| Author |
Message |
Mac
Guest
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 Posted:
Thu Nov 03, 2005 5:30 pm Post subject:
What determines frame rate? |
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I have a webcam with a max of 25 fps and WME is attempting to broadcast at
25fps at 282 Kbps. I know it won't achieve this but I have seen it acheive
over 10 fps. Now it seems stuck on 5fps. What confuses me is that the input
stats also show 5fps.
What is going on? Is the camera really only supplying 5fps? Why does WME not
encode at max rate when NO client is connected to the stream?
I suppose what I am realy trying to do is tune WME to make the most use of
the input capabilty of my webcam (a Logitech Quickcam Web), and the best use
of the output bandwidth I have on a 1Mb DSL connection (ie upload about 240
Kb) . I only expect one other to connect to my stream. and wish to optimise
it for them.
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Neil Smith [MVP Digital M
Guest
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| Posted:
Thu Nov 03, 2005 5:30 pm Post subject:
Re: What determines frame rate? |
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On Thu, 3 Nov 2005 17:07:01 -0000, "Mac" <mac@nospam.com> wrote:
| Quote: | I have a webcam with a max of 25 fps and WME is attempting to broadcast at
25fps at 282 Kbps. I know it won't achieve this but I have seen it acheive
over 10 fps. Now it seems stuck on 5fps. What confuses me is that the input
stats also show 5fps.
|
Is the "Max 25fps" at 320x240 and you've set it to send data at
640x480 ? It's common for cheap webcams to drop frame rates
drastically at higher capture resolutions according to the spec on the
back of the box it came in...
HTH
Cheers - Neil
| Quote: | What is going on? Is the camera really only supplying 5fps? Why does WME not
encode at max rate when NO client is connected to the stream?
I suppose what I am realy trying to do is tune WME to make the most use of
the input capabilty of my webcam (a Logitech Quickcam Web), and the best use
of the output bandwidth I have on a 1Mb DSL connection (ie upload about 240
Kb) . I only expect one other to connect to my stream. and wish to optimise
it for them.
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| Back to top |
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Mac
Guest
|
| Posted:
Thu Nov 03, 2005 5:30 pm Post subject:
Re: What determines frame rate? |
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I should add the Max combined frame rate in the stats panel says 282 Kbps,
but what it achieves from moment to moment varies between 100 & 240+ Kbps
Why is this?
"Mac" <mac@nospam.com> wrote in message
news:ekckIkJ4FHA.3036@TK2MSFTNGP15.phx.gbl...
| Quote: | I have a webcam with a max of 25 fps and WME is attempting to broadcast at
25fps at 282 Kbps. I know it won't achieve this but I have seen it acheive
over 10 fps. Now it seems stuck on 5fps. What confuses me is that the input
stats also show 5fps.
What is going on? Is the camera really only supplying 5fps? Why does WME
not encode at max rate when NO client is connected to the stream?
I suppose what I am realy trying to do is tune WME to make the most use of
the input capabilty of my webcam (a Logitech Quickcam Web), and the best
use of the output bandwidth I have on a 1Mb DSL connection (ie upload
about 240 Kb) . I only expect one other to connect to my stream. and wish
to optimise it for them.
|
|
|
| Back to top |
|
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Mac
Guest
|
| Posted:
Thu Nov 03, 2005 9:30 pm Post subject:
Re: What determines frame rate? |
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|
No, I am sure it is sending at 320x240 (it was resizing to a slightly higher
size - but I have already forced it to use original size), and have
confirmed this by opening the internet facing URL in WMP - it's definite
320x240, which is what I am trying to optimise WME for.
Are there any websites that have some collected wisdom on WME, much like
some MVPs have done for other MS tools eg PapaJohn's site for WMM, Jonathan
Kay's for Messenger?
"Neil Smith [MVP Digital Media]" <neil@nospam.com> wrote in message
news:lpjkm1lmhgprh84n1nt6q9l4kn5pvfp040@4ax.com...
| Quote: | On Thu, 3 Nov 2005 17:07:01 -0000, "Mac" <mac@nospam.com> wrote:
I have a webcam with a max of 25 fps and WME is attempting to broadcast at
25fps at 282 Kbps. I know it won't achieve this but I have seen it acheive
over 10 fps. Now it seems stuck on 5fps. What confuses me is that the
input
stats also show 5fps.
Is the "Max 25fps" at 320x240 and you've set it to send data at
640x480 ? It's common for cheap webcams to drop frame rates
drastically at higher capture resolutions according to the spec on the
back of the box it came in...
HTH
Cheers - Neil
What is going on? Is the camera really only supplying 5fps? Why does WME
not
encode at max rate when NO client is connected to the stream?
I suppose what I am realy trying to do is tune WME to make the most use of
the input capabilty of my webcam (a Logitech Quickcam Web), and the best
use
of the output bandwidth I have on a 1Mb DSL connection (ie upload about
240
Kb) . I only expect one other to connect to my stream. and wish to
optimise
it for them.
|
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|
| Back to top |
|
|
Neil Smith [MVP Digital M
Guest
|
| Posted:
Fri Nov 04, 2005 9:30 pm Post subject:
Re: What determines frame rate? |
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|
On Thu, 3 Nov 2005 18:21:29 -0000, "Mac" <mac@nospam.com> wrote:
| Quote: | No, I am sure it is sending at 320x240 (it was resizing to a slightly higher
size - but I have already forced it to use original size), and have
confirmed this by opening the internet facing URL in WMP - it's definite
320x240, which is what I am trying to optimise WME for.
|
OK let's go to the Encoder menu, choose Tools->Options->Performance
Does it encode at the specified rate if you drag the sliders down to
"Better Performance" ? How about the other direction ?
| Quote: | Are there any websites that have some collected wisdom on WME, much like
some MVPs have done for other MS tools eg PapaJohn's site for WMM, Jonathan
Kay's for Messenger?
|
Yeah there are loads of them - Zarax has one, and there's this lot
http://www24.brinkster.com/thorsten123/faq/mpeg2/WME.htm
Have a look at the PAL square pixels setting and other stuff.
Converting colour spaces eg between RGB and YUY2 can be quite
processor intensive too. What does your task manager tell you about
the CPU usage when you're encoding ?
In general a lot of people use this program so it's quite easy to get
advice out of google ;-)
Cheers - Neil
| Quote: | "Neil Smith [MVP Digital Media]" <neil@nospam.com> wrote in message
news:lpjkm1lmhgprh84n1nt6q9l4kn5pvfp040@4ax.com...
On Thu, 3 Nov 2005 17:07:01 -0000, "Mac" <mac@nospam.com> wrote:
I have a webcam with a max of 25 fps and WME is attempting to broadcast at
25fps at 282 Kbps. I know it won't achieve this but I have seen it acheive
over 10 fps. Now it seems stuck on 5fps. What confuses me is that the
input
stats also show 5fps.
Is the "Max 25fps" at 320x240 and you've set it to send data at
640x480 ? It's common for cheap webcams to drop frame rates
drastically at higher capture resolutions according to the spec on the
back of the box it came in...
HTH
Cheers - Neil
What is going on? Is the camera really only supplying 5fps? Why does WME
not
encode at max rate when NO client is connected to the stream?
I suppose what I am realy trying to do is tune WME to make the most use of
the input capabilty of my webcam (a Logitech Quickcam Web), and the best
use
of the output bandwidth I have on a 1Mb DSL connection (ie upload about
240
Kb) . I only expect one other to connect to my stream. and wish to
optimise
it for them.
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