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Video4Linux Framework. Hans Verkuil. Cisco Systems Norway Low-level sub-device control (/dev/v4l-subdevX, control). 0. Device topology discovery/control Video4Linux, V4L for short, is a collection of device drivers and an API for supporting realtime video capture on Linux systems. It supports many USB webcams, TV tuners, and related devices, standardizing their output, so programmers can easily add video support to events.linuxfoundation.org/images/stories/pdf/lceu2012_debski.pdf This documentation is free software; you can redistribute it and/or modify it under the terms of the GNU General Public. License as published by the Free Sep 15, 2009 - This documentation is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Programming examples can be used and distributed without restrictions. Revision Corrected source and Makefile to generate a PDF. SGML fixes. First draft, based on documentation by Bill Dirks and discussions on the V4L mailing list. 2.6 added dvb and many new v4l drivers and it has grown from 5% to. >9%. Third-largest subsystem after scsi and net. TV capture devices, radio receivers,.Nov 20, 2019 - Video4Linux programming introduction. Introduction. Video4Linux is the name of the linux's video capture software interface. Webcameras, capture cards, tv Made possible to add video codecs acting as filters. - Prior to the introduction of the m2m framework the Video4Linux only supported hardware codecs where