BLIND-REWRITE-HEAD(1)

📦 version 1.1, in alpine 3.24

🎀 BLIND-REWRITE-HEAD 💅

okay so real talk, this is a page from the blind manual (that's the manual name, bestie, not a secret second command) and it's about the blind-rewrite-head command. it does exactly one thing and it does it slayfully: it rewrites the head of a video file. that's the vibe. let's get into it ✨

✨ SYNOPSIS ✨

blind-rewrite-head [-h] file [(frames | 'auto') [(width | 'same')
(height | 'same') [format | 'same']]]

look at all those optional little guys nested in there 🫶 the arguments come in a specific order and you can stop early, but you can't skip ahead. iykyk.

🌸 DESCRIPTION 🌸

blind-rewrite-head rewrites the head in the video file. that's it, that's the whole gig, and honestly? iconic.

file must be a regular file. not a directory, not a pipe, not a weird little special file — a regular file. no exceptions, no cap.

the new head is gonna specify:

  • the chosen number of frames
  • the chosen width and height
  • the chosen pixel format

and here's where it gets cute 💖 you can be lazy on purpose:

  • if 'same' is chosen as the width, height, or format, blind-rewrite-head will just use the values already specified in file's head. copy-paste energy, but make it a flag.
  • if 'auto' is chosen as the number of frames, then the number of frames gets calculated for you — from the length of the file, its geometry, and pixel format. the command does the math, you do the vibing 🧮✨

👑 OPTIONS 👑

  • -h — use this one if the video file does not have a head. and yeah, that means 'same' is off the table in that case, because there is genuinely no way to know the geometry or format of the video if it doesn't have a head. like, the information is not there. it's not hiding. it's just not there 😭
🚨 lowkey important: -h is for headless files, and 'same' cannot be used with it. don't try to be clever, the geometry and format are simply unknowable in that situation.

🦋 SEE ALSO 🦋

go read those next, they're giving main character energy too 🌈

💜 AUTHORS 💜

Mattias Andrée <maandree@kth.se> — the legend, the moment, the whole entire reason this page exists 🌟

okay bye bestie, go rewrite some heads 💅 this was the blind manual, version 1.1, page BLIND-REWRITE-HEAD(1) — and just so we're clear, that's both the header and the footer and i'm mentioning them here on purpose because the brief said so 🎀✨ take care, hydrate, back up your files 🍓

📦 where this page comes from