for    return #実行権限を自分だけに設定
      
./webp_for png    return #引数に png を指定して実行
Saving file 'sample_01.png.webp'   # 元のファイル名（拡張子付き）に .webp が付きます
File:      sample_01.png
Dimension: 1019 x 651
Output:    38758 bytes Y-U-V-All-PSNR 42.72 42.45 43.18   42.75 dB
           (0.47 bpp)
・・・以下省略・・・

find ./ -maxdepth 1 -type f -name '*.jpg' -exec cwebp {} -o {}.webp \;  return
Saving file './/002.jpg.webp'
File:      .//002.jpg
Dimension: 3776 x 2520
Output:    378382 bytes Y-U-V-All-PSNR 41.40 46.20 47.93   42.60 dB
           (0.32 bpp)
・・・以下省略・・・

#!/bin/bash
depth='-maxdepth '
if [ "$1" = 0 ]; then
  depth=''
elif [ "$1" = '' ]; then
  depth='-maxdepth 1'
else 
  depth='-maxdepth '$1
fi
path=`pwd`
files=`find $path ${depth} -type f -name '*.jpg' -o -name '*.png'`;
for file in $files
do 
  cwebp $file -o ${file}.webp
done