Check the formats that the two nodes can stream. "v4l2-ctl --list-formats-ext".
Memory says that uvcvideo (the kernel module responsible for USB Video Class devices) was updated a while back to support providing metadata as well as video data. The two streams come from independent nodes. Linux 4.16 by the looks of it.
Code: Select all
Merge: 2246edf 273caa2
Author: Linus Torvalds <[email protected]>
Date: Tue Feb 6 11:27:48 2018 -0800
Merge tag 'media/v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- add support for UVC metadata
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