[open] Error: Source and destination surfaces need the same format. ????

pshahim

Hello everyone,

We tried to run our experiment on another computer than we were used to. We get this error: Source and destination surfaces need the same format.

We already tried to adjust the pixellevels, but this didn't work. When we run the experiment, it shows the instructions but when the actual task should begin, it stops and shows the error.

The computer is from the brand "Eizo" with a screen from " FlexScan S1932"

Please help!!!

sebastiaan

Hi,

Could you post the full error message, which you can find in the debug window? Please also include the relevant script, if the error results from an inline_script, and information about the operating system and back-end that you're using.

Cheers!
Sebastiaan

pshahim

This is the message displayed in the debug window:

Python 2.6.1
Type "help()", "copyright()", "credits()" or "license()" for more information.
Type "modules()" for details about installed modules and version information.
Use the "print [msg]" statement in inline_script items to print to this debug window.
>>> 
openexp.sampler._legacy.init_sound(): sampling freq = 48000, buffer size = 512
openexp._canvas.legacy.init_display(): enabling hardware surface
openexp._canvas.legacy.init_display(): enabling double buffering
openexp._canvas.legacy.init_display(): video mode ok
experiment.init_log(): using 'F:/defaultlog.csv' as logfile (ascii)
experiment.run(): experiment started at Mon Mar 31 14:19:15 2014
Traceback (most recent call last):
  File "G:\Programmatuur\opensesameportable-0.26-pre6-1-win32\opensesame-0.26\libqtopensesame\qtopensesame.py", line 1647, in run_experiment
  File "F:\opensesameportable-0.26-4\opensesame-0.26\libopensesame\experiment.py", line 258, in run
    self.items[self.start].run()
  File "F:\opensesameportable-0.26-4\opensesame-0.26\libopensesame\sequence.py", line 59, in run
    self.experiment.items[item].run()
  File "F:\opensesameportable-0.26-4\opensesame-0.26\libopensesame\loop.py", line 152, in run
    if _item.prepare():
  File "F:\opensesameportable-0.26-4\opensesame-0.26\libopensesame\sequence.py", line 119, in prepare
    if not self.experiment.items[_item].prepare():
  File "F:\opensesameportable-0.26-4\opensesame-0.26\libopensesame\sketchpad.py", line 184, in prepare
    self.canvas.image(self.experiment.get_file(_item["file"]), _item["center"] == 1, _item["x"], _item["y"], _item["scale"])
  File "F:\opensesameportable-0.26-4\opensesame-0.26\openexp\_canvas\legacy.py", line 572, in image
    int(surface.get_height()*scale)))
ValueError: Source and destination surfaces need the same format.
>>> 

We are using an inline script but I don't know if thats the problem, however, this is the inline script were using:

# we will need to import the library that
# we will use to play the sound
import pygame

# first, we check if it is initialized; if it is
# not, we initialize it
if not pygame.mixer.get_init():
    pygame.mixer.init()

# next, we will need to specify the sound
# file (NOTE: this has to be added to your
# file pool!
sound_name = "5-0.wav" # change to your own filename
sound_path = exp.get_file(sound_name)

# now we initialize the sound; this means
# we prepare it so that it can be played
exp.sound = pygame.mixer.Sound(sound_path)

# finally, play the sound! (the -1 indicates
# that it should play infinitely)
exp.sound.play(-1)

sebastiaan

Ok, that's a weird error indeed. As a first step, I would see if you still get this error with the most recent version of OpenSesame. Right now you're using 0.26, which is relatively ancient (almost two years old):

• http://osdoc.cogsci.nl/getting-opensesame/download/

I think there's a good chance that updating will resolve the issue, even though, to be honest, I have no clue what causes it. If an update doesn't resolve things, we'll take it from there.

Cheers!

Edwin

As a potential temporary workaround: could you check if the 'psycho' back-end provides the same error?

hanzh

Hi,

I am having the same error with the latest version of OpenSesame. I am able to run the experiment full screen using expyriment and psychopy backend but not the legacy backend.

Here is my experiment https://drive.google.com/file/d/1aTYxVVqzueYsp-ih2bEcFO9VHK9LfWxH/view?usp=sharing

Thanks!
Han