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• SNAP : Simulation and Neuroscience Application Platform [closed]

  19 avril 2024, par S_S

  Is there any documentation/help manual on how to use SNAP (Simulation and Neuroscience Application Platform)1.

  



  I wanted to run the Motor Imagery sample scenario with a .avi file for the stimulus instead of the image. How can that be done ?

  



  The following error is obtained when using the AlphaCalibration scenario which gives code to play an avi file.Any help appreciated

  



  :movies:ffmpeg(warning): parser not found for codec indeo4, packets or times may be invalid.
:movies:ffmpeg(warning): max_analyze_duration 5000000 reached at 5000000
:movies(error): Could not open /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi
:audio(error): Cannot open file: /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi
:audio(error): Could not open audio /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi
:movies:ffmpeg(warning): parser not found for codec indeo4, packets or times may be invalid.
:movies:ffmpeg(warning): max_analyze_duration 5000000 reached at 5000000
:movies(error): Could not open /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi
:gobj(error): Texture "/e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi" exists but cannot be read.
Traceback (most recent call last):
  File "E:\BCI_Feb2014\SNAP-master\src\framework\latentmodule.py", line 458, in _run_wrap
    self.run()
  File "modules\BCI\AlphaCalibration.py", line 30, in run
Exception during run():
    m = self.movie(self.moviefile, block=False, scale=[0.7,0.4],aspect=1.125,contentoffset=[0,0],volume=0.3,timeoffset=self.begintime+t*self.awake_duration,looping=True)
Could not load texture: bird.avi
  File "E:\BCI_Feb2014\SNAP-master\src\framework\basicstimuli.py", line 348, in movie
    tex = self._engine.base.loader.loadTexture(filename)
  File "E:\BCI_Feb2014\Panda3D-1.8.0\direct\showbase\Loader.py", line 554, in loadTexture
    raise IOError, message
IOError: Could not load texture: bird.avi


  


• FFmpeg calculating incorrect duration for image to MP4 video build

  16 avril 2020, par Gracie

  I am trying tobuild a 15 second MP4 file (beach.mp4) - from 3 static images that show for 3, 5 and 7 seconds in sequence.
However, the total MP4 duration built by FFmpeg is 19 seconds. So 4 seconds are being added on somewhere, this also applies when using duration.
The image sizes are 1920px x 1080px, which should conform with the yuv420p command

  



  SEQUENCE.TXT

  



  file beach1.jpg outpoint 3 file beach2.jpg outpoint 8 file beach3.jpg outpoint 15

  



  FFMPEG COMMAND

  



  ffmpeg -f concat -i sequence.txt -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest beach.mp4

  



  You can download or view the files at https://lifeisabeach.netlify.app/ (For some strange reason the MP4 length when built locally is 19 seconds, when it should be 15 !)

  



  Where are the extra seconds coming from ? How can I instruct FFmpeg to calculate the exact duration ?

  


• Revision 31219 : Pour compatibilité avec les recommandations des squelettes Z. Les classes ...

  31 août 2009, par rastapopoulos@… — Log

  Pour compatibilité avec les recommandations des squelettes Z.
  Les classes ne sont pas encore fixées, donc il vaut mieux ne pas les utiliser intensément. Mais je pense que cette structure couvre tous les cas et est lisible.
  Le but des classes est de ne pas imposer des balises particulières.

  Titre facultatif

  • Un truc