Differences between current version and predecessor to the previous major change of OV519WebCam.
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| Newer page: | version 19 | Last edited on Wednesday, October 5, 2005 10:14:13 am | by IanMcDonald | |
| Older page: | version 18 | Last edited on Friday, September 23, 2005 9:46:02 am | by IanMcDonald | Revert |
@@ -1,20 +1 @@
-The OV519 chip is used in some cheap webcams for example, from
[DSE
] as well in the Sony ~EyeToy
.
-
-There is a driver (licensed under the [GPL]) that you can download from http://alpha.dyndns.org/ov511/download.html#ov51x - the module will be called ov51x. It should work with 2.2, 2,4 and 2.6 kernels.
-
-Unfortunately, these cameras serve images up in [JPEG] format only, and this behaviour will require application-level support. No webcam software for [Linux] seems to handle this (yet - at least for [V4L] version 1). The source code for the driver (linked above) comes with a small program that can grab and save [JPEG] images from the camera. JohnMcPherson has a modified version of this program that will display captured video in an X window -
-grab the "showvideo" package from [our software archive|http://www.wlug.org.nz/archive/software/ov51x/].
-
-You can also code the decompression in the [Kernel] space! Take a look at the decompression for ov518: it is very very close to [JPEG] decompression.
-But there are patents about [JPEG] decompression and that is why - as far as I understand - the module doesn't handle [JPEG] decompression in [Kernel] space..
-But an individual that coded it for himself (and his friends ;) ) would not have to fear those patents... and the ov519 would work anywhere no mater with what app!
-
-One such driver is now available for download from the following website: http://www.rastageeks.org/ov51x-jpeg/
-
--- The [LinuxKernel] maintainers would not allow something like [JPEG] decompression inside a kernel module... they will argue (correctly) that this is something that should be done in userspace.
-
--- That is not totally correct. WebCam decompression is being done in kernel but the biggest obstacle has been (and why it keeps coming out of the LinuxKernel) is that code was not clean room. Also note about patents is not correct - you can still be prosecuted as an individual - less likely but you still can. Having seen [JohnMcPherson]'s comment below it confirms my memory that the problem was people stealing code from Philips and not [JPEG] being the issue. IanMcDonald
-
--- [JPEG] is not a patent-encumbered format, [AFAIK]. JohnMcPherson
-
--- [JPEG] itself may not be patented - it is a rather common mathematical compression BTW, but the file format that uses that compression, the [JFIFF] is patented [AFAIK]. Romain Beauxis
+Describe
[OV519WebCam
] here
.
