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Médias (21)

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  • 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

  • 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" ;

  • 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 (...)

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  • MPEG DASH : frame seeking

    13 août 2014, par bisc8

    TL ;DR : Is it possible to achieve frame seeking using DASH ? How ?

    I’m using ffmpeg to create non-multiplexed content :

    ffmpeg -y -an -codec:v libx264 -profile:v baseline output_video.mp4 -i video.mp4
    
ffmpeg -y -vn -codec:a libvo_aacenc -ac 1 -ar 44100 output_audio.mp4 -i video.mp4

    Then I’m using mp4box to create DASH content :

    mp4box -dash 10000 -frag 1000 -rap -dash-profile live -segment-name mp4-live-$RepresentationID$-$Number$ -out manifest.mpd output_video.mp4 output_audio.mp4

    Finally I open the generated content with Chrome, using dash.js. Everything works fine except that I can’t do frame seek. I keep on adding (1/frame_rate) seconds to the current time but nothing happens, the frame only changes after 10 seconds.

    I suppose this has to do with the video’s key interval. However, I am able to do frame seek after the ffmpeg part, so I guess I’m missing something in the mp4box command.

    Is it possible to achieve frame seeking using DASH or am I missing something ?

    Thanks in advance.

  • HLS to MPEG DASH

    15 avril 2018, par Maximilian

    Im currently working on a platform that relies on MPEG Dash to deliver audio and video to the browser.
    For onDemand im using ffmpeg to encode videos to h264/aac and MP4Box to create the manifest.mpd file.
    Now im trying to figure out how to create live MPEG Dash streams, more specifically encode hls live streams to MPEG Dash.

    1. Do i need to reencode all the .ts segments to .mp4(h264/aac) segments, since chrome doesnt support mpeg2ts ?
    2. If so, how do i continuously reencode all the segments (different resolution, different bitrates)
    3. How do i create a dynamic manifest with MP4Box / how would the input parameter look like

  • HLS to MPEG DASH

    28 avril 2017, par Maximilian

    Im currently working on a platform that relies on MPEG Dash to deliver audio and video to the browser.
    For onDemand im using ffmpeg to encode videos to h264/aac and MP4Box to create the manifest.mpd file.
    Now im trying to figure out how to create live MPEG Dash streams, more specifically encode hls live streams to MPEG Dash.

    1. Do i need to reencode all the .ts segments to .mp4(h264/aac) segments, since chrome doesnt support mpeg2ts ?
    2. If so, how do i continuously reencode all the segments (different resolution, different bitrates)
    3. How do i create a dynamic manifest with MP4Box / how would the input parameter look like

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