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fq/doc/demo.sh

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#!/bin/bash
FQ="$1"
c() {
echo -e "\x1b[97m# $1\x1b[0m"
}
s() {
echo "\$ $1"
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sh -c "${1/fq/$FQ -o unicode=true -C}"
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}
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c "Overview of mp3 file"
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s "fq . file.mp3"
echo
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c "Show ID3v2 tag inside mp3 file"
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s "fq '.headers[0]' file.mp3"
echo
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c "Resolution of embedded PNG cover art"
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s "fq '.headers[0].frames[] | select(.id == \"APIC\").picture.chunks[] | select(.type == \"IHDR\") | {width, height}' file.mp3"
echo
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c "Extract PNG file"
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s "fq '.headers[].frames[] | select(.id == \"APIC\")?.picture | tobits' file.mp3 >file.png"
s "file file.png"
rm -f file.png