Hi all



I am currently working on an application using ARToolkit version 2.68.2. I
am using a "Pyro 1394" webcam which supports 30 frames per second at a
resolution of 640x480.



However the frame rate is always less than 15 fps and I and I am not quite
sure what prevents me from getting higher frame rates. When I open the
dialog box (using showDlg) as camera parameter it is not possible to set the
frame rate to more than 15 fps when the resolution is 640x480.



How can this problem be solved? Any help will be appreciated.



Best regards



Sune Kristensen

It depends on what video library you use and how DirectShow (via the 
library) is set up.

We get 30 fps on lots of different cameras, but we are using our own 
video library, based on the open source "VidCapture" library (look on 
sourceforge).  I thought the commonly distributed libraries (like the 
one from Vienna) could achieve those frame rates.

One thing to do is make sure you have the drivers installed.  If it 
saws "Generic 1394 Camera" or something like that in hardware manager, 
then you are using the default windows drivers, which can only do 15 
fps with these sorts of cameras.

On Nov 5, 2004, at 6:09 AM, Sune Kristensen wrote:

> Hi All
>
>
>
> Thank you for your helpful mails. As Stephen suggested it has turned 
> out
> that the camera can only capture 30 fps in YUV(4:1:1) mode. It is 
> possible
> to capture an .avi clip with high frame rate using the software that 
> came
> with the camera. However when running my ARToolkit application it is 
> not
> possible to select a frame rate over 15 fps in the video dialog.
>
> How can this be avoided? Has anyone achieved to get 30 fps (or more) at
> 640x480 resolution (or higher) in an ARToolkit application with Win XP 
> as
> OS? How was it done?
>
>
>
> Best regards and thank you
>
>
>
> Sune Kristensen
>
>
>
>
>
> ----- Original Message -----
> From: "Sune Kristensen" <sunek@d ..........>
> To: "ARToolKit" <artoolkit@h ..................>
> Sent: Thursday, November 04, 2004 3:26 PM
> Subject: Frame rate problems
>
>
>> Hi all
>>
>>
>>
>> I am currently working on an application using ARToolkit version 
>> 2.68.2. I
>> am using a "Pyro 1394" webcam which supports 30 frames per second at a
>> resolution of 640x480.
>>
>>
>>
>> However the frame rate is always less than 15 fps and I and I am not 
>> quite
>> sure what prevents me from getting higher frame rates. When I open the
>> dialog box (using showDlg) as camera parameter it is not possible to 
>> set
> the
>> frame rate to more than 15 fps when the resolution is 640x480.
>>
>>
>>
>> How can this problem be solved? Any help will be appreciated.
>>
>>
>>
>> Best regards
>>
>>
>>
>> Sune Kristensen
>>

Hi All



Thank you for your helpful mails. As Stephen suggested it has turned out
that the camera can only capture 30 fps in YUV(4:1:1) mode. It is possible
to capture an .avi clip with high frame rate using the software that came
with the camera. However when running my ARToolkit application it is not
possible to select a frame rate over 15 fps in the video dialog.

How can this be avoided? Has anyone achieved to get 30 fps (or more) at
640x480 resolution (or higher) in an ARToolkit application with Win XP as
OS? How was it done?



Best regards and thank you



Sune Kristensen





----- Original Message ----- 
From: "Sune Kristensen" <sunek@d ..........>
To: "ARToolKit" <artoolkit@h ..................>
Sent: Thursday, November 04, 2004 3:26 PM
Subject: Frame rate problems


> Hi all
>
>
>
> I am currently working on an application using ARToolkit version 2.68.2. I
> am using a "Pyro 1394" webcam which supports 30 frames per second at a
> resolution of 640x480.
>
>
>
> However the frame rate is always less than 15 fps and I and I am not quite
> sure what prevents me from getting higher frame rates. When I open the
> dialog box (using showDlg) as camera parameter it is not possible to set
the
> frame rate to more than 15 fps when the resolution is 640x480.
>
>
>
> How can this problem be solved? Any help will be appreciated.
>
>
>
> Best regards
>
>
>
> Sune Kristensen
>

Unfortunatly the WDM driver for this particular camera is very badly
implemented. I would suggest you use the Carnegie Mellon University
DCAM (ask Google) driver. The API is very
simple and easy to use and you can get the promised 30fps RGB-640x480
from the camera.

HTH,
Hartmut



On Fri, 5 Nov 2004 09:22:10 -0500, Blair MacIntyre <blair@c ............> wrote:
> It depends on what video library you use and how DirectShow (via the
> library) is set up.
> 
> We get 30 fps on lots of different cameras, but we are using our own
> video library, based on the open source "VidCapture" library (look on
> sourceforge).  I thought the commonly distributed libraries (like the
> one from Vienna) could achieve those frame rates.
> 
> One thing to do is make sure you have the drivers installed.  If it
> saws "Generic 1394 Camera" or something like that in hardware manager,
> then you are using the default windows drivers, which can only do 15
> fps with these sorts of cameras.
> 
> 
> 
> On Nov 5, 2004, at 6:09 AM, Sune Kristensen wrote:
> 
> > Hi All
> >
> >
> >
> > Thank you for your helpful mails. As Stephen suggested it has turned
> > out
> > that the camera can only capture 30 fps in YUV(4:1:1) mode. It is
> > possible
> > to capture an .avi clip with high frame rate using the software that
> > came
> > with the camera. However when running my ARToolkit application it is
> > not
> > possible to select a frame rate over 15 fps in the video dialog.
> >
> > How can this be avoided? Has anyone achieved to get 30 fps (or more) at
> > 640x480 resolution (or higher) in an ARToolkit application with Win XP
> > as
> > OS? How was it done?
> >
> >
> >
> > Best regards and thank you
> >
> >
> >
> > Sune Kristensen
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Sune Kristensen" <sunek@d ..........>
> > To: "ARToolKit" <artoolkit@h ..................>
> > Sent: Thursday, November 04, 2004 3:26 PM
> > Subject: Frame rate problems
> >
> >
> >> Hi all
> >>
> >>
> >>
> >> I am currently working on an application using ARToolkit version
> >> 2.68.2. I
> >> am using a "Pyro 1394" webcam which supports 30 frames per second at a
> >> resolution of 640x480.
> >>
> >>
> >>
> >> However the frame rate is always less than 15 fps and I and I am not
> >> quite
> >> sure what prevents me from getting higher frame rates. When I open the
> >> dialog box (using showDlg) as camera parameter it is not possible to
> >> set
> > the
> >> frame rate to more than 15 fps when the resolution is 640x480.
> >>
> >>
> >>
> >> How can this problem be solved? Any help will be appreciated.
> >>
> >>
> >>
> >> Best regards
> >>
> >>
> >>
> >> Sune Kristensen
> >>
> 
> 


-- 
technotecture labs, technotecture.com

Hi Hartmut



Thank you for the link. It didn't really work for me since my application
are using 2+ webcams and the CMU doesn't support multiple webcams. However
installing the driver had the pleasant side effect - it allows me to get 30
fps on my Logitech 3000 pro webcam at 640x480, which the camera should not
be able to - strange but great.



Best regards,



Sune Kristensen



----- Original Message ----- 
From: "Hartmut Seichter" <hartmut@g ........>
To: "Sune Kristensen" <sunek@d ..........>
Cc: "ARToolKit" <artoolkit@h ..................>
Sent: Sunday, November 07, 2004 4:54 PM
Subject: Re: Frame rate problems


> Unfortunatly the WDM driver for this particular camera is very badly
> implemented. I would suggest you use the Carnegie Mellon University
> DCAM (ask Google) driver. The API is very
> simple and easy to use and you can get the promised 30fps RGB-640x480
> from the camera.
>
> HTH,
> Hartmut
>
>
>
> On Fri, 5 Nov 2004 09:22:10 -0500, Blair MacIntyre <blair@c ............>
wrote:
> > It depends on what video library you use and how DirectShow (via the
> > library) is set up.
> >
> > We get 30 fps on lots of different cameras, but we are using our own
> > video library, based on the open source "VidCapture" library (look on
> > sourceforge).  I thought the commonly distributed libraries (like the
> > one from Vienna) could achieve those frame rates.
> >
> > One thing to do is make sure you have the drivers installed.  If it
> > saws "Generic 1394 Camera" or something like that in hardware manager,
> > then you are using the default windows drivers, which can only do 15
> > fps with these sorts of cameras.
> >
> >
> >
> > On Nov 5, 2004, at 6:09 AM, Sune Kristensen wrote:
> >
> > > Hi All
> > >
> > >
> > >
> > > Thank you for your helpful mails. As Stephen suggested it has turned
> > > out
> > > that the camera can only capture 30 fps in YUV(4:1:1) mode. It is
> > > possible
> > > to capture an .avi clip with high frame rate using the software that
> > > came
> > > with the camera. However when running my ARToolkit application it is
> > > not
> > > possible to select a frame rate over 15 fps in the video dialog.
> > >
> > > How can this be avoided? Has anyone achieved to get 30 fps (or more)
at
> > > 640x480 resolution (or higher) in an ARToolkit application with Win XP
> > > as
> > > OS? How was it done?
> > >
> > >
> > >
> > > Best regards and thank you
> > >
> > >
> > >
> > > Sune Kristensen
> > >
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Sune Kristensen" <sunek@d ..........>
> > > To: "ARToolKit" <artoolkit@h ..................>
> > > Sent: Thursday, November 04, 2004 3:26 PM
> > > Subject: Frame rate problems
> > >
> > >
> > >> Hi all
> > >>
> > >>
> > >>
> > >> I am currently working on an application using ARToolkit version
> > >> 2.68.2. I
> > >> am using a "Pyro 1394" webcam which supports 30 frames per second at
a
> > >> resolution of 640x480.
> > >>
> > >>
> > >>
> > >> However the frame rate is always less than 15 fps and I and I am not
> > >> quite
> > >> sure what prevents me from getting higher frame rates. When I open
the
> > >> dialog box (using showDlg) as camera parameter it is not possible to
> > >> set
> > > the
> > >> frame rate to more than 15 fps when the resolution is 640x480.
> > >>
> > >>
> > >>
> > >> How can this problem be solved? Any help will be appreciated.
> > >>
> > >>
> > >>
> > >> Best regards
> > >>
> > >>
> > >>
> > >> Sune Kristensen
> > >>
> >
> >
>
>
> -- 
> technotecture labs, technotecture.com
>