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Can't play mp4 files (case 37125)

  1. #1

    Can't play mp4 files (case 37125)

    I am trying to program a really simple experiment in DirectRT where a short video is played and then participants make a response. I can get avi files to play but for some reason I cannot get my mp4 files (which play in media player) to play in DirectRT. I have attached all of the relevant files and stimuli and have reduced the experiment to a single line in the csv file. Any help would be appreciated. I have tried saving the videos under different resolutions and frame rates and have also changed the bit depth in the colour.text file. No luck. Thanks in advance for your time.

  2. #2
    What version of DirectRT are you using?

  3. #3
    I am using the 2016 version.

  4. #4
    Please use the following URL to download and install the 2018 version of MediaLab to try with your files. Once installed, send us the ID code beginning with M18 to service@empirisoft.com while referencing case 37125 and we'll send you a trial license to activate MediaLab 2018 for 21 days:

    empirisoft.com/download/ml2018/ml2018.1.107.exe

  5. #5
    Thank you. I will download the software on Monday or Tuesday.

  6. #6
    Tell me, did this method help you solve your problem?

  7. #7
    Tell me, did this method help you solve your problem?


    To be honest, I was in a time crunch, and even if it did work, I didn't have the time nor money to install it on 20+ computers. Thus, I decided to present the stimuli as separate pictures and sounds, rather than combining the AV stimuli into videos.

  8. #8
    I got it, thanks for the answer!