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  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (6508)

  • Python ImageIO : Too many open files

    24 août 2017, par orbv12

    I am using imageio in python in order to open all video files in a directory and convert them to numpy arrays.

    Here is the script I am using :

      1 from __future__ import print_function
    
  2 from avi_to_numpy import *
    
  3 from os import listdir
    
  4 import numpy as np
    
  5 import imageio 
    
  6       
    
  7 class_path = '../Diving/'
    
  8 max_frames = 16
    
  9 stride = 8
    
 10 videos = [vid for vid in listdir(class_path)]
    
 11 train = []
    
 12 
    
 13 for vid in videos:
    
 14     print(str.format('Loading {}...', vid), end="")
    
 15     filename = class_path + vid
    
 16     reader = imageio.get_reader(filename, 'ffmpeg')
    
 17     frames = []
    
 18     
    
 19     for i, im in enumerate(reader):
    
 20         if len(frames) == max_frames:
    
 21             break
    
 22         
    
 23         if i % stride == 0:
    
 24             frames.append(im)
    
 25     
    
 26     reader.close()
    
 27     train.append(np.array(frames))
    
 28     print('done')        
    
 29 
    
 30 
    
 31 print(len(train))

    Eventually this script crashes with the following error output :

    Traceback (most recent call last):
    
  File "load_class_test.py", line 16, in <module>
    
    reader = imageio.get_reader(filename, 'ffmpeg')
    
  File "/usr/local/lib/python2.7/site-packages/imageio/core/functions.py", line 111, in get_reader
    
    return format.get_reader(request)
    
  File "/usr/local/lib/python2.7/site-packages/imageio/core/format.py", line 158, in get_reader
    
    return self.Reader(self, request)
    
  File "/usr/local/lib/python2.7/site-packages/imageio/core/format.py", line 207, in __init__
    
    self._open(**self.request.kwargs.copy())
    
  File "/usr/local/lib/python2.7/site-packages/imageio/plugins/ffmpeg.py", line 260, in _open
    
    self._initialize()
    
  File "/usr/local/lib/python2.7/site-packages/imageio/plugins/ffmpeg.py", line 326, in _initialize
    
    stdout=sp.PIPE, stderr=sp.PIPE)
    
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in __init__
    
    errread, errwrite)
    
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1223, in _execute_child
    
    errpipe_read, errpipe_write = self.pipe_cloexec()
    
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1175, in pipe_cloexec
    
    r, w = os.pipe()
    
OSError: [Errno 24] Too many open files
    
</module>

    I am closing the Reader object from imageio. It seems as if the files opened by ffmpeg are not being closed properly.

    Is there an obvious step I am missing here ? Am I closing the files properly ?

    EDIT : Found temporary solution. Opened a new issue on github.

    I was able to resolve the issue by uncommenting the following lines of code from ’imageio/plugins/ffmpeg.py’ :

    381         def _close_streams(self):
    
382             for std in (self._proc.stdin,
    
383                         self._proc.stdout,
    
384                         self._proc.stderr):
    
385                 try:
    
386                     std.close()
    
387                 except Exception:  # pragma: no cover
    
388                     pass

    I then added a call to the above function in _close(self) :

    271         def _close(self):
    
272             self._terminate(0.05)  # Short timeout
    
273             self._close_streams()
    
274             self._proc = None

    I am not sure what the side effects of doing this are, but it provides a solution for me.

    Here is the link to the issue : https://github.com/imageio/imageio/issues/145

  • Open native library failed in JavaCV

    14 janvier 2016, par tuantv

    I’m trying to use JavaCV in Android but appears error when load library using Eclipse IDE.

    I copied libraies javacv.jar, javacpp.jar, ffmpeg.jar, opencv.jar to folder /libs/. And I also copied *.so libraries in ffmpeg-android-arm.jar and opencv-android-arm.jar to folder /libs/armeabi/

    Here’s the error when call FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("filepath") :

    01-14 08:39:16.539 : D/dalvikvm(2065) : Trying to load lib /data/app-lib/org.bytedeco.javacv.recordactivity-2/libavutil.so 0xa50820c8

    01-14 08:39:16.539 : D/dalvikvm(2065) : Added shared lib /data/app-lib/org.bytedeco.javacv.recordactivity-2/libavutil.so 0xa50820c8

    01-14 08:39:16.547 : D/dalvikvm(2065) : No JNI_OnLoad found in /data/app-lib/org.bytedeco.javacv.recordactivity-2/libavutil.so 0xa50820c8, skipping init

    01-14 08:39:16.551 : D/dalvikvm(2065) : Trying to load lib /data/app-lib/org.bytedeco.javacv.recordactivity-2/libavcodec.so 0xa50820c8

    01-14 08:39:16.555 : D/dalvikvm(2065) : Added shared lib /data/app-lib/org.bytedeco.javacv.recordactivity-2/libavcodec.so 0xa50820c8

    01-14 08:39:16.555 : D/dalvikvm(2065) : No JNI_OnLoad found in /data/app-lib/org.bytedeco.javacv.recordactivity-2/libavcodec.so 0xa50820c8, skipping init

    01-14 08:39:16.559 : D/dalvikvm(2065) : Trying to load lib /data/app-lib/org.bytedeco.javacv.recordactivity-2/libjniavcodec.so 0xa50820c8

    01-14 08:39:16.643 : D/houdini(2065) : [2065] Loading library(version : 2.0.5.42475 RELEASE)... successfully.

    01-14 08:39:16.643 : D/houdini(2065) : [2065] Open Native Library /data/app-lib/org.bytedeco.javacv.recordactivity-2/libjniavcodec.so failed.

    01-14 08:39:16.647 : E/dalvikvm(2065) : dlopen("/data/app-lib/org.bytedeco.javacv.recordactivity-2/libjniavcodec.so") failed : dlopen failed : "/data/app-lib/org.bytedeco.javacv.recordactivity-2/libjniavcodec.so" has unexpected e_machine : 40

  • Open .avi with OpenCV 2.4 & Ubuntu 11.04

    25 juin 2012, par CTZStef

    I try to open and read video files in .avi format using OpenCV. Here is my code :

    void MainWindow::on_actionOuvrir_fichier_triggered()
    
 140    +   {
    
 141    +    //mettre a -1 streamId
    
 142    +    streamId = -1;
    
 143    +    //ouvrir fenetre navigation fichiers pour recuperer path vers .avi
    
 144    +    QString fileName = QFileDialog::getOpenFileName(this,tr("Ouvrir fichier video"),"/home",
    
 145    +    tr("Videos (*.avi)"));
    
 146    +    std::string utf8_text = fileName.toUtf8().constData();
    
 147    +    //ouvrir .avi
    
 148    +    capture = new VideoCapture(utf8_text);
    
 149    +    //check ouverture
    
 150    +    if(!capture->isOpened())
    
 151    +    cout &lt;&lt; "probleme ouverture fichier video" &lt;&lt; endl;
    
 152    +    //calculer delay between each frame in ms
    
 153    +    rate = capture->get(CV_CAP_PROP_FPS);
    
 154    +    delay = 1000 / rate;
    
 155    +    //demarrer timer recordId
    
 156    +    recordId = startTimer(delay);
    
 157    +    //capture premiere frame
    
 158    +    if(!capture->read(in))
    
 159    +    cout &lt;&lt; "probleme lecture frame fichier video" &lt;&lt; endl;
    
 160    +   }

    I get no problem at compilation time, but I can't open a video file. While in debug mode I saw that string utf8_text had the good absolute path to my video, so obviously the problem comes from the constructor of the VideoCapture object. Then, I tried to install every codec pack I could or thought was relevant. But the problem is still there, capture->isOpened() still returns false, and in debug mode I can see that capture contains nothing.

    I am lost here, don't know what to try next. Any idea ??

    Thanks !!!

    [EDIT]
    Just in case, here is the output of ffmpeg -i myFile.avi

    faraday@faraday-Compaq-Evo-D510-e-pc:~/QtProjects/visionDev$ ffmpeg -i 1.avi
    
FFmpeg version 0.6.6-4:0.6.6-0ubuntu0.11.04.1, Copyright (c) 2000-2010 the Libav developers
    
  built on Jun 12 2012 16:28:21 with gcc 4.5.2
    
  configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
    
  WARNING: library configuration mismatch
    
  libavutil   configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavcodec  configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavformat configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavdevice configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavfilter configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libswscale  configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libpostproc configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libavfilter    1.19. 0 /  1.19. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
Input #0, avi, from &#39;1.avi&#39;:
    
  Duration: 00:02:35.39, start: 0.000000, bitrate: 110595 kb/s
    
    Stream #0.0: Video: rawvideo, bgr24, 640x480, 15 tbr, 15 tbn, 15 tbc
    
At least one output file must be specified

    I do not see anything wrong here, but I thought maybe someone will.

    I really need this to work soon, and right now it's a dead end...

    thanks

    [EDIT 2]

    I have just read this in the book OpenCV 2 Computer Vision Application Programming Cookbook by R. Laganiere :

    It is important to note that in order to open the specified video
    file, your computer must have the corresponding codec installed,
    otherwise cv::VideoCapture will not be able to understand the input
    file. Normally, if you are able to open your video file with a video
    player on your machine (such as the Windows Media Player), then OpenCV
    should also be able to read this file.

    Well, on my machine it is not that easy mister Laganiere... I hate this book.

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