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Autres articles (31)

  • Encodage et transformation en formats lisibles sur Internet

    10 avril 2011

    MediaSPIP transforme et ré-encode les documents mis en ligne afin de les rendre lisibles sur Internet et automatiquement utilisables sans intervention du créateur de contenu.
    Les vidéos sont automatiquement encodées dans les formats supportés par HTML5 : MP4, Ogv et WebM. La version "MP4" est également utilisée pour le lecteur flash de secours nécessaire aux anciens navigateurs.
    Les documents audios sont également ré-encodés dans les deux formats utilisables par HTML5 :MP3 et Ogg. La version "MP3" (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (4046)

  • libavcodec : add a new AV_CODEC_EXPORT_DATA_FILM_GRAIN flag and option

    12 novembre 2020, par Lynne
    libavcodec : add a new AV_CODEC_EXPORT_DATA_FILM_GRAIN flag and option

    This introduces a new field to allow decoders to export their film grain
    
parameters.
    
Will be used by the next patch.
    • [DH] doc/APIchanges
    • [DH] libavcodec/avcodec.h
    • [DH] libavcodec/options_table.h

  • FFMPEG Dash with tiles of thumbnail images

    31 juillet 2020, par martyn Gilbert

    As of DASH-IF IOP version 4.2, section 6.2.6 defines the notion of image-based tracks in DASH :
https://dashif.org/docs/DASH-IF-IOP-v4.3.pdf.

    



    This is the ability to have an adaption set made up of mime type images that themselves are a strip of low resolution thumbnails. 
A player will use these thumbnails when the user hovers their mouse over the video timeline and get a 
preview of the the frame at that approximate timecode.

    



    Theo player website has a page dedicated to this function for playback :
https://www.theoplayer.com/blog/in-stream-thumbnail-support-dvr-dash-streams

    



    I need to generate a dash stream (not live) using ffmpeg that also contains these thumbnails. 
I already have an ffmpeg command that will generate the film strip of jpgs which outputs a thumbnail every 5 seconds of input video and joins 5 of these together in a single jpg :

    



    ffmpeg -i INPUT -q:v 20 -vf "select=not(mod(n\,125)),scale=480:270,tile=5x1" -vsync vfr output%d.jpg

    



    and the mpeg dash itself :

    



    ffmpeg -i INPUT -y -map 0 -acodec aac -ac 2 -ar 48000 -s 960x540 -vcodec libx264 -f dash -preset veryfast -b:v:2 1500k -seg_duration 2 output.mpd

    



    But I cannot find a way in ffmpeg to include the thumbnails in the dash mpd file.

    


  • OpenCV 3.2 + Python 2.7 + Windows 7 GETTING STARTED

    8 mai 2017, par Arantxa

    I’m having several problems to start working with OpenCV and Python in a Windows environment.

    After doing many of the instructions given on the internet, I haven’t found the correct way yet.

    I was wondering to use Highgui in order to do image processing. But after opening the camera, the frame is totally black, I tried to put the ffmpeg codecs correctly but it looks like it wasnt because of that, so I tried to save a frame just to see if the frame was totally empty too, and I can’t use cv2.SaveImage() method, because, as it says, ’module’ object has no attribute ’SaveImage’

    I have tried to :

    • Install it with Anaconda. After no success...I
    • Install OpenCV from Sourceforge, and after that copy the cv2.pyd file inside Pyton27/Lib/site-packages/
    • Install the next packages from Python oficial page :
      • opencv-python
      • opencv-contrib-python

    How do you use OpenCV with Python ?

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