Choppy Desktop Capture

About encoding, codec settings, muxers and filter usage
geogauci
New Cone
New Cone
Posts: 8
Joined: 17 Jul 2008 13:44

Choppy Desktop Capture

Postby geogauci » 10 Mar 2009 14:22

Hi!
I've been trying to capture the Desktop and stream it over wifi in real-time. The problem is that even when I play locally the captured video stream in real-time, playback is very choppy; playback seems to be around 2fps! Currently I'm using Windows XP; playback on Linux running on a VM is much smoother, but I need to capture video from Windows.
Settings used:
frame rate: 10fps - 24 fps
encapsulation: ASF
Video codec: MPEG4/Theora/divX3
Bitrate: 1200-2000kb/s
resolution: 512x384

Any combination of the above settings yielded the same results!

Hardware resources are not an issue (I'm using a high-end PC, and CPU usage is very low). Any ideas? Can I even hope for smooth streaming of a windows desktop?

warrick
New Cone
New Cone
Posts: 3
Joined: 09 Mar 2009 14:51

Re: Choppy Desktop Capture

Postby warrick » 10 Mar 2009 14:42

Hello,

Maybe this is surprising but afer a lot of tries, I use a my webcam to stream my desktop. The webcam gave me an 30fps real-time image.

Kind Regards,
Jose.

geogauci
New Cone
New Cone
Posts: 8
Joined: 17 Jul 2008 13:44

Re: Choppy Desktop Capture

Postby geogauci » 10 Mar 2009 15:20

Well, the end result should include a (small) number of virtual machines, all of them streaming video using vlc, so I can't use the webcam solution in this case :(

Jean-Baptiste Kempf
Site Administrator
Site Administrator
Posts: 37523
Joined: 22 Jul 2005 15:29
VLC version: 4.0.0-git
Operating System: Linux, Windows, Mac
Location: Cone, France
Contact:

Re: Choppy Desktop Capture

Postby Jean-Baptiste Kempf » 10 Mar 2009 17:25

--screen-fps value?
Jean-Baptiste Kempf
http://www.jbkempf.com/ - http://www.jbkempf.com/blog/category/Videolan
VLC media player developer, VideoLAN President and Sites administrator
If you want an answer to your question, just be specific and precise. Don't use Private Messages.

geogauci
New Cone
New Cone
Posts: 8
Joined: 17 Jul 2008 13:44

Re: Choppy Desktop Capture

Postby geogauci » 11 Mar 2009 10:53

What do you mean? Under windows I am achieving very low frame rates (visibly obvious, but not measured), whatever the frames per second set in VLC. I tried reducing the screen resolution to 800*600(minimum) and scale the output to 0.5 but the result was always the same. The monitor refresh rate is set to 60Hz. I even tried to lower the Colour quality to 16bit; the colours in the VLC desktop capture become messed up, but playback is still choppy....


Return to “VLC stream-output (sout)”

Who is online

Users browsing this forum: No registered users and 3 guests