JVC camera and Hauppauge PVR-150 framegrabber.

JVC camera and Hauppauge PVR-150 framegrabber.

[peter]

With a manual setting of the device path and ID, the V4L2 Test Bench 
produced this image from a JVC TK-1070U camera on a microscope.  
http://easthope.ca/JVCtoPVR150screen.jpg

Setting the device in the Test Bench each time it is opened becomes 
tedious and no /etc/*v4l* exists.  Can the default configuration be 
adjusted permanently without recompiling?  How?

Although too dark, the image from the microscope slide is faintly 
visible. The upper half of the image is on the bottom of the screen 
and the lower half is at the top.  On a VCR I might try adjusting 
vertical sync.  Is there an equivalent in the Test Bench?

Thanks,                           ... Peter E. 
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Re: JVC camera and Hauppauge PVR-150 framegrabber.

[Mauro Carvalho Chehab]

Em Thu, 23 Mar 2017 17:04:21 -0700
peter@easthope.ca escreveu:

> With a manual setting of the device path and ID, the V4L2 Test Bench 
> produced this image from a JVC TK-1070U camera on a microscope.  
> http://easthope.ca/JVCtoPVR150screen.jpg
> 
> Setting the device in the Test Bench each time it is opened becomes 
> tedious and no /etc/*v4l* exists.  Can the default configuration be 
> adjusted permanently without recompiling?  How?
> 
> Although too dark, the image from the microscope slide is faintly 
> visible. The upper half of the image is on the bottom of the screen 
> and the lower half is at the top.  On a VCR I might try adjusting 
> vertical sync.  Is there an equivalent in the Test Bench?

You could use v4l2-ctl to set all parameters you need in order to
get a good quality image.

It is possible to automatically call it by adding a udev rule.
This link explains how to do things like that (although their
examples are for different use cases):

	https://www.mythtv.org/wiki/Device_Filenames_and_udev

Some of examples have a directive like:
	PROGRAM="..."

With basically makes udev to run a program or script when the device
gets detected.


Thanks,
Mauro