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  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • 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 (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

Sur d’autres sites (7125)

  • Stream image sensor data as video in a Non-Live stream

    15 juillet 2020, par TheRuedi

    I have image sensor data (in my case in a ROS bag file), that means many single images that I have to stream to a webinterface. The goal is to simply have a video in the browser where I can select the time on the seek bar, that means I don't want a live stream.

    


    Live encoding and streaming with FFmpeg works.

    


    What is the best approach ? The total Content-Length is unkown, since it is on-the-fly encoding, so I don't know how to implement 206 Partial Content where I send a Content-Range. Even if this was working, I need to encode valid partial content with FFmpeg.

    


  • How to get Updated Shared Object Files of OpenCV and FFMPEG libraries to overcome Libpng vulnerability ? [duplicate]

    3 mars 2017, par Liya

    This question already has an answer here :

    We seek a technical help on a current issue which we are facing with one of our android application.

    Our application is for live video streaming and recording (both audio and video) using wifi camera . We have completed the development process and every functionality of the application is working as expected in current version. but once we tried to upload the application to Google has rejected the application stating that vulnerability issue with Libpng library version.

    Our application uses OpenCV, FFMPEG, JavaCV and JavaCPP libraries for Image processing for Video generation. But when we tried to upload to play store google have rejected application with following message :

    “ Hello Google Play Developer,

    We rejected Application name, for violating our Malicious Behavior or
    User Data policy. If you submitted an update, the previous version of
    your app is still available on Google Play.

    This app uses software that contains security vulnerabilities for
    users or allows the collection of user data without proper disclosure.

    Below is the list of issues and the corresponding APK versions that
    were detected in your recent submission. Please upgrade your app(s) as
    soon as possible and increment the version number of the upgraded APK.

    Vulnerability APK Version(s) Libpng library

    The vulnerabilities were fixed in libpng v1.0.66, v.1.2.56, v.1.4.19,
    v1.5.26 or higher. You can find more information about how resolve the
    issue in this Google Help Center article.”

    Since we have not used libpng library directly in our application we assume the problem is with opencv lib version which may be using libpng , so we replaced the opencv jar file with its gradle dependency and .so files of different libraries are combined in an armeabi.jar file and once we deleted the .so files from libs/armeabi.jar folder and uploaded to play store, then Google didn’t rejected with vulnerability issue and it got uploaded to the play store but the recording isn’t working in that version because we have removed the .SO files from the Project.

    So as per our assumptions the libpng vulnerability is not only due to opencv but also due to the other libraries or the .so files .So please kindly suggest us which all .SO files we can remove from the library , so our application functionality for video recording works properly .

    We tried to update the OpenCV, FFMPEG libraries and since the SO files are not getting regenerated so could not resolve this issue yet

    We already refer following links to find a solution :

    1. libpng-vulnerability

    2. opencv-in-android

    3. FFmpegAndroid

    For more information please read our stackover flow post regarding this issue :Libpng vulnerability

    We need help to solve this issue. Please let us know if you can help us to solve this issue since we are running out of time.

    PS : These are the assumptions we made on this issue, May be we are wrong , so please guide us to the right path so we can achieve our goal.

  • Revision 192 : Edited wiki page through web user interface.

    11 mai 2010, par marc.noirot

    Changed Paths :
     Modify /wiki/CheckMessages.wiki



    Edited wiki page through web user interface.

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