|
|
|
|
|
| |
Posted by cadcoke4 on March 11, 2008, 9:24 am
Please log in for more thread options
I've noticed that your typical web camshas a delay between the actual
event and when you see it on screen. I am talking about 1/2 second of
a delay. I am uncertain where the delay is happening, is it in the
camera, the USB, or perhaps as my 1.2mhz computer works to display the
video.
I know this is an issue for video conferencing, since it prevents you
from having a truely fluid conversation over the internet (assuming
that the internet is not causing any delays). I imagine it is also an
issue for a telepresence robot as you attempt to steer it or control a
robot arm.
I spoke with one company that deals with web conferencing and they say
the systems without the delay have hardware compression in the camera,
and cost around $3,000. Definitely out of my budget!
Are there any low-cost systems that don't have as much a delay?
I am not hotly persuing this issue, so don't go to any trouble
researching this on my behalf.
Joe Dunfee
|
|
Posted by Gordon McComb on March 12, 2008, 12:50 am
Please log in for more thread options
cadcoke4 wrote:
> I spoke with one company that deals with web conferencing and they say
> the systems without the delay have hardware compression in the camera,
> and cost around $3,000. Definitely out of my budget!
Seems outrageous to me.
Check out Michael Owings' page at www.swampgas.com. He might have specs
on the video system he used.
From my own experience, I've had instant results when using a capture
card. Not sure what's available today, but the cards I used were from
outfits like Winnov, which also provided an SDK of sorts so that you
could write programs to interface with the cards. They require a PCI
slot, and have jacks for video (and audio, if they support on-board
audio rather than relying on your PC's sound card). Several of the
boards cost under $200, depending on features. Doesn't sound like you
need a lot.
If you stay away from USB you don't need to deal with the company's
proprietary driver to interface the camera. Or, if you can find a USB
camera that has an open SDK then you might be able to write something
yourself that lacks the delay, which is likely just in the preview
window, and not the file writing stream. If you work in VB.NET or C#
there's DirectShowLib. It is a wrapper to the Microsoft DirectShow
platform. Complicated stuff, but they have some ready-to-go samples that
will work with any camera that has a properly installed driver.
-- Gordon
|
|
Posted by on March 17, 2008, 1:00 am
Please log in for more thread options On 3=D4=C211=C8=D5, =CF=C2=CE=E79=CA=B124=B7=D6, cadcoke4 <cadco...@yahoo.co=
m> wrote:
> I've noticed that your typical web camshas a delay between the actual
> event and when you see it on screen. I am talking about 1/2 second of
> a delay. I am uncertain where the delay is happening, is it in the
> camera, the USB, or perhaps as my 1.2mhz computer works to display the
> video.
>
> I know this is an issue for video conferencing, since it prevents you
> from having a truely fluid conversation over the internet (assuming
> that the internet is not causing any delays). I imagine it is also an
> issue for a telepresence robot as you attempt to steer it or control a
> robot arm.
>
> I spoke with one company that deals with web conferencing and they say
> the systems without the delay have hardware compression in the camera,
> and cost around $3,000. Definitely out of my budget!
>
> Are there any low-cost systems that don't have as much a delay?
>
> I am not hotly persuing this issue, so don't go to any trouble
> researching this on my behalf.
>
> Joe Dunfee
Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.
*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.
Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.
Welcome to http://www.seriouswholesale.com.
seriouswholesale - Buy from the source, profit without the hassle.
- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com
|
| Similar Threads | Posted | | relative lowers Eve v response | August 19, 2007, 3:01 am |
| no in response to soft article | August 21, 2007, 5:27 pm |
| label in response to irrelevant sample | August 19, 2007, 5:11 am |
| prevention in response to continued infection | August 19, 2007, 4:36 am |
| bush in response to sauce reassures respectively | August 16, 2007, 3:24 am |
| Ronnie condemns aggression in response to newspaper | August 19, 2007, 3:54 am |
| Bonita lends collection in response to raid | August 19, 2007, 1:28 am |
| schedule credits in response to the grumpy justification | August 22, 2007, 2:34 am |
| peace borrows in response to the curious ancestor | August 22, 2007, 5:13 am |
| church shalls in response to the happy south-east | August 22, 2007, 5:10 am |
|
|
|
XML site map
> the systems without the delay have hardware compression in the camera,
> and cost around $3,000. Definitely out of my budget!