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Project Description

v4l-utils is a collection of various video4linux (V4L) and DVB utilities. libv4l is an accompanying collection of libraries that adds a thin abstraction layer on top of video4linux2 (V4L2) devices. The purpose of this layer is to make it easy for application writers to support a wide variety of devices without having to write separate code for different devices in the same class. It consists of 3 different libraries. libv4lconvert offers functions to convert from any (known) pixel format to V4l2_PIX_FMT_BGR24 or V4l2_PIX_FMT_YUV420. libv4l1 offers the (deprecated) v4l1 API on top of v4l2 devices, independent of the drivers for those devices supporting v4l1 compatibility (which many v4l2 drivers do not). libv4l2 offers the v4l2 API on top of v4l2 devices, while adding support for the application transparent libv4lconvert conversion where necessary.
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2011-07-27 05:58

In v4l2-ctl, support was added for the new bitmask control type and for the control event, along with small bugfixes. qv4l2 gained support for bitmap controls. A new parser for dumps of em28xx with the drxk frontend was added. In libv4l, some more laptop models were added to the upside down devices table, support for the SE401 pixel format was implemented, and software autogain tweaks were made. Several other minor changes were made.
Tags: Minor bugfixes, Minor feature enhancements, Stable

2011-06-13 19:25

Various enhancements to libv4l were made, resulting in significantly less CPU usage with UVC HD cameras in several scenarios. An experimental library was added for associating video, audio, vbi, and other devices with each other, allowing apps, for example, to automatically figure out which ALSA input device carries the audio for a specific corresponding video device. Many more laptop models were added to the table of upside down devices. Support for the M420, Y10B, and JPGL pixel formats was added. The JPEG decompression code was rewritten for speed. Many further enhancements and fixes were made.
Tags: Minor feature enhancements, Minor bugfixes, Stable

2010-09-05 05:01

Many more laptop models were added to the upside down devices table. Short frames are now detected, and up to three retries are initiated to get a non short frame. UVC cameras with more than 16 frame sizes are now properly supported. Support for the Xirlink C-It YYVYUY format and for the Konica YUV420 format were added. In the tools, various v4l-keytable improvements and various qv4l2 fixes were made, and v4l2-ctl gained support for s/g_dv_timings.
Tags: Minor bugfixes, Minor feature enhancements, Stable

2010-05-08 00:52

The new combination of v4l-utils and libv4l is now stable. Various v4l-keytable improvements, v4l2-ctl fixes, and qv4l2 fixes have been made. Many more laptop models have been added to the list of upside-down devices. Some minor bugfixes have been made.
Tags: Minor bugfixes, Minor feature enhancements, Stable

2010-03-15 06:10

This development release combines utilities from the v4l-dvb mercurial kernel as v4l-utils with the previous libv4l into a common distribution. v4l-keytable has been renamed to ir-keytable, and now better supports IR. libv4l adds several laptop models to the list of upside-down devices. Pixart JPEG markers removal was fixed. The whitebalance and gamma defaults of various sonixj and sonixb based cams were improved. Gamma correction is now enabled by default on pac7302 based cams. Convert errors in the first few frames of a stream are now ignored.
Tags: Major feature enhancements, Development

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