Re: [Vnc2swf-users] Res: AssertionError limits recording time

[Nitin C. <ni...@ee...>]

Thanks for the informative replies. As pointed out by you, I think the
problem was that writing using a tablet creates too many small
objects, causing the limit to be exceeded independent of the frames.

I then tried recording to .vnc format and then converting to .swf with
vnc2swf-edit, and when I use the -V option (video) it seems to work
well. I had not realized that the -t video would still result in .swf,
I thought it meant it would create .flv. I assume this means that
directly recording to .swf with -t video will give the same effect -
namely size limited by number of frames, not objects?

Thanks very much,

Nitin




On Thu, Aug 21, 2008 at 7:35 PM,  <lfk...@ya...> wrote:
> 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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