[PD] scrolling with translate

tom tlalim tlalists at gmail.com
Tue Nov 13 02:33:05 CET 2007


thnx for all your help & education.
i feel ready to take it from here.
pd is a powerful tool no dubt.

my performance issue is probably due to the macbook having a not-so
great video card.
i'll try different compressions or jus load the whole bulk.

till next time,

On Nov 13, 2007 1:17 AM, simon wise <simonxwise at hotmail.com> wrote:
> On 13 Nov 2007, at 8:35 AM, tom tlalim wrote:
> > ah, nice one - thanx!
> > great idea to load image parts while scrolling! this enables panoramas
> > of different lengths.
> > the only issue is i get a little jump in scrolling speed when new
> > files get loaded (mine are 1500 X 425 ±400k each)
> yes - it depends on your machine, if it is fast enough then you can
> get away with loading without it being too noticeable, otherwise to
> get it smooth on a slower machine you need to have multiple
> [pix_image] objects and load them all first. Depending on the desired
> results you can play around with the [gemwin] rate and with the
> resolution and compression of your image files (different codecs may
> load faster, no compression could be an advantage and Gem scales
> lower resolutions up quite nicely). You could also try tricks like
> making a ramdisk to hold the files in ram - then loading them to the
> GPU could be faster but I haven't needed to go down that path yet. It
> is possible that you could do the file reading/texturing happen in
> one instance of pd with a lower priority and pass the texture ID
> across to another pd which does the playing - but this may just be
> fantasy and I certainly haven't tried it.
> What I have generally done for performances is make sure nothing
> unnecessary is running on the machines that run the video mixing
> patch, and running pd -nogui controlling everything via a midi fader
> desk or from a pd control patch on another computer on the network.
> This has worked well for me running video clips, live camera and
> still images on several screens from 1 controller.
> simon

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