pingo optimizer
pingo, a fast image optimizer
pingo is an experimental, fast Web PNG/JPG optimizer which offer lossless, web lossless or lossy compression. it performs image reductions over iterations thanks to recursive multi-processing and multithreading systems
manual v0.98
important
always do backup before using pingo. try on test files/folders especially made for this. understand that this tool is processing all files in subfolders. it could convert/reduce the visual quality of your files and overwrite them without any backup or warning
see some examples for pingo usage
| options | range | type | effect |
|---|---|---|---|
| -auto | -auto=N | — | auto | [1-100] optimize the image for Web (default) | -s0 to -s9 | 0 — 9 | web lossless | web lossless optimization | compression level |
| PNG | |||
| -pngquality=N | 1 — 100 | lossy | auto-select lossy type |
| -pngfilter=N | 1 — 100 | lossy (type) | use lossy filter to transform data |
| -pngpalette=N | 1 — 100 | lossy (type) | quantize to paletted (256 colors max) |
| -pngcolor=N | 1 — 100 | lossy (type) | reduce the number of colors |
| -pngconvert=N | 0 — 12 | lossless-lossy | convert JPG to PNG using a filter |
| -pngstrip=N | 0 — 3 | lossy | remove non-critical PNG chunks (see details) |
| JPG | |||
| -jpgquality=N | 1 — 100 | lossy | set JPG quality |
| -jpgsample=N | 0 — 2 | lossy | set JPG subsampling |
| -jpgtable=N | 0 — 5 | lossy | set JPG quantization table |
| -jpgfilter=N | 0 — 10 | lossy | enhance details and adapt quality |
| -jpgconvert | — | lossy | convert PNG to JPG <=> -rgb |
| -jpgscale | — | lossy | auto-scaling for high definition JPG |
| -jpgstrip=N | 0 — 3 | lossy | remove non-critical JPG segments (see details) |
| APNG | |||
| -apng=N | 0 — 4 | lossless-lossy | define APNG optimization type (see details) |
| -apngquality=N | 1 — 100 | lossy | set APNG quality |
| PNG/JPG | -fast | — | lossy | just remove chunks or segments <=> -strip=N | -strip=N | 0 — 3 | lossy | remove PNG/JPG chunks/segments (see details) |
| -srgb=N | 0 — 3 | lossy | control the conversion to sRGB (see details) |
| transformations | effect |
|---|---|
| -srgb | force conversion to sRGB for PNG and JPG (always overwrite) |
| -grayscale | convert image data to grayscale |
| -notrans | convert RGB data to remove transparency <=> -rgb |
| -rgb: N N N | set backgroundcolor in red, green and blue (0-255) <=> -notrans or -jpgconvert |
| shortcuts | effect |
| -lossless | enable strict lossless optimization |
| -compress, -c | just do recompression |
| -nocompression, -nc | keep the data uncompressed for output |
| -soft | lossy but high quality presets (PNG and JPG) |
| -text | convert an input JPG text image to PNG |
| trials | effect |
| -uncompress, -u | just do uncompression |
| -reset | force filter none, convert RGB data if alpha is 0, uncompress |
| controls | effect |
| -nomulti, -low | disable multiblocks/multiprocessing |
| -multiprocess=N | enable or disable the multiprocessing (default enabled) |
| -multiblocks=N | set the number of threads (default: 4) |
| -verbose=N | set the verbose level (0=quiet, 1=result, 2=result and %, 3=result, % and size) |
| -q, -quiet | set verbose to 0 |
| no[value] | effect |
|---|---|
| -nopng | disable PNG processing |
| -nojpg | disable JPG processing |
| -nostrip | do not remove PNG/JPG chunks/markers |
| -nopngstrip | do not remove PNG chunks |
| -nojpgstrip | do not remove JPG markers |
| -nosrgb | avoid sRGB conversion for PNG and JPG |
| -nopngsrgb | avoid sRGB conversion for PNG |
| -nojpgsrgb | avoid sRGB conversion for JPG |
| -nojpgcheck | do not check JPG quality |
| -nodate | restore modification date |
| -noalpha | do not change RGB if alpha is 0 |
| -notrials | just do recompression |
| -nodithering | disable diffusion (palette/filter) |
| -norotation | ignore JPG orientation tag |
| -noconversion | do not convert PNG to JPG in auto |
| -nocheck | disable checking in auto |
| -noext | do not check/change extension according to file header |