BLIND-ARITHM(1)

💅 blind-arithm(1) — the arithmetic-on-videos girlie ✨

okay so this is a page from the General Commands Manual, and it's about blind-arithm, a whole vibe for doing math on videos 🎀

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✨ NAME ✨

blind-arithm — perform simple arithmetic on a video 🧮🎬

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🌸 SYNOPSIS 🌸

blind-arithm [-axyz] operation right-hand-stream

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🦋 DESCRIPTION 🦋

So here's the whole deal, bestie: blind-arithm reads the left-hand operands from stdin, and it reads the right-hand operands from right-hand-stream, then it does the operation you picked to those read values and prints the resulting video to stdout. 💖

The operation happens with operands from the same colour parameters, on the same pixels, on the same frames, on the two videos. like, matching up perfectly, one-to-one, no cap 👑

And the length thing — listen up, this is important 📢

• If stdin is longer than right-hand-stream, the remainder of stdin gets printed without any changes ✨
• If stdin is shorter than right-hand-stream, the remainder of right-hand-stream is ignored but may be partially read 👀

not me warning you about that "may be partially read" — it's literally right there in the manual, so don't be surprised 🫶

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🔥 OPERATIONS 🔥

Pick your fighter, she's gotta be one of these:

• add — calculate the sum of the operands ➕
• sub — subtract the right-hand operand from the left-hand operand ➖
• mul — calculate the product of the operands ✖️
• div — divide the left-hand operand by the right-hand operand ➗
• exp — raise the left-hand operand to the nth operand, where n is the value of the right-hand operand ⚡
• log — calculate the logarithm of the left-hand operand and divide it by the logarithm of the right-hand operand 🌲
• min — select the lowest operand 🔽
• max — select the highest operand 🔼
• abs — calculate the sum of absolute value of the left-hand operand subtracted by the right-hand operand, and the right-hand operand 💀

i know. i know. that last one is worded exactly like that and i'm not about to "fix" it for you — it's giving iconically confusing but we respect the source fr fr 🙈

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💅 OPTIONS 💅

• -a — do not modify the alpha channel (the fourth channel) 🎀
• -x — do not modify the X channel (the first channel) 💜
• -y — do not modify the Y channel (the second channel) 🌈
• -z — do not modify the Z channel (the third channel) ⭐

like, each flag is literally "leave this channel alone, she's fine" — pick whichever channels you want untouched and the tool will respect her boundaries ✨

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👀 SEE ALSO 👀

blind(7), blind-single-colour(1), blind-set-alpha(1), blind-set-luma(1), blind-invert-luma(1), blind-set-saturation(1) — go read those too, they're the rest of the friend group 🫶💖

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👑 AUTHORS 👑

Mattias Andrée <maandree@kth.se> — the actual main character who made this 🎀

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okay that's the whole page, bestie!! and for the cute little sign-off: this is blind 1.1, page for BLIND-ARITHM(1) in the General Commands Manual — mwah, go do some math on a video 💅✨🍓