From: wei kin <kin2031@yahoo.com>
To: video4linux-list@redhat.com
Subject: Re: Unable to achieve 30fps using 'read()' in C
Date: Sat, 29 Nov 2008 00:27:16 -0800 (PST) [thread overview]
Message-ID: <368069.23199.qm@web39708.mail.mud.yahoo.com> (raw)
I installed qc-usb-0.6.6 and gspca-modules-2.6.18-5-xen-686 in my debian 2.6.18-5-xen. Below are what I got:
lsusb
Bus 004 Device 004: ID 046d:0920 Logitech, Inc. QuickCam Express
dmesg | grep usb
usbcore: registered new driver usbfs
usbcore: registered new driver hub
usb usb1: configuration #1 chosen from 1 choice
usb usb2: configuration #1 chosen from 1 choice
usb usb3: configuration #1 chosen from 1 choice
usb usb4: configuration #1 chosen from 1 choice
usb 4-1: new full speed USB device using uhci_hcd and address 2
usb 4-1: configuration #1 chosen from 1 choice
usb usb5: configuration #1 chosen from 1 choice
sda:<6>usb 4-1: USB disconnect, address 2
usb 4-1: new full speed USB device using uhci_hcd and address 3
usb 4-1: configuration #1 chosen from 1 choice
usbcore: registered new driver gspca
usb 4-1: USB disconnect, address 3
usb 4-1: new full speed USB device using uhci_hcd and address 4
usb 4-1: configuration #1 chosen from 1 choice
dmesg | grep Logitech
input: ImPS/2 Logitech Wheel Mouse as /class/input/input2
I did try out the API example in http://www.linuxtv.org/downloads/video4linux/API/V4L2_API/spec/a16706.htm. However, I get error message stated that '/dev/video0 is no V4L2 device'.
Do anyone have any idea?
Thanks,
Rgds
nik2031
On Fri, Nov 28, 2008 at 3:02 AM, wei kin <kin2031@yahoo.com> wrote:
>
Hi all, I am new in v4l programming. What I did in my code is I used
'read( )' in C programming to read images from my Logitech Quickcam
Express. My problem is I can't get 30frames per second, what I got is
just 5fps when I loop and read for 200times. Do anyone know why is it
under performance? Thanks
>
> Rgds,
> nik2031
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next reply other threads:[~2008-11-29 8:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-29 8:27 wei kin [this message]
2008-11-29 8:47 ` Unable to achieve 30fps using 'read()' in C Jean-Francois Moine
-- strict thread matches above, loose matches on Subject: below --
2008-11-30 5:26 wei kin
2008-11-30 8:58 ` Nicolas
2008-11-28 8:02 wei kin
2008-11-28 13:02 ` Jonathan Lafontaine
2008-11-28 15:33 ` Jackson Yee
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