Recherche avancée

Médias (91)

Autres articles (71)

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

Sur d’autres sites (9535)

  • Saving Raw Uncompressed Video Files using OpenCv, Gstreamer, and/or FFMPEG ?

    20 septembre 2022, par adav0033

    I have been trying to implement the cv::VideoWriter function from OpenCV to generate a an uncompressed (raw) video file. I started this because of a statement within the OpenCV Documentation which I will link here along with the statement.

    


    cv::VideoWriter::VideoWriter    (   const String &  filename,
int     fourcc,
double  fps,
Size    frameSize,
bool    isColor = true 
)       


    


    "If FFMPEG is enabled, using codec=0 ; fps=0 ; you can create an uncompressed (raw) video file."

    


    Ref. https://docs.opencv.org/3.4/dd/d9e/classcv_1_1VideoWriter.html

    


    However whilst troubleshooting the function I came across the refuting statement,

    


    " VideoCapture and VideoWriter do not provide interface to access raw compressed video stream, except maybe MJPEG in some cases.
Make sure you actually use FFmpeg backend by setting apiPreference parameter : VideoWriter("outfile.avi", cv2.CAP_FFMPEG, ...)"

    


    Ref. https://github.com/opencv/opencv/issues/14573

    


    I am now confused about how I go about writing the cv::VideoWriter function to satisfy the requirements to create a raw uncompressed video file (.avi) and if it is even possible. If it is not possible how do I achieve the outcome of saving an raw uncompressed video file, as I assume it would use some combination of FFMPEG, OpenCV,or Gstreamer.

    


    Note : My code is implemented in c++

    


  • Saving Uncompressed Video Files using OpenCv, Gstreamer, and/or FFMPEG ?

    21 septembre 2022, par adav0033

    I have been trying to implement the cv::VideoWriter function from OpenCV to generate a an uncompressed video file. I started this because of a statement within the OpenCV Documentation which I will link here along with the statement.

    


    cv::VideoWriter::VideoWriter    (   const String &  filename,
int     fourcc,
double  fps,
Size    frameSize,
bool    isColor = true 
)       


    


    "If FFMPEG is enabled, using codec=0 ; fps=0 ; you can create an uncompressed (raw) video file."

    


    Ref. https://docs.opencv.org/3.4/dd/d9e/classcv_1_1VideoWriter.html

    


    However whilst troubleshooting the function I came across the refuting statement,

    


    " VideoCapture and VideoWriter do not provide interface to access raw compressed video stream, except maybe MJPEG in some cases.
Make sure you actually use FFmpeg backend by setting apiPreference parameter : VideoWriter("outfile.avi", cv2.CAP_FFMPEG, ...)"

    


    Ref. https://github.com/opencv/opencv/issues/14573

    


    I am now confused about how I go about writing the cv::VideoWriter function to satisfy the requirements to create an uncompressed video file (.avi) and if it is even possible. If it is not possible how do I achieve the outcome of saving an raw uncompressed video file, as I assume it would use some combination of FFMPEG, OpenCV,or Gstreamer.

    


    Note : My code is implemented in c++

    


  • How to Add Gstreamer Plugin on Mac when installed from Tutorials

    31 juillet 2014, par Dave Collins

    I basically have two installs of gstreamer on my Mac OS X machine :
    The one that works perfectly was installed following this tutorial (http://docs.gstreamer.com/display/GstSDK/Installing+on+Mac+OS+X) and downloading and installing the Developer SDK and using XCode. All tutorials work well.

    I also have a local version installed with Homebrew but video playback does not work on that version (see SO : gstreamer gst-launch sample mac osx plays audio but not video)

    SO, I’m trying to install the FFMPEG plugin into the working xcode dev system so that I can use FFDEC_H263 in a project.

    I tried simply copying the related .SO files (e.g. libgstffmpg.so) from the homebrew (cellar) location to the

     /Library/Frameworks/GStreamer.Framework/Versions/0.10/lib/gstreamer-0.10/

    directory and changing permissions. However, that gives me a "Caught a segmentation fault while loading plugin file" error when building any code.

    I also noticed that in the Xcode directory mentioned above, all of the plugins have a related .a and .la files in the \static subdirectory... Those same files don’t exist in the homebrew version.

    So, what is the proper way to install a plugin when you’ve started with the developer SDK for Mac OSX ?

Navigation