[PD] buffer overflow with pix_image

[David Powers]

I had some recent problems of a similar nature, using pix_multiimage -
ie. memory is never freed but just keeps increasing as new images are
loaded. I was advised to try converting the images into a single
video, and playing the video instead. The way I do it, is to let the
video play linearly into a buffer, and actually output the buffer into
[pix-texture], but this is a workaround, because in the newer Gem,
nonlinear playing doesn't seem to be working yet for WinXP...

However, with my approach, I'm not sure how to line up the frame rate
of the video, with a metro + counter that sends images into the
buffer. Since I do glitchy stuff, it's not important, but for you it
might be.

~David

On 9/13/06, user @ earweego <pd at earweego.net> wrote:
> hello list,
>
> for an installation in ZKM, we are using a GEM-based patch
> where a dozen of cubes are textured via [pix_image] with jpg-images of 35kB on avg.
> each cube changes its image about once per second,
> and we are getting heavy crashes after less than an hour.
>
> using a MAC Dual G5 with  OS X 10.4.4, 1.25GB RAM
> and PD version pd++_0_39_1 by James Tittle
> which is amazing for the rest - even fixed the tedious titlebar issue :)
>
> apparently, the image buffer is not cleared after the new image was loaded, and thus the RAM is overflowing. We could work around this problem by changing the images less often, but it feels dirty as it would just _delay_ the crash to a time beyond exhibition duration.
> Would it help if the images had smaller pixel sizes and thus take less memory?
> I guess the bug is known, but is anybody able to fix it before the opening in one week ?
>
> any hint would be greatly appreciated,
> bests,
>   .hh.
>
>
>
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