Re: [Swftools-common] (OT) changing fps in videos

[Pablo Rodríguez]

On 09/14/2010 10:56 AM, Chris wrote:
> I had no trouble is slowing the video down.  Even having
> two separate videos at different frame rates. However, as
> you might guess, as soon as the frame rate is meddled with
> it screws up the embedded audio, as in you get mostly silence.
>
> I then extracting the mp3, re-encoded it as an swf changing the
> frame rate, then attempted to sync it with the original video.
> That sort of works, but it is quite tricky to get not spot on.
>
> I can post the scraps of swfc code I came up with, but, I'm not
> exactly sure where that leaves us.
>
> Could you redefine your problem?  Why exactly did you wish to
> have two videos at different frame rates.  Is this with or without
> audio?

Chris,

many thanks for your help and sorry for not having answered before.

I was wrong assuming that to embed different videos (video files 
converted into SWF) I should set them to the lowest fps rate. It seems 
to be the highest one, otherwise videos with decreased frame rates will 
be played too slow.

In the meantime, I discovered a way to set a different frame rate in a 
video file, that seems to work, such as “ffmpeg -i saturn5.avi -r 50 
saturn.swf“.

My problem is the following. I recreated this presentation: 
http://www.ousia.tk/freeculture.php and I would like to be able to 
generate presentations like http://lessig.blip.tv/file/3730123/. I tend 
to think that my method is better (thanks to all people involved in 
SWFTools :-)), but it has a major shortcoming: it is not possible to 
embed videos in the final presentation (I'm consciously avoiding 
external playing).

Setting the same frame rate for the SWF containers and all child 
elements seems to solve the problem. I haven't checked it, but I guess 
it should work (sound too).

But there is something I simply don't get. It is possible to generate 
PDF files that contain a SWF video player, such as 
http://flv-player.net/, that plays the embedded video in whichever 
format it might be 
(http://www.ctan.org/tex-archive/macros/latex/contrib/flashmovie/). And 
in this case there is no problem with different frame rates in embedded 
videos. Why is this not possible within SWF files?

Thanks for your help,


Pablo