Re: Usability Tests

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On Tuesday 04 February 2003 02:39, Peter Klein wrote:
> I think we can assemble a version till end of next week. The whole
> report will be ready at end of march.

excellent.. these sorts of documents and findings are crucial to the 
improvement of Free Software desktops..

it doesn't help us in our aim of bringing the HIGs into a common location, but 
it will help make them (and the respective desktops) better ...

> Concerning ScreenRecording: Does anybody know a tool which runs under
> linux?

yes.. the following is courtesy of Tim Jansen ... the instructions show how to 
create a .swf (flash) file of the animation, to boot. all with Free software. 
an example of the output can be seen at:

	http://www.tjansen.de/krfb/demo.html

i'm sure that you'd be able to pipe the vnc recording into other media formats 
as well...

VNC2SWF (making a flash demo movie) HowTo
- -----------------------------------------------------


1. Install vncserver
Install vncserver, which is hopefully part of your distribution. Suse calls 
the package "vnc". Otherwise get it from www.tightvnc.com. Try to find rpms as
compilation is not trivial (vncserver is actually a XFree 3.3.x fork with a 
special VNC graphics driver).


2. Change vncserver startup script
If you have never used vncserver before, start it using

        vncserver :10

It will ask you for a password and create create its configuration directory 
in $HOME/.vnc (this is the only purpose of this exercise). Then shut it down 
using

        vncserver -kill :10

Now edit the file $HOME/.vnc/xstartup to start kde instead of twm. Usually the 
following should be enough:

#!/bin/sh
startkde&


3. Start vncserver
Now start vncserver for the first time with KDE:

        vncserver -geometry 800x600 :10

800x600 is the resolution, you can use any other resolution. :10 is the 
display number. Every other display number under 100 is fine, I just took 10 
to avoid a conflict with Desktop Sharing servers. (Like X11 vnc uses the 
display number for the port of the server, displaynumber+5900=port)

You should now be able to connect to your server using 

        krdc -h :10

or

        vncviewer :10

(-h tells krdc that it is a fast connection, it is like selecting "high 
quality" in the dialog)


4. Install ming
Grab ming 0.2a from http://ming.sourceforge.net/.
Grab my ming patch from 
http://www.unixuser.org/~euske/vnc2swf/ming-input-stream.patch
Unpack ming, enter the directory, patch it using 
        patch -p1 < path/to/ming-input-stream.patch
Compile and install:
        make
        su
        make install


5. Install vnc2swf
Grab vnc2swf 0.2 from http://www.unixuser.org/~euske/vnc2swf/
Grab my mp3 patch from 
http://www.unixuser.org/~euske/vnc2swf/vnc2swf-mp3.patch
Unpack vnc2swf, enter the directory and patch it using
        patch -p1 < path/to/vnc2swf-mp3.patch

Compile and install:
        xmkmf -a
        make
        su
        make install


6. Record your movie

        vnc2swf -dumpfile test.swf -framerate 15 :10

Replace test.swf with the name/path of your flash file, and change framerate 
if you like to. :10 is the display number of the vncserver. You stop the 
recording by closing the window.

If you want a mp3 soundtrack, use

        vnc2swf -dumpfile test.swf -soundfile sound.mp3 -framerate 15

vnc2swf does not re-encode your mp3, so you probably want to encode the mp3 
with settings that dont need too much bandwidth (22 khz/mono/32 kbit is ok 
and does not sound too bad, especially for voice).

I haven't managed to get live recording to work, since all recording tools 
seem to write the sound data in large chunks - vnc2swf would need a real 
streaming input.


7. Create the HTML page

To embed the movie in a HTML page, you need to upload the *.swf file and use 
the following tag in a HTML page:
<embed src="test.swf" width="800" height="600" 
type="application/x-shockwave-flash"></embed>

The src must contain the path to the swf file, width and height must match the 
vncserver geometry of your recording.


8. Stop the vncserver

If you are finished with recording or want to restart the server, kill it 
using

        vncserver -kill :10

- --------------

- -- 
Aaron J. Seigo
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

"Everything should be made as simple as possible, but not simpler"
    - Albert Einstein
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