[Vnc2swf-users] Res: AssertionError limits recording time

[<lfk...@ya...>]

Hi,

VNC protocol uses rectangles to send screen updates to the client.
When you record or transform into shape format (not video), vnc2swf creates a swf object for each rectangle.  Usually there are many rectangles in each screen update when the screen changes often but there may be none when the screen is not updated.
One thing many people don't realize is that any icon or label that changes very often (such as network connection icon or even the clock with seconds or even msn) and is not related to the recording may be increasing the size of the recording and the number of objects created.
So anything that changes on screen causes a rectangle update.  The size of the rectangle depends on the area changed. It the small areas far apart change, there will be two rectangle updates.  If they are close, there may be just one.
I suggest removing icons that are not necessary while recording.
What I want to say is that frame count is not the only limiting factor.
I think that object count is even more important and it is probably what's been limiting the recordings.
You could try converting to video format, or even to flv (audio not supported yet).
They won't have the object count limit (I think).
Good luck!

Luis Fernando




----- Mensagem original ----
De: Nitin Chandrachoodan <ni...@ee...>
Para: vnc...@li...
Enviadas: Quinta-feira, 21 de Agosto de 2008 1:19:54
Assunto: [Vnc2swf-users] AssertionError limits recording time

Hello,

I am using pyvnc2swf 0.9.2 (from Debian testing) to record lectures in
class (I write on a tablet using Xournal in VNC and record the VNC
session along with audio using the -S option).

After about 30-45 minutes, the program crashes with an error

  File "/usr/share/pyvnc2swf/swf.py", line 784, in newid
    assert self.objid < 65536, 'the number of objects exceeded the limit!'
AssertionError: the number of objects exceeded the limit!

I tried reducing the framerate as suggested in other messages, but
even with a framerate of 3 it still crashed before the end of the
lecture (<50 minutes).

I then tried recording to .vnc format, and it records the whole
lecture, but if I try converting to swf with vnc2swf-edit.py, it again
crashes with the same AssertionError.

One of the previous messages mentioned a maximum of 16000 frames,
which should still give > 5000s at 3fps. Is the above error to do with
frames, or are the VNC changes recorded as objects, which would maybe
make it crash if I wrote too much in one session?

Thanks,

Nitin

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