[solved] File Pool & Resolution on Linux

Comments

• sebastiaan

  March 2012 edited 7:39AM

  Hi Jakub,

  Ow that's simply compression. .tar.gz files are compressed archives, kind of like a zip file (you can open them with 7-zip). The (almost) 10:1 compression ratio is a lot though! The images are probably easy to compress for some reason.

  Cheers!
  Sebastiaan

  
  
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• jakubch

  March 2012 edited 7:39AM

  Ok, they contain a lot of black background, so that's probably why. There is however one thing I don't understand - when I try to run the same experiment on Oneiric, I get this:

  Error: Runtime error
Description: 'nom8.BMP' could not be found in sketchpad 'nombre'. Make sure that the file is present in the file pool (or specify the full location of the image in the script editor).

  All bmp files ARE present in the filepool (not to mention than on Win 7 it works just fine.) I thought it would be something with storing the files but now that I understand everything really IS inside the filepool (although compressed), I'm somewhat puzzled. The debug output doesn't say much:

  Python 2.7.2
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 '/home/jakub/Projects/2012 MS STUDY/3 presentation/Experiment builds/subject-0.csv' as logfile
experiment.run(): experiment started at Tue Mar 27 21:47:25 2012


  In both systems I use legacy back-end.
• sebastiaan

  March 2012 edited 7:39AM

  Could it be a capitalization issue? I believe that Windows is case-insensitive, whereas Linux is (with most filesystems) case sensitive. So if the bitmap is named, say, nom8.bmp but you refer to it as nom8.BMP this would explain why it only works on Windows.

  
  
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• jakubch

  March 2012 edited March 2012

  Yes, you are right. After typing the file suffix in lower case it started to work.

  Yet something odd happens: While on Windows the sketchpad gets displayed as intended (meaning, one of the 12 bmp 1000x750 images on black background), on Oneiric the image gets stretched (it seems that the width dimension gets stretched all along the 1200 pixels of my lap's monitor width). Would this be the same issue as we discussed in the other thread, that is, graphics card drivers on linux or is it something else?
• sebastiaan

  March 2012 edited 7:39AM

  Hi Jakub,

  If the resolution of the experiment doesn't match the host resolution (as is probably the case here), there are two things that can happen: a) the display resolution is temporarily changed, or b) the display is "padded" to match the host resolution.

  And, as you suspect, which of these happens depends on the operating system and the backend. One way to make sure that you get consistent behaviour is simply by making sure that the resolution of the experiment matches the host resolution.

  Note that in 0.25 there is a bug with changing the resolution using the GUI, so you'll have to edit the 'general script' in the main tab of the experiment. Or you can use the latest 0.26 snapshot, which should be officially released one of these days.

  • http://forum.cogsci.nl/index.php?p=/discussion/87/opensesame-0-26-earnest-einstein-pre-release-packages#Item_1

  Cheers!
  Sebastiaan

  
  
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• jakubch

  March 2012 edited 7:39AM

  Ahh, ok! I was tweaking the resolution inside the GUI to no avail. Now I know why.

  Thanks!