57 lines
1.4 KiB
Bash
Executable File
57 lines
1.4 KiB
Bash
Executable File
#!/usr/bin/env zsh
|
|
# Convert animated PNG to animated WebP. Maximum lossless compression no blend.
|
|
|
|
setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
|
|
|
|
zmodload zsh/zutil
|
|
local -a o_help=()
|
|
local -a o_delay=()
|
|
zparseopts -D -K -- h=o_help -help=o_help -delay:=o_delay
|
|
if [[ ${#o_help} -ne 0 || ! -v 2 ]]; then
|
|
local ret=$(( ${#o_help} ^ 1 ))
|
|
print -u $(( 1 + ${ret} )) \
|
|
"usage: ${0} [-h|--help] [--delay MILLISECONDS]" \
|
|
"<INPUT FILE> <OUTPUT FILE>"
|
|
return ${ret}
|
|
fi
|
|
local input=$(realpath ${1})
|
|
local output=$(realpath ${2})
|
|
|
|
autoload die
|
|
for cmd in apngdis cwebp webpmux; do
|
|
type ${cmd} >& - || die "ERROR: ${cmd} not found"
|
|
done
|
|
|
|
local tmpdir=$(mktemp --directory --suffix='.apng2webp')
|
|
pushd ${tmpdir}
|
|
|
|
mkdir -p apngdis
|
|
pushd apngdis
|
|
cp ${input} input.png
|
|
apngdis input.png
|
|
popd
|
|
|
|
counter=1
|
|
for file in apngdis/apngframe*.png; do
|
|
cwebp -lossless -q 100 ${file} -o $(printf "%03d.webp" ${counter})
|
|
counter=$(( counter+1 ))
|
|
done
|
|
|
|
local -a webpmux_options=()
|
|
local -i counter=1
|
|
for file in apngdis/apngframe*.txt; do
|
|
local delay=$(grep -Po '=\d+/\d+' ${file})
|
|
delay=${delay:1}
|
|
delay=$(( ( ${delay%/*} * 1000 ) / ${delay#*/} ))
|
|
[[ ${#o_delay} -eq 2 ]] && delay=${o_delay[2]}
|
|
|
|
webpmux_options+=(-frame $(printf "%03d.webp" ${counter}) +${delay}+0+0+0-b)
|
|
counter+=1
|
|
done
|
|
|
|
# shellcheck disable=2086
|
|
webpmux ${webpmux_options} -o ${output}
|
|
|
|
popd
|
|
rm -r ${tmpdir}
|