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Date: Mon, 02 Feb 2009 08:12:14 +0100
From: Németh Márton <nm127@...email.hu>
To: Jean-Francois Moine <moinejf@...e.fr>
CC: video4linux-list@...hat.com, LKML <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.28 + Trust 610 LCD PowerC@m Zoom, webcam mode?
Jean-Francois Moine wrote:
> On Sun, 01 Feb 2009 10:24:36 +0100
> Németh Márton <nm127@...email.hu> wrote:
>> Hello Jean-Francois,
>
> Hello Márton,
>
>> I have a Trust 610 LCD PowerC@m Zoom camera which can operate in
>> webcam mode also (USB ID=06d6:0031). I tried to use it together with
>> Linux 2.6.28 and with xawtv-3.95.dfsg.1 and with gqcam 0.9.1.
>> The /dev/video0 appeared, but no usable picture was visible.
>>
>> However, I downloaded
>> http://mxhaard.free.fr/spca50x/Download/gspcav1-20071224.tar.gz and
> [snip]
>> Do you have any idea why the gspcav1 diver is working and the one
>> which is included in Linux 2.6.28 not?
>
> The gspcav1 is not maintained anymore.
>
> It seems that your webcam has not been tested with gspcav2.
Yes, I found your status at page http://moinejf.free.fr/webcam.html .
> First, did you use the v4l library and its wrapper when running xawtv
> and gqcam?
I don't really know, I just installed the xawtv package coming with Debian.
> Then, have you tried my program svv?
I could get the Trust 610 LCD PowerC@m Zoom's webcam mode working with
2.6.28 by doing the following steps:
1. download and compile http://people.atrpms.net/~hdegoede/libv4l-0.5.8.tar.gz
2. download and compile http://moinejf.free.fr/svv.c
3. export LD_LIBRARY_PATH=./libv4l-0.5.8/libv4lconvert/
4. run svv
I tested the following settings, all were working correctly:
$ ./svv
raw pixfmt: JPEG 464x480
pixfmt: RGB3 464x480
mmap method
$ ./svv -m r
raw pixfmt: JPEG 464x480
pixfmt: RGB3 464x480
read method
$ ./svv -m u
raw pixfmt: JPEG 464x480
pixfmt: RGB3 464x480
userptr method
What I recognised is that the gspcav1 with xawtv delivered pictures
in resolution of 288x384, while the version in 2.6.28 in 464x480. I
guess this is an improved resolution, but I don't know why the aspect
ratio changed (288/384 = 3/4 = 0.75, 464/480 = 29/30 = 0.9667).
Thanks for your help!
Regards,
Márton Németh
The output of v4l-info:
### v4l2 device info [/dev/video0] ###
general info
VIDIOC_QUERYCAP
driver : "sunplus"
card : "Trust 610 LCD POWERC@M ZOOM"
bus_info : "0000:00:10.0"
version : 2.3.0
capabilities : 0x5000001 [VIDEO_CAPTURE,READWRITE,STREAMING]
standards
inputs
VIDIOC_ENUMINPUT(0)
index : 0
name : "sunplus"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []
video capture
VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
index : 0
type : VIDEO_CAPTURE
flags : 1
description : "JPEG"
pixelformat : 0x4745504a [JPEG]
VIDIOC_G_FMT(VIDEO_CAPTURE)
type : VIDEO_CAPTURE
fmt.pix.width : 464
fmt.pix.height : 480
fmt.pix.pixelformat : 0x4745504a [JPEG]
fmt.pix.field : NONE
fmt.pix.bytesperline : 464
fmt.pix.sizeimage : 84110
fmt.pix.colorspace : JPEG
fmt.pix.priv : 1
controls
VIDIOC_QUERYCTRL(BASE+0)
id : 9963776
type : INTEGER
name : "Brightness"
minimum : 0
maximum : 255
step : 1
default_value : 0
flags : 0
VIDIOC_QUERYCTRL(BASE+1)
id : 9963777
type : INTEGER
name : "Contrast"
minimum : 0
maximum : 255
step : 1
default_value : 32
flags : 0
VIDIOC_QUERYCTRL(BASE+2)
id : 9963778
type : INTEGER
name : "Color"
minimum : 0
maximum : 255
step : 1
default_value : 26
flags : 0
### video4linux device info [/dev/video0] ###
general info
VIDIOCGCAP
name : "Trust 610 LCD POWERC@M ZOOM"
type : 0x1 [CAPTURE]
channels : 1
audios : 0
maxwidth : 464
maxheight : 480
minwidth : 48
minheight : 32
channels
VIDIOCGCHAN(0)
channel : 0
name : "sunplus"
tuners : 0
flags : 0x0 []
type : CAMERA
norm : 0
tuner
ioctl VIDIOCGTUNER: Invalid argument
audio
ioctl VIDIOCGAUDIO: Invalid argument
picture
VIDIOCGPICT
brightness : 32896
hue : 0
colour : 6168
contrast : 8224
whiteness : 0
depth : 8
palette : unknown
buffer
ioctl VIDIOCGFBUF: Invalid argument
window
VIDIOCGWIN
x : 0
y : 0
width : 464
height : 480
chromakey : 0
flags : 0
--
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