Alcor Micro Corp. Micro Corp.

Don't buyOne bandwidth settingNot sold separately

Its own USB descriptors rule it out for a multi-camera rig.

Offers a single bandwidth setting at 3072 bytes per microframe, so only 2 fit on one USB port and the rest go dark. Not a camera to build a table on.

Bandwidth table read from a real `lsusb -v` dump. 1 isochronous setting, smallest 3072 bytes per microframe. Seen on 173 machines in the dump corpus. lsusb -v gist. VideoStreaming interface (ifnum1) alt 1-3 all report wMaxPacketSize 0x1400 = 3x1024 = 3072 bytes/microframe (only one distinct alt value captured, alt0 excluded). Alcor Micro Corp controller chipset (idVendor 058f).

USB ID: 058f:a001
Fit on one USB port: 2 (at its lowest bandwidth setting)
Bandwidth floor: 3072 bytes per microframe (from a real descriptor dump)
Every bandwidth setting it offers: 3072 bytes per microframe
Seen on: 173 real machines in the dump corpus
What backs this: Its bandwidth table was read out of a real USB descriptor dump from somebody's machine. We have never held this camera, but we know exactly how much of a USB port it reserves.
Source: https://raw.githubusercontent.com/linuxhw/LsUSB/master/Notebook/Hewlett-Packard/2000/2000/

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Part of the Poker Panel webcam database: 4,600 models, with the USB bandwidth numbers that decide how many fit on one port. See the kit we ship.