pingo is an experimental, fast Web PNG/JPG optimizer with visually lossless or lossy compression. it performs image reductions over iterations with a recursive multi-processing system
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
how to use
for Web usage, pingo could try to pick near-optimal settings if you do not provide any options
you should consider something else than maximum compression — lossy -x0 could be a faster alternative
the -s0 profile should have the best efficiency (time/size) most of the time
main profiles
options
range
effect
(no option)
—
auto-optimize for Web (adaptive)
-s0 ... -s8
0 — 8
visually lossless optimization level
-x0 ... -x3
0 — 3
auto-lossy levels
other options
options
range
effect
-verbose=N
0 — 3
verbose level quiet/results/purcentage/savings
-convertjpg=N
0 — 4
set JPG quality for PNG => JPG | 0 = disable PNG to JPG in auto
PNG options
options
range
effect
-palette
—
convert PNG to paletted mode
-palette=N
1 — 100
convert PNG to paletted mode (set quality)
-lossyfilter
—
use lossy filter
-lossyfilter=N
0 — 3
use lossy filter (set quality)
-recompress=N
0 — 8
disable trials, recompress only | 0 = remove non-critical chunks
