Re: [Vnc2swf-users] Res: playback issues with vnc2swf 0.9.3

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 422-6466

Hello Luis,

Thank you for your work on the flv code!  The screen recording/playback
mode was the reason I wanted to use pyvnc2swf.  I ran into problems with
pyvnc2swf's built-in playback code and being able to export to flv let
me use an external player, avoiding those issues.

I worked around the lack of audio support by using ffmpeg instead of
mencoder.  mencoder was producing files only mplayer could play, but
ffmpeg worked perfectly.  I used a command like:
  ffmpeg -i video.flv -i voice.mp3 -acodec copy -vcodec copy out.flv

Here is the result:
  http://excess.org/article/2008/07/oclug-june-kernel-walkthrough/

I had to manually clip the audio to match the video, but that's not a
big problem.

The only issue remaining for me is what appears to be a memory leak in
pyvnc2swf during recording.  It would be nice if I could just let it run
for a couple hours without restarting the capture.

I will post some step-by-step instructions to my site and this list some
time soon.

Regards,
Ian

lfk...@ya... wrote:
> Hi Ian,
> 
> Audio in FLV output hasn't been implemented.
> Some time ago there were some requests for implementing flv output to
> pvnc2swf.
> I had some spare time so I played with it a bit and managed to make it work.
> I sent the modifications to the list to check if that was what they wanted.
> Yusuke included it in a new release some time after that.
> The flv format allows two types of encoding.  One is for video in
> general, used by YouTube.
> The other was designed for screen recording/playback.  That's the one
> pvnc2swf uses. And that's why some people
> complained that the flv file generated by pvnc2swf didn't play in some
> players when using flv codec. The problem is
> that the codec being used didn't implement this encoding format.
> I had planned to work in the sound part after making sure the video part
> was ok.
> But nobody said anything about it.  Actually after some time some people
> complained that it didn't play in some players.
> So I ended up losing interest in it.
> But if there is interest for this I can at least take a look at it again.
> 
> Regards,
> 
> Luis Fernando
> .
> 
> ----- Mensagem original ----
> De: Ian Ward <ia...@ex...>
> Para: General discussion about vnc2swf <vnc...@li...>
> Enviadas: Quinta-feira, 3 de Julho de 2008 13:54:17
> Assunto: Re: [Vnc2swf-users] playback issues with vnc2swf 0.9.3
> 
> Now I've run into something else.  When I convert my .swf file to a .flv
> file I lose the audio.  I tried adding the audio before converting, at
> the same time, and after converting all with the same result.
> 
> Is there something I'm missing or has adding audio to flv files not been
> implemented?
> 
> (I also tried using mencoder to add the audio, which worked with mplayer
> but not with other flash players)
> 
> Ian
> 
> Ian Ward wrote:
>> Hello,
>>
>> I have recorded a presentation using vnc2swf and I nam having trouble
>> with playback on some browsers, some of the time.
>>
>> I have posted the .swf files here:
>>
>> http://excess.org/kernel-walkthrough/2008-06-26-pres/
>> http://excess.org/kernel-walkthrough/2008-06-26-code1/
>> http://excess.org/kernel-walkthrough/2008-06-26-code2/
>>
>> The current issue I'm having is with seeking.  On FF3 the seek bar
>> donesn't appear at all, on Galeon they appear but sometimes don't allow
>> the position to be adjusted properly (they work for me one day, not the
>> next).  Is there anything I'm doing that looks incorrect?
>>
>>
>> Some other issues I was able to work around/ignore:
>>
>> The first file had major problems after I recorded it: It would stop
>> playing after about 22 minutes, I could seek past but the video would be
>> frozen.  I worked around that issue by reducing the frame rate to 4
>> frames/second (swf-edit -r 4 -R 3 ...)
>>
>> The second and third files did not have the same problem but when I
>> tried reducing the frame rate on the third one it would produce a file
>> that was truncated for some reason.
>>
>> If I include an <img> in the HTML below the swf file the seek bar would
>> not appear some of the time.  I (partially) worked around that issue by
>> putting the images in separate page and including the video HTML in an
>> <iframe>.
>>
>> I seem to get two seek bars when I try to open the above pages in Safari
>> on a Mac (and seeking doesn't work properly).
>>
>> The pyvnc2swf script seems to consume more and more memory as it is
>> recording.  This is the reason I broke the presentation up into 3 parts.
> 
> 
> -------------------------------------------------------------------------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
> Vnc2swf-users mailing list
> Vnc...@li...
> <mailto:Vnc...@li...>
> https://lists.sourceforge.net/lists/listinfo/vnc2swf-users
> 
> ------------------------------------------------------------------------
> Novos endereços, o Yahoo! que você conhece. Crie um email novo
> <http://br.rd.yahoo.com/mail/taglines/mail/*http://br.new.mail.yahoo.com/addresses>
> com a sua cara @ymail.com ou @rocketmail.com.
> 
> 
> ------------------------------------------------------------------------
> 
> -------------------------------------------------------------------------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Vnc2swf-users mailing list
> Vnc...@li...
> https://lists.sourceforge.net/lists/listinfo/vnc2swf-users