Recording a VNC session
Thu Sep 4 07:50:01 2003
I have already done this (2 years ago) with a cheap software named "snagit"
able to capture all screen in an AVI file at 2 frames per seconds which is
very sufficient for a powerpoint presentation.
This powerpoint presentation was then broadcasted by VNC , the asssociated
sound was also recorded by snagit as it was transmitted by a
videoconferencing software ( "VRVS" )running on the same PC.
The trick to get the sound received (with any software) and recorded at the
same time by snagit consists in having installed 2 sound cards (I.E the
sound card of the mother board plus a SB 128), the first sound card is
associated with the videoconferencing software to receive sound ; its
line-out is connected on the line-in of the second sound-card.
The second sound card is associated with snagit to record.
This is tricky but works perfectly (win 98 on a 500Mhz).
After this you can use "virtual dub" which is a freeware able to convert
your video file into any other video file format , including sound format
I have then converted the original AVI file into Divx for video and mp3 for
The result is approximately 1Mbyte/minute , and we cannot see any
compression effect on the slides (which is strange...) this means that you
can keep more than 10 hours of conference on a CDrom ...
I am sure than we can do better now.
The drawback of snagit is that it creates an intermediate file which is
processed when the recording session is finished , the processing can be
long.... and risky if you didn't manage enough room on your disk
Have also a look at Camtasia which is the big brother of snagit and has much
You can download an evaluation version which is fully functionnal.
Trick : always make video capture ( with any software ) in a separate ,
empty and dedicated partition that you can format if necessary , because
when a capture crashes you can spoil your file system , and also because
when you capture on a blank partition work is much more easy and fast for
your PC as it can write cooly and sequentially on the disk.
Hope this could help
Association EURATOM-CEA sur la Fusion
13108 Saint-Paul-Lez-Durance Cedex, France
Tel. (phone) : + 33 (0) 4 42 25 77 21
Fax : + 33 (0) 4 42 25 26 61
Email : firstname.lastname@example.org
> -----Message d'origine-----
> De : email@example.com
> [mailto:firstname.lastname@example.org]De la
> part de Jim Rowland
> Envoye : mercredi 3 septembre 2003 16:29
> A : email@example.com
> Objet : Recording a VNC session
> Has anyone recorded a VNC session for playback say in training? Anyone
> know of a good third party software that captures a VNC session as a
> MPEG or an AVI?
> VNC-List mailing list
> To remove yourself from the list visit: