vnc2swf-users

[Vnc2swf-users] How to record withOUT audio

[Plaschke, H. <pla...@gg...>]

Hello,
we want to use a virtual machine as a gateway for vnc-sessions which
includes recording them using the nice pyvnc2swf-tool.
The problem is: the machine has no (virtual) audio-hardware, so the
start of vnc2swf.py fails.

Does anybody know, how to disable the use of audio and only stream the
video to a file ?

Thannks in advance
  Hubert Plaschke

-----------------------------
plaschke@vncconnect:~$ DISPLAY=":2" /usr/share/pyvnc2swf/vnc2swf.py -n
-o test.swf -p ~/.vnc/passwd
Using pygame 1.7.1release
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:3513:(_snd_config_evaluate) function
snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_concat
returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_refer
returned error: No such file or directory
ALSA lib conf.c:3985:(snd_config_expand) Evaluate error: No such file or
directory
ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM default
usage: vnc2swf.py [-d] [-n] [-o filename] [-t {shape|video|vnc}] [-e
encoding] [-N] [-C clipping] [-r framerate] [-z] [-m] [-a] [-S
subprocess] [-P pwdfile] [host[:display] [port]]
-----------------------------

Re: [Vnc2swf-users] How to record withOUT audio

[The A. <the...@gm...>]

On Mon, Nov 10, 2008 at 7:32 AM, Plaschke, Hubert <
pla...@gg...> wrote:

> Hello,
> we want to use a virtual machine as a gateway for vnc-sessions which
> includes recording them using the nice pyvnc2swf-tool.
>

I wanted to do something similar, but found that pyvnc2swf takes way too
much CPU time.  Instead, I tried running vncrec and piping the output to
gzip.  It uses about 80 times less CPU cycles than pyvnc2swf!  I also found
that "gzip -9" is both stronger compression AND less CPU time than "bzip
-1".

Since my goal was to use the recordings as logs, not for frequent playback,
it doesn't bother me too much that the files I have are raw VNC streams, and
would benefit from running through pyvnc2swf for playback (a tedious
process, but only for use on rare occations).

To get vncrec working as a script, I had to modify it a bit:
 http://aur.archlinux.org/packages.php?ID=16265

As for your audio issue, I can't help... I'm recording from VMs that don't
have sound cards and never had any audio issues.

-- 
The Amigo

Re: [Vnc2swf-users] How to record withOUT audio

[Yusuke S. <yu...@cs...>]

Hubert,

Actually pyvnc2swf does work without audio device.
(These are just warning messages, not errors.)
You just gave a wrong command line here. In the non-GUI mode, you need to 
give the server's address and/or a port number. (pyvnc2swf doesn't 
look into the DISPLAY variable.)  I should've elaborated this in
the documents...

So try:
  /usr/share/pyvnc2swf/vnc2swf.py -n -o test.swf -p ~/.vnc/passwd :2

HTH,
Yusuke

On Mon, 10 Nov 2008 14:32:56 +0100, "Plaschke, Hubert" <pla...@gg...> wrote:
> Hello,
> we want to use a virtual machine as a gateway for vnc-sessions which
> includes recording them using the nice pyvnc2swf-tool.
> The problem is: the machine has no (virtual) audio-hardware, so the
> start of vnc2swf.py fails.
> 
> Does anybody know, how to disable the use of audio and only stream the
> video to a file ?
> 
> Thannks in advance
>   Hubert Plaschke
> 
> -----------------------------
> plaschke@vncconnect:~$ DISPLAY=":2" /usr/share/pyvnc2swf/vnc2swf.py -n
> -o test.swf -p ~/.vnc/passwd
> Using pygame 1.7.1release
> ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
> ALSA lib conf.c:3513:(_snd_config_evaluate) function
> snd_func_card_driver returned error: No such file or directory
> ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
> ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_concat
> returned error: No such file or directory
> ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
> ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_refer
> returned error: No such file or directory
> ALSA lib conf.c:3985:(snd_config_expand) Evaluate error: No such file or
> directory
> ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM default
> usage: vnc2swf.py [-d] [-n] [-o filename] [-t {shape|video|vnc}] [-e
> encoding] [-N] [-C clipping] [-r framerate] [-z] [-m] [-a] [-S
> subprocess] [-P pwdfile] [host[:display] [port]]
> -----------------------------
> 
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