qmp3info(1)

💖 qmp3info — bestie edition 💖

okay so this is qmp3info(1), one of the quelcom man pages, and it's literally the "tell me about my mp3" girlie. she reads files, she spills the tea, she does math. let's go 🎀

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✨ SYNOPSIS ✨

qmp3info [option]... file...

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🌸 DESCRIPTION 🌸

so basically qmp3info takes a whole list of mp3 files and prints some of their parameters straight to standard output: version, layer, sample rate, bit rate, duration, and the tag. and then, because she's a considerate queen, a duration summary gets appended at the end of the list. 🫶

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💅 OPTIONS 💅

• -c, --check — check the entire stream (slower but accurate). every single frame of the stream gets read and the total duration is computed exactly. this option auto-activates if the stream appears to be vbr (aka it has frames with different bit rates). no cap. 🔥
• -h, --help — show a brief help and dip. ✌️
• -s, --summary-only — show only the summary. do not show info from every file. main character summary energy only. 👑
• -v, --verbose — show also the number of bytes and frames. she's giving details. ✨
• -V, --version — show version and exit. 💁♀️

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💀 BUGS 💀

okay bestie, listen, this is the part where we keep it real:

variable bit rate (vbr) streams are detected by reading the initial (5) frames in the stream. if their bit rate field differs, the --check option is activated automatically.

if vbr is not detected, qmp3info reads only the first frame in the stream and calculates the duration supposing that:

1. the entire stream is composed by valid frames, and
2. all the frames have the same bit rate.

this is a fast way to compute the duration of the stream, but it is not exact: there's an error of 0.3% aprox. if you want to be accurate, or qmp3info is unable to detect a vbr stream, use --check. fr fr, don't be mad at her, she was going fast. 😭

tests have been done only with mpeg version 1 layer iii streams, though it may (or not) work with other versions or layers. so like… she's not claiming to be universal, she's just telling you what she's been tested on. 🙈

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🌈 AUTHOR 🌈

dmanye@etse.urv.es

http://www.etse.urv.es/~dmanye/quelcom/quelcom.html

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🦋 SEE ALSO 🦋

qmp3join(1), qmp3cut(1), qmp3check(1), qmp3report(1)

qwavinfo(1), qwavjoin(1), qwavcut(1), qwavsilence(1), qwavfade(1), qwavheaderdump(1)

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and that's the whole vibe, bestie 💜 this page is from quelcom 0.4.0, dated february 2001, and it's for qmp3info(1). slay, go read your mp3s. 🌸✨💖