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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


  


• SNAP : Simulation and Neuroscience Application Platform

  2 décembre 2014, par Sumit

  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 zip stream c++

  26 janvier 2018, par Javier Ramírez

  I have the following code at the start to load a video from a file

    SwsContext *img_convert_ctx = NULL;
  
    AVFormatContext *pFormatCtx = NULL;
  
    AVCodecContext  *pCodecCtx = NULL;
  
    AVCodec *pCodec = NULL;
  
    AVFrame *pFrameRGB = NULL;
  
    AVFrame *pFrame = NULL;
  
    uint8_t *buffer = NULL;
  
    AVPacket packet;
  
  
  
    av_register_all();
  
    if(avformat_open_input(&pFormatCtx,"video.avi",NULL,NULL) != 0)return GL_FALSE;
  
    if(avformat_find_stream_info(pFormatCtx,NULL) < 0)return GL_FALSE;
  
    av_dump_format(pFormatCtx,0,"video.avi",0);
  
  
  
    pCodecCtx = pFormatCtx->streams[0]->codec;
  
    pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
  
    if(pCodec == NULL)return GL_FALSE;
  
    if(avcodec_open2(pCodecCtx,pCodec,NULL) < 0)return GL_FALSE;
  
  
  
    pFrame    = av_frame_alloc();
  
    pFrameRGB = av_frame_alloc();
  
  
  
    GLint numBytes;
  
    numBytes  = avpicture_get_size(AV_PIX_FMT_RGB24,pCodecCtx->width,pCodecCtx->height); //obsoleto
  
    buffer    = (uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
  
    avpicture_fill((AVPicture *)pFrameRGB,buffer,AV_PIX_FMT_RGB24,pCodecCtx->width,pCodecCtx->height); //obsoleto
  
    img_convert_ctx = sws_getContext(pCodecCtx->width,pCodecCtx->height,pCodecCtx->pix_fmt,pCodecCtx->width,pCodecCtx->height,AV_PIX_FMT_RGB24,SWS_BICUBIC,NULL,NULL,NULL);
  
  
  
    GLuint fotograma;
  
    GLuint vboLienzo;
  
    GLuint vboImagen;
  
    GLuint CuadroAnc;
  
    GLuint CuadroAlt;
  
    double ticks = 0.0;
  
    int frameFin = 0;
  
  
  
    glGenTextures(1,&fotograma);
  
    glBindTexture(GL_TEXTURE_RECTANGLE_ARB,fotograma);
  
    glTexParameteri(GL_TEXTURE_RECTANGLE_ARB,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
  
    glTexParameteri(GL_TEXTURE_RECTANGLE_ARB,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
  
    glTexImage2D(GL_TEXTURE_RECTANGLE_ARB,0,GL_RGB,pCodecCtx->width,pCodecCtx->height,0,GL_RGB,GL_UNSIGNED_BYTE,NULL);
  
  
  
    CuadroAnc   = pCodecCtx->width;
  
    CuadroAlt   = pCodecCtx->height;
  
    GLfloat anc = (GLfloat)pCodecCtx->width/2;
  
    GLfloat alt = (GLfloat)pCodecCtx->height/2;
  
    GLfloat datos[8] = {-anc,alt,-anc,-alt,anc,-alt,anc,alt};
  
    GLfloat dtext[8]  = {0.0,0.0,0.0,alt*2.0f,anc*2.0f,alt*2.0f,anc*2.0f,0.0};
  
  
  
    glGenBuffers(1,&vboLienzo);
  
    glBindBuffer(GL_ARRAY_BUFFER,vboLienzo);
  
    glBufferData(GL_ARRAY_BUFFER,sizeof(datos),datos,GL_STATIC_DRAW);
  
  
  
    glGenBuffers(1,&vboImagen);
  
    glBindBuffer(GL_ARRAY_BUFFER,vboImagen);
  
    glBufferData(GL_ARRAY_BUFFER,sizeof(dtext),dtext,GL_STATIC_DRAW);

  But now I want to read the video from a zip file. I already have how to extract the data from the zip file, but I do not know what function of ffmpeg I should use to read the data from the zip file.