[Kdenlive-devel] moved here from kde-multimedia (was Re: Multimedia Frameworks)

[Jason Wood]

On Monday 28 Oct 2002 11:15 am, Rolf Dubitzky wrote:
> > > I don't like the idea of threads for a number of reasons : Firstly, if
> > > the Cutter crashes, it will take the GUI with it. Secondly, we would
> > > still have to allow the Cutter to run as a seperate process so that it
> > > could be run remotely or for batch processing anyway. Thirdly, it would
> > > really screw up my idea of having a scheduler for multiple cutters
> > > distributed on multiiple computers ;-)
>
> Ok, I don't want to get envolved with multiple computers too much, because
> that's my major. But if we want to test this on a 500+ PC cluster at some
> point I can do it. But using a PC cluster to render a movie is trivial. The
> task is intrinsicly parallel if you can make the cutter read a XML file and
> launch it with gst-launch. You just have to tell everybody which frames to
> render and have a seriealizer in the end. That's what I do all day ;-)

I think the main problem with video rendering over a network is more a case of 
bandwidth - To edit at DV quality, you are looking at 3 Meg/second AV files, 
(30 Meg/s or more for some of the more "professional" codecs ) which I think 
could quite easily saturate the network.

The idea I am playing with at the moment is along the lines of : 

Each individual computer would have it's own "local cache" of video files.
The scheduler would know which files each cutter has, and would assign tasks 
to minimise traffic over the network.
Previewing and playback would generally only occur on the GUI computer.
Potentially, multiple GUI's would be connected to the network and the 
scheduler would assign cutters between the GUI's as necessary.

However, I should point out that I am not at this moment in time really 
looking into network rendering - but I don't want to have to rework the 
entire code base when it comes round to implementing it.

Cheers,
Jason

-- 
Jason Wood
Homepage : www.uchian.pwp.blueyonder.co.uk