Groups > linux.debian.user > #187510 > unrolled thread

v4l2 cameras in stretch.

Started by	peter@easthope.ca
First post	2017-10-03 00:40 +0200
Last post	2017-10-03 09:30 +0200
Articles	2 — 2 participants

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  v4l2 cameras in stretch. peter@easthope.ca - 2017-10-03 00:40 +0200
    Re: v4l2 cameras in stretch. deloptes <deloptes@gmail.com> - 2017-10-03 09:30 +0200

#187510 — v4l2 cameras in stretch.

From	peter@easthope.ca
Date	2017-10-03 00:40 +0200
Subject	v4l2 cameras in stretch.
Message-ID	<uwhxv-1HW-13@gated-at.bofh.it>

Another stretch system has a JVC camera connected to a Hauppauge 
framegrabber.  It works no better than the USB camera referenced in the 
header.

guest@imager:/dev$ mpv tv:// --tv-device=/dev/video0
Playing: tv://
[tv] Selected driver: v4l2
[tv]  name: Video 4 Linux 2 input
[tv] Selected device: Hauppauge WinTV PVR-150
[tv]  Tuner cap: STEREO LANG1 LANG2
[tv]  Tuner rxs: MONO
[tv]  Capabilities:  video capture  VBI capture device  tuner  audio  read/write
[tv]  supported norms: 0 = NTSC-M;
[tv]  inputs: 0 = Tuner 1; 1 = S-Video 1; 2 = Composite 1; 3 = S-Video 2; 4 = Composite 2;
[tv]  Current input: 0
[tv]  Current format: unknown (0x4745504d)
[tv] current audio mode is : LANG1
[tv] tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
[tv] ioctl request buffers failed: Inappropriate ioctl for device
[tv] 0 frames successfully processed, 0 frames dropped.
Failed to recognize file format.

Exiting... (Errors when loading file)
guest@imager:/dev$ 

The tuner supports only NTSC-M whereas the camera is delivering PAL?  
The specs aren't helping me.  
http://pro.jvc.com/prof/attributes/specs.jsp?model_id=MDL100970&feature_id=03
Ideas?  

Is any camera working via v4l2 in stretch?  None found here.

Thanks,                   ... Peter E.

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#187518

From	deloptes <deloptes@gmail.com>
Date	2017-10-03 09:30 +0200
Message-ID	<uwpOp-6Bl-3@gated-at.bofh.it>
In reply to	#187510

peter@easthope.ca wrote:

> Is any camera working via v4l2 in stretch?  None found here.

I was using Haupauge PVR like 10y ago. It is possible that the one you have
is not fully supported because of lack of information.
Another option is that you have to configure this and that

http://www.hauppauge.com/site/support/linux.html
https://ubuntuforums.org/showthread.php?t=1634445

hope this helps 

regards

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v4l2 cameras in stretch.

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