texture memory cleanup

1

Hello,

I use a windows platform and 3.0.13 version of PTB. I have an experiment where I present a different  set of images (120 images for each set). Each image is about 92 Kb presented at 30 Hz. since I have a total amount of 52 image sets, I don't load them all at the beginning, rather, load each cell of 120 images before this set is to be shown. Unfortunately, this  takes more than 8 seconds to load for each set. Moreover, loading time increase incrementally.  Hence, I think this is  related to the texture memory-that it somehow save all previous sets.   

Is there a way to  clear texture memory load after loading the cell of images, before loading the next cell? 



-A new video (image set) should run every 12 seconds and each video's duration is 4 seconds. 

The relevant part of the code: 


        %load new video

        video_cell = cell(1, params.fpv);

        A = order_mat(cur_video, 1);

        B = order_mat(cur_video, 2);

        stimulus_num = order_mat(cur_video, 3);

        for frame_num = 1:params.fpv

            video_cell{frame_num} =     ...

                Screen('MakeTexture', window, imread(fullfile...

                ('..', 'stimuli',['A', num2str(A), 'B', num2str(B)],...

                num2str(stimulus_num),[num2str(frame_num),'.jpg'])));

        end

        

     

Thank you very much!

Shahar


2
Have a look at Screen('Close'). Very needed if you don't free after each run indeed, you must be running out of memory.

Cheers,
Dee

On Tue, Dec 13, 2016 at 12:54 PM, shahar.aberbach@... [PSYCHTOOLBOX] <PSYCHTOOLBOX@yahoogroups.com> wrote:


Hello,

I use a windows platform and 3.0.13 version of PTB. I have an experiment where I present a different set of images (120 images for each set). Each image is about 92 Kb presented at 30 Hz. since I have a total amount of 52 image sets, I don't load them all at the beginning, rather, load each cell of 120 images before this set is to be shown. Unfortunately, this takes more than 8 seconds to load for each set. Moreover, loading time increase incrementally. Hence, I think this is related to the texture memory-that it somehow save all previous sets.

Is there a way to clear texture memory load after loading the cell of images, before loading the next cell?



-A new video (image set) should run every 12 seconds and each video's duration is 4 seconds.

The relevant part of the code:


%load new video

video_cell = cell(1, params.fpv);

A = order_mat(cur_video, 1);

B = order_mat(cur_video, 2);

stimulus_num = order_mat(cur_video, 3);

for frame_num = 1:params.fpv

video_cell{frame_num} = ...

Screen('MakeTexture', window, imread(fullfile...

('..', 'stimuli',['A', num2str(A), 'B', num2str(B)],...

num2str(stimulus_num),[ num2str(frame_num),'.jpg'])));

end

Thank you very much!

Shahar