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Home > Archive > Macromedia Flash Server > April 2005 > screen sharing driver
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screen sharing driver
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| Hello,
This is the first time I post someting here.
I'm a student informatics and for the moment I am busy writing a screen
share thing. I read about the breeze stuff on the mailing list and that
kind of policy of mm really sucks.
Now my question was if there was anybody who already had developed a
screen share plugin/driver. I'm not fond of using Camtasia cause people
have to install 3th party software. What I'm looking for or what I am
trying to develop is a virtual camera driver which see your screen as
the source so Flash can grab it.
Anyone who has any experience with this?
Greetz
Tomzie
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| Dario De Agostini 2005-04-07, 5:56 pm |
| > trying to develop is a virtual camera driver which see your screen as the
> source so Flash can grab it.
> Anyone who has any experience with this?
there has been some chat about it (superficial level anyway) in this list,
try searching the archives.
sorry i can't answer to it right now... let's say it's a problem which does
not regard flash nor flashcomm... so i don't think you will find too much
help in this list.
i have to warn you about some "small" problem...
the way flash encodes data is just not any good for screen sharing things...
too much contrast on each frame and the lack of ability to update only
modified areas mean you will need a HUGE bw to broadcast a simple desktop
(800x600 or more)... wihtout mentioning the HUGE bw peaks you will have on
keyframes.
My advice is to wait for flash 8 ;)
good luck with your project! (cool one  )
Dario De Agostini
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| Fabio Sonnati 2005-04-07, 5:56 pm |
| > i have to warn you about some "small" problem...
> the way flash encodes data is just not any good for screen sharing
> things... too much contrast on each frame and the lack of ability to
> update only modified areas mean you will need a HUGE bw to broadcast a
> simple desktop (800x600 or more)... wihtout mentioning the HUGE bw peaks
> you will have on keyframes.
About this problem, I'm preparing a document in which
I explain how it is possible to efficently use Flash to broadcast
a screen using camtasia and a special optimization.
I have fight for months against the "HUGE bw peaks on keyframe"
and now that I have found a very affordable solution I want
to share it with other Flashcom experts.
I'm writing it just now...
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| David Simmons 2005-04-07, 5:56 pm |
| If you want to do this live, there are a few significant problems, the worst
of which is that the Flash player will encode your video using h.263 video
compression. This looks pretty ugly and is very inefficient for screen
capture (unless you're grabbing normal video off the screen).
If you want to write FLV files and play them from the server, take a look at
http://download.macromedia.com/pub/...ecification.pdf
and see the Video / Screen Video Bitstream Format section. This explains
the alternative lossless codec that works better for screen images.
Hope this helps,
- Dave Simmons
Macromedia Engineering
-----Original Message-----
From: flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org
[mailto:flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org]
Sent: Tuesday, March 29, 2005 7:54 AM
To: FlashComm Mailing List
Subject: [FlashComm] screen sharing driver
Hello,
This is the first time I post someting here.
I'm a student informatics and for the moment I am busy writing a screen
share thing. I read about the breeze stuff on the mailing list and that
kind of policy of mm really sucks.
Now my question was if there was anybody who already had developed a
screen share plugin/driver. I'm not fond of using Camtasia cause people
have to install 3th party software. What I'm looking for or what I am
trying to develop is a virtual camera driver which see your screen as
the source so Flash can grab it.
Anyone who has any experience with this?
Greetz
Tomzie
=-----------------------------------------------------------
Supported by Fig Leaf Software - http://www.figleaf.com
=-----------------------------------------------------------
To change your subscription options or search the archive:
http://chattyfig.figleaf.com/mailman/listinfo/flashcomm
=-----------------------------------------------------------
Supported by Fig Leaf Software - http://www.figleaf.com
=-----------------------------------------------------------
To change your subscription options or search the archive:
http://chattyfig.figleaf.com/mailman/listinfo/flashcomm
| |
| Randy Tinfow 2005-04-07, 5:56 pm |
| Is screen sharing always via compressed video? Does terminal services,
PCAnywhere, or Webex use a codec? I think not.
What amazes me about Webex is that they've been able to take 14 year old
technology, wrap their chrome around it, and ASP it to the tune of
$230mm (projected) in 2004.
I wish we (IMAGE PLANT) had the time to wrap Flashcom around this kind
of screen sharing. =20
RT
> -----Original Message-----
> From: flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org [mailto:flashcomm-
> bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org] On Behalf Of David Simmons
> Sent: Tuesday, March 29, 2005 8:40 PM
> To: FlashComm Mailing List
> Subject: RE: [FlashComm] screen sharing driver
>=20
> If you want to do this live, there are a few significant problems, the
> worst
> of which is that the Flash player will encode your video using h.263
video
> compression. This looks pretty ugly and is very inefficient for
screen
> capture (unless you're grabbing normal video off the screen).
>=20
> If you want to write FLV files and play them from the server, take a
look
> at
>
http://download.macromedia.com/pub/...t_specification
..p
> df
> and see the Video / Screen Video Bitstream Format section. This
explains
> the alternative lossless codec that works better for screen images.
>=20
> Hope this helps,
>=20
> - Dave Simmons
> Macromedia Engineering
>=20
>=20
> -----Original Message-----
> From: flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org
> [mailto:flashcomm-bounces-1Ss2GqJETD3yZ38Mhd3e/9ZfFG6BLHNm@public.gmane.org]
> Sent: Tuesday, March 29, 2005 7:54 AM
> To: FlashComm Mailing List
> Subject: [FlashComm] screen sharing driver
>=20
> Hello,
>=20
> This is the first time I post someting here.
> I'm a student informatics and for the moment I am busy writing a
screen
> share thing. I read about the breeze stuff on the mailing list and
that
> kind of policy of mm really sucks.
> Now my question was if there was anybody who already had developed a
> screen share plugin/driver. I'm not fond of using Camtasia cause
people
> have to install 3th party software. What I'm looking for or what I am
> trying to develop is a virtual camera driver which see your screen as
> the source so Flash can grab it.
> Anyone who has any experience with this?
>=20
> Greetz
> Tomzie
>=20
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> Supported by Fig Leaf Software - http://www.figleaf.com
> =3D-----------------------------------------------------------
>=20
> To change your subscription options or search the archive:
> http://chattyfig.figleaf.com/mailman/listinfo/flashcomm
>=20
> =3D-----------------------------------------------------------
> Supported by Fig Leaf Software - http://www.figleaf.com
> =3D-----------------------------------------------------------
>=20
> To change your subscription options or search the archive:
> http://chattyfig.figleaf.com/mailman/listinfo/flashcomm
=-----------------------------------------------------------
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=-----------------------------------------------------------
To change your subscription options or search the archive:
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| |
| Dario De Agostini 2005-04-07, 5:56 pm |
| >Is screen sharing always via compressed video? Does terminal services,
>PCAnywhere, or Webex use a codec? I think not.
Right... there are TONS of way to create screensharing... sending the
"video" of the captured screen is the worst thing possible... but it's the
only thing possible with current flash.
>What amazes me about Webex is that they've been able to take 14 year old
>technology, wrap their chrome around it, and ASP it to the tune of
>$230mm (projected) in 2004.
well... webex uses an activex/standalone player... like breeze... there are
"no" technical problems creating screen sharing with this situation.
Real problems comes when you want to create it inside a browser
Dario De Agostini
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| Dario De Agostini 2005-04-07, 5:56 pm |
| > About this problem, I'm preparing a document in which
> I explain how it is possible to efficently use Flash to broadcast
> a screen using camtasia and a special optimization.
> I have fight for months against the "HUGE bw peaks on keyframe"
> and now that I have found a very affordable solution I want
> to share it with other Flashcom experts.
> I'm writing it just now...
wow...thanks a lot!
i will be happy to share some information/comment about it
(because i fought against that too)
Dario De Agostini
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