USB video capture? composite, s-video, etc Post: 302370796

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Operating Systems Linux USB video capture? composite, s-video, etc Post 302370796 by Corona688 on Thursday 12th of November 2009 12:00:04 PM

11-12-2009

Registered User

"porting" isn't quite the right word. That implies having access to some other source code to base things off of, and that's almost never the case for hardware drivers. They generally have to write linux drivers from scratch based on device specifications, which manufacturers are often loath to provide. So a lack of a driver doesn't mean "not ported yet", but often means "no specifications available for anyone to even try to make a driver".

Nitpicking aside, it might be better to see what drivers linux has than to randomly google USB hardware. Linux drivers usually list chipsets, not models, since many different things ultimately use the same or similar chipsets hence drivers.

Here's the USB devices the 2.6.27 kernel has available:

Code:

USB Video Class (UVC)
USB GSPCA driver (NEW)
Hauppauge WinTV-PVR USB2 support (NEW)
Empia EM28xx USB video capture support (NEW)
USB video devices based on Nogatech NT1003/1004/1005 (NEW)
USB 3com HomeConnect (aka vicam) support (EXPERIMENTAL) (NEW)
USB IBM (Xirlink) C-it Camera support (NEW)
USB Konica Webcam support (NEW)
USB Logitech Quickcam Messenger (NEW)
USB ET61X[12]51 PC Camera Controller support (NEW)
OmniVision Camera Chip support (NEW)
USB W996[87]CF JPEG Dual Mode Camera support (NEW)
USB OV511 Camera support (NEW)
USB SE401 Camera support (NEW)
USB SN9C1xx PC Camera Controller support (NEW)
USB STV680 (Pencam) Camera support (NEW)
USB ZC0301[P] Image Processor and Control Chip support (NEW)
USB Philips Cameras (NEW)
USB ZR364XX Camera support (NEW)
USB Syntek DC1125 Camera support (NEW)
USB Sensoray 2255 video capture device (NEW)

Highlighted the interesting-looking ones...

UVC is a generic driver that supports most any video device with the UVC device class.
The Hauppage driver is pretty obvious in what devices it's for.
The em28xx driver supports a huge variety of devices.

Last edited by Corona688; 11-12-2009 at 01:24 PM..

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LEARN ABOUT XFREE86

xv

Xv(3X)																	    Xv(3X)

Name
       Xv - X Window System video extension

Description
       The  Xv	extension provides support for video adaptors attached to an X display.  It takes the approach that a display may have one or more
       video adaptors, each of which has one or more ports through which independent video streams pass.

       An adaptor may be able to display video in a drawable, capture video from a drawable, or both.  It translates between video encoding (NTSC,
       PAL,  SECAM,  etc...) and drawable format (depth and visual-id pair). An adaptor may support multiple video encodings and/or multiple draw-
       able formats.

       Clients use Xv(3X) to gain access and manage sharing of a display's video resources.  Typically, a client will use XvQueryExtension(3X)	to
       determine  the  status of the extension, XvQueryAdaptors(3X) to get a description of what video adaptors exist, and XvQueryEncodings(3X) to
       get a description of what video encodings an adaptor supports.

       Once a client has determined what video resources are available, it is free to put video into a drawable or  get  video	from  a  drawable,
       according  the  capabilities  supported.   Clients  can	select	to  receive events when video activity changes in a drawable and when port
       attributes have changed.

Summary of Library Functions
       The following is a summary of Xv library functions:

       XvGetPortAttribute(3X) - return current port attribute value

       XvGetStill(3X) - capture a single frame of video from a drawable

       XvGetVideo(3X) - capture video from a drawable

       XvGrabPort(3X) - lock port for exclusive use by client

       XvPortNotify(3X) - event generated when port attributes change

       XvPutStill(3X) - write a single frame of video to a drawable

       XvPutVideo(3X) - write video into a drawable

       XvQueryAdaptors(3X) - return adaptor information for a screen

       XvQueryBestSize(3X) - determine the optimum drawable region size

       XvQueryEncodings(3X) - return list of encodings for an adaptor

       XvQueryExtension(3X) - return version and revision of extension

       XvSelectPortNotify(3X) - enable or disable XvPortNotify events

       XvSelectVideoNotify(3X) - enable or disable XvVideoNotify events

       XvSetPortAttribute(3X) - set an attribute for a port

       XvStopVideo(3X) - stop active video

       XvUngrabPort(3X) - release a grabbed port

       XvVideoNotify(3X) - event generated for video processing

       Each of these functions is described in its own Xv man page.

XFree86 							   Version 4.7.0							    Xv(3X)