51 lines
1.3 KiB
Bash
Executable File
51 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env zsh
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# Convert animated PNG to animated WebP. Maximum compression no blend.
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setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
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zmodload zsh/zutil
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local -a o_help=()
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local -a o_delay=()
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zparseopts -D -K -- h=o_help -help=o_help -delay:=o_delay
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if [[ ${#o_help} -ne 0 || ! -v 2 ]]; then
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local ret=$(( ${#o_help} ^ 1 ))
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print -u $(( 1 + ${ret} )) \
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"usage: ${0} [-h|--help] [--delay MILLISECONDS]" \
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"<INPUT FILE> <OUTPUT FILE>"
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return ${ret}
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fi
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local input="$(realpath "${1}")"
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local output="$(realpath "${2}")"
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local tmpdir=$(mktemp --directory --suffix='.apng2webp')
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pushd ${tmpdir}
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mkdir -p apngdis
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pushd apngdis
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cp "${input}" "input.png"
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apngdis "input.png"
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popd
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counter=1
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for file in apngdis/apngframe*.png; do
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cwebp -lossless -q 100 "${file}" -o "$(printf "%02d" ${counter}).webp"
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counter=$(( counter+1 ))
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done
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local -a webpmux_options=()
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local counter=1
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for file in apngdis/apngframe*.txt; do
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local delay=$(grep -Po '=\d+/' "${file}")
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delay=${delay:1:-1}
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[[ ${#o_delay} -eq 2 ]] && delay=${o_delay[2]}
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webpmux_options+=(-frame $(printf "%02d" ${counter}).webp +${delay}+0+0+0-b)
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counter=$((counter+1))
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done
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# shellcheck disable=2086
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webpmux ${webpmux_options} -o "${output}"
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popd
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rm -r ${tmpdir}
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