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[open] Best practice random video stimuli

edited September 2014 in OpenSesame

Hi,

somehow my post is gone I think. As I asked before, is there any best practice of randomized playing 20 videos from vlc player with measuring keyboard response ?

maybe someone has an example file for this ?

i tried a randomized block loop but it only plays one video.

best,
daniel

Comments

  • edited 6:26PM

    Hi Daniel,

    somehow my post is gone I think.

    Yeah, there were some technical issues and a handful of posts were lost. Sorry about that.

    As I asked before, is there any best practice of randomized playing 20 videos from vlc player with measuring keyboard response ? (...) i tried a randomized block loop but it only plays one video.

    You probably explained this in your previous post, but could you provide some more information? What exactly are you trying to do, what do you have now, and what doesn't work as expected?

    Cheers,
    Sebastiaan

  • edited September 2014

    basically I just want to catch keyboard responses on a set of randomly played videos (10 videos)

    i tried to integrate this into a block loop and trial, but OS stops after the first video.

    best,
    daniel

    ps: find my try here:
    https://www.dropbox.com/s/tsc05qqgf1b44ug/AThingForMoodYogaThingi.opensesame.tar.gz?dl=0

  • edited 6:26PM

    Hm.. I really don't know how I should describe this task in more details ;)
    Randomizing videos shouldn't be that difficult ?

  • edited 6:26PM

    Randomizing videos shouldn't be that difficult ?

    That should be within the realm of possibility, I agree.

    When I run your experiment, the videos don't play at all. But when I replace the videos by avi files, they play fine. So that appears to be a file format issue.

    However, the media_player_vlc doesn't appear to register key presses. This could be a Linux-specific issue, through. Do you have that problem as well?

    @dschreij, Any ideas?

    Cheers,
    Sebastiaan

  • edited October 2014

    Dear sebastiaan,

    both videos run fine (avi and mp4) on my setup. However, after playing the first vid and hitting any key I get back to the text display instead of playing the second, third video. Could you give me your info on what version of OS you are using and what version of the VLC plugin ?

    Best,
    Daniel


    Edit:

    I deleted the keyboard response and it seems that the logger is collecting the key responses from the vlc player loop as well as reaction times. So this is sufficient. Could you confirm this is an OK approach ?

    Best,
    Daniel

    PS: I could not check if keyboard response is working as this resulted in not playing all videos.

  • edited 6:26PM

    both movies operate okay (avi in addition to mp4) in my own build. Even so, immediately after participating in the 1st video in addition to striking virtually any key When i return to the written text screen as opposed to participating in the next, third online video. Is it possible you give me personally your current information on just what version connected with OS that you are making use of in addition to just what version from the VLC plugin?

  • edited 6:26PM

    dear thomas,

    i solved this by deleting the key response. I think it works fine now but I need to find some time for testing if response times are accurate.

    Best,
    Daniel

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