UVCDYNCTRL(1)

💖 UVCDYNCTRL — the libwebcam command line tool, bestie edition 💖

okay so. this is uvcdynctrl, version 0.2.3, from the libwebcam gang. it's a command line tool. it does camera stuff. sit down, hydrate, and let's get into it 🫶

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✨ SYNOPSIS ✨

uvcdynctrl [OPTIONS]... [VALUES]...

that's it. that's the whole shape of it. options, then values, go off 👑

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🌸 DESCRIPTION 🌸

uvcdynctrl 0.2.3 — she manages dynamic controls in uvcvideo. that's the whole gig. dynamic controls. in uvcvideo. iconic honestly.

here's everything she can do, one flag at a time, no skips, no cuts 🎀

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💅 OPTIONS 💅

• -h, --help — prints the full help and then dips out. full help, bestie, not a lil summary. then exit. 🦋
• -V, --version — prints the version and exits. short and sweet, respect.
• -l, --list — lists all the available cameras. look at all your lil guys 👀
• -i, --import=filename — imports dynamic controls from an XML file. yes, XML. it's giving vintage but she works. 💾
• -a, --addctrl=vid — imports dynamic controls for vid from the default location. it knows where they live, don't worry.
• -v, --verbose — turns on verbose output. default is off, so she's quiet unless you ask her to spill. 🙈
• -d, --device=devicename — picks which device to use. default is video0. if you have one camera, this is already handled, you're welcome. 📷
• -c, --clist — lists the available controls. the whole menu, laid out. slay.
• -g, --get=control — grabs the current value of a control. reading era.
• -G, --get_raw=unit_id:selector — grabs the current raw control value. raw as in raw raw. 🔥
• -s, --set=control — sets a new control value. and listen, for negative values you gotta do it like this:

-s 'My Control' -- -42

the -- is doing the heavy lifting there, don't skip it. 💀

• -S, --set_raw=unit_id:selector — sets a new raw control value. the value is a hex string of the control size, and by default it's little endian. wanna flip it? slap a '(BE)' prefix on the front and she'll read it big endian instead. like so:

-S 13:1 0x01100c

or:

-S 13:1 '(BE)0x0c1001'

hex girlies rise 🌈

• -f, --formats — lists the available frame formats. resolution vibes, fps vibes, all of it.
• -W, --save=filename — saves the device controls state to a file. little snapshot, little memory, cute. 🎀
• -L, --load=filename — loads the device controls state from a file. the glow-up restore point. ✨

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👑 SEE ALSO 👑

the full documentation for uvcdynctrl is maintained as a Texinfo manual. so if info and uvcdynctrl are both properly installed at your site, this:

info uvcdynctrl

should hand you the complete manual. no cap. go read it, iykyk 💜

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real talk: if you're out here poking raw control values with -S and -G, know what you're doing first. hex strings, unit ids, selectors — that's main character energy but also it's your hardware. be cute, be careful. 🫶

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and that's the page, bestie!! 🦋 this is from uvcdynctrl 0.2.3, dated Aug 2013, page 7 of the manual. old but gold, fr fr. mwah 💋