diff --git a/README.md b/README.md index 3edbe01..70862b8 100644 --- a/README.md +++ b/README.md @@ -168,20 +168,34 @@ This is what it looks like in the PCManFM file manager: ### Examples -Rescale images to 1200px for all supported files found in a directory with a size larger than 60MB: +* Rescale images to 1200px for all supported files found in a directory with a size larger than 60MB: `cbconvert --recursive --width 1200 --size 60 /media/comics/Thorgal/` -Convert all images in pdf to 4bit BMP images and save the result in ~/comics directory: +* Convert all images in pdf to 4bit BMP images and save the result in ~/comics directory: -`cbconvert --bmp --outdir ~/comics /media/comics/Garfield/Garfield_01.pdf` +`cbconvert --format bmp --outdir ~/comics /media/comics/Garfield/Garfield_01.pdf` [BMP](http://en.wikipedia.org/wiki/BMP_file_format) format is a very good choice for black&white pages. Archive size can be smaller 2-3x and the file will be readable by comic readers. -Extract covers to ~/covers dir for all supported files found in the directory, Lanczos algorithm is used for resizing: +* Extract covers to ~/covers dir for all supported files found in the directory, Lanczos algorithm is used for resizing: `cbconvert cover --outdir ~/covers --filter=7 /media/comics/GrooTheWanderer/` +* Convert all images to AVIF format: + +`cbconvert --format avif --quality 50 --width 1280 --outdir ~/comics /media/comics/Misc/` + +### Quality settings + +This table maps quality settings for JPEG to the respective AVIF and WEBP quality settings: + +| | | | | | +|--------------|----|----|----|----| +| JPEG quality | 50 | 60 | 70 | 80 | +| AVIF quality | 48 | 51 | 56 | 64 | +| WEBP quality | 55 | 64 | 72 | 82 | + ### Compile Install ImageMagick7 and libheif (with libaom) libraries and headers and then install to GOBIN: