toucam pro framerate

I've tried setting my Toucam Pro webcam (SC1 modification) to 60 frames per second at
320x240 resolution and when I load an AVI file into VirtualDub, it says that the framerate
is 30 fps. Is it possible to get 60 fps on USB2.0 with this camera? I intend to use the camera
for meteor capture. I guess 30 fps would be plenty for my purposes, but I'm just curious
why it can't achieve 60 fps. I guess my computer is fast enough - Pentium 3.06GHz, MSI
865PE motherboard, a half gigabyte of ram, 7200rpm hard drive, and a fresh installation
of Windows XP Pro with no other processes running such as antivirus and no other
peripherals connected except the camera itself.


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"Dave" wrote in message
...
I've tried setting my Toucam Pro webcam (SC1 modification) to 60 frames
per second at
320x240 resolution and when I load an AVI file into VirtualDub, it says
that the framerate
is 30 fps. Is it possible to get 60 fps on USB2.0 with this camera? I
intend to use the camera
for meteor capture. I guess 30 fps would be plenty for my purposes, but
I'm just curious
why it can't achieve 60 fps. I guess my computer is fast enough - Pentium
3.06GHz, MSI
865PE motherboard, a half gigabyte of ram, 7200rpm hard drive, and a fresh
installation
of Windows XP Pro with no other processes running such as antivirus and no
other
peripherals connected except the camera itself.

The TouCams are all USB 1.1, I believe, so bandwidth is limited
to about 12Mbps which may be your problem - you'll have to
work out what bandwidth you need for those settings.
I have a ProII with the firmware RAW mod and I can't get better
than 5fps at 640x480 for this reason.
HTH
--
Rob

You might also consider that at 60 frames per second, the maximum exposure times
have to be less than 16 milliseconds, and that's not accounting for the readout
times. This might be another reason for.the limitation to 30 frames a second.

--
----------------------------------------------------------------------
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Let inspired figures of light pass by
The Mighty Light of ten thousand suns
Challenges infinity, and is soon gone




"Rob Hemmings" wrote in message
...

"Dave" wrote in message
...
I've tried setting my Toucam Pro webcam (SC1 modification) to 60 frames
per second at
320x240 resolution and when I load an AVI file into VirtualDub, it says
that the framerate
is 30 fps. Is it possible to get 60 fps on USB2.0 with this camera? I
intend to use the camera
for meteor capture. I guess 30 fps would be plenty for my purposes, but
I'm just curious
why it can't achieve 60 fps. I guess my computer is fast enough - Pentium
3.06GHz, MSI
865PE motherboard, a half gigabyte of ram, 7200rpm hard drive, and a fresh
installation
of Windows XP Pro with no other processes running such as antivirus and no
other
peripherals connected except the camera itself.

The TouCams are all USB 1.1, I believe, so bandwidth is limited
to about 12Mbps which may be your problem - you'll have to
work out what bandwidth you need for those settings.
I have a ProII with the firmware RAW mod and I can't get better
than 5fps at 640x480 for this reason.
HTH
--
Rob

On Thu, 2 Feb 2006 16:46:49 -0000, Rob Hemmings
wrote:


"Dave" wrote in message
...
I've tried setting my Toucam Pro webcam (SC1 modification) to 60 frames
per second at
320x240 resolution and when I load an AVI file into VirtualDub, it says
that the framerate
is 30 fps. Is it possible to get 60 fps on USB2.0 with this camera? I
intend to use the camera
for meteor capture. I guess 30 fps would be plenty for my purposes, but
I'm just curious
why it can't achieve 60 fps. I guess my computer is fast enough -
Pentium
3.06GHz, MSI
865PE motherboard, a half gigabyte of ram, 7200rpm hard drive, and a
fresh
installation
of Windows XP Pro with no other processes running such as antivirus and
no
other
peripherals connected except the camera itself.

The TouCams are all USB 1.1, I believe, so bandwidth is limited
to about 12Mbps which may be your problem - you'll have to
work out what bandwidth you need for those settings.
I have a ProII with the firmware RAW mod and I can't get better
than 5fps at 640x480 for this reason.
HTH



--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/


If you use the raw mod with the toucam it should set the frame rate to 5
fps,
any more then 5 fps and the video image is compressed,

(have a quick search of google for details on the mods)

less then 5fps and the video remains uncompressed so that you get
the best possible uncompressed frames.


as for setting it to 60fps try videoing a clock or something and then
watching the video, you might find that the 30fps is the playback rate
and it did record at 60fps, ie the clock appears to run slow.