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Autres articles (39)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (4216)

  • FFMPEG : Position images in video when creating slide show

    29 décembre 2015, par Jimmy

    I’m using FFMPEG shell utility in an Android app to convert users pictures to video, here’s an example command :

    cat *.jpg | ffmpeg -f image2pipe -r 10  -vcodec mjpeg -i - -vcodec libx264 -s 1280x720 -preset ultrafast slideshow.mp4

    I used to crop images when the user import it in the app but now I would like to allow the user to reposition the image later, here’s an example :

    enter image description here

    So the user could drag or zoom the image to position it in the clear area (video ratio).

    So using the ffmpeg shell command can I specify the image coordinate for each image and position the image in the video.

  • Modifying CISCO openh264 to take image frames and out compressed frames

    16 mai 2017, par Khurram Amin

    Has anyone tried to modify the CISCO openh264 library to take JPEG images as input and compress them into P and I frames (output as frames, NOT video) and similarly to modify decoder to take compressed P and I frames and generate uncompressed-frames ?

    I have a camera looking at a static scene and taking pictures (1280x720p) every 30 second. The scene is almost static. Currenlty I am using JPEG compression to compress each frame individually and it is resulting in an image size of 270KB. This compressed frame is transferred via internet to a storage server. Since there is very little motion in the scene, the ’I’ frame size will be very small (I think it should be 20-50KB). So it will be very cost effective to transmit I frames over internet instead of JPEG images.

    Can anyone guide me to some project or about how to proceed with this task ?

  • Modifying CISCO openh264 to take image frames and out compressed frames

    16 mai 2017, par Khurram Amin

    Has anyone tried to modify the CISCO openh264 library to take JPEG images as input and compress them into P and I frames (output as frames, NOT video) and similarly to modify decoder to take compressed P and I frames and generate uncompressed-frames ?

    I have a camera looking at a static scene and taking pictures (1280x720p) every 30 second. The scene is almost static. Currenlty I am using JPEG compression to compress each frame individually and it is resulting in an image size of 270KB. This compressed frame is transferred via internet to a storage server. Since there is very little motion in the scene, the ’I’ frame size will be very small (I think it should be 20-50KB). So it will be very cost effective to transmit I frames over internet instead of JPEG images.

    Can anyone guide me to some project or about how to proceed with this task ?

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