Recherche avancée

Médias (2)

Mot : - Tags -/doc2img

Autres articles (100)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

Sur d’autres sites (14192)

  • webm dash encoding... What are the correct ffmpeg parameters ?

    24 avril 2020, par Dean

    I'm stumped with encoding videos into a dash compliant format. I'm going from .mp4 to .webm

    



    Firstly, I am running OS X and ffmpeg 2.5.4.

    



    Here's the encoding commands I am using in my test (I got these from here) :

    



    ffmpeg -i IMG_0113.mp4 -c:v libvpx-vp9 -s 160x90 -b:v 25k -g 1 -tile-columns 4 -frame-parallel 1 -an -f webm -dash 1 video_160x90_25k.webm

ffmpeg -i IMG_0113.mp4 -c:v libvpx-vp9 -s 160x90 -b:v 50k -g 1 -tile-columns 4 -frame-parallel 1 -an -f webm -dash 1 video_160x90_50k.webm

ffmpeg -i IMG_0113.mp4 -vn -acodec libvorbis -ab 128k  -dash 1 audio_128k.webm

ffmpeg -f webm_dash_manifest -i video_160x90_25k.webm -f webm_dash_manifest -i video_160x90_50k.webm -f webm_dash_manifest -i audio_128k.webm -c copy -map 0 -map 1 -map 2 -f webm_dash_manifest -adaptation_sets "id=0,streams=0,1 id=1,streams=2" manifest.mpd


    



    Secondly, the problem is not with my server, as I have downloaded the samples from here, and they work 100% on the dash.js player when served from my local server.

    



    Please could someone out there point me in the right direction ? Or provide a sample of the ffmpeg commands used to get the output format correct.

    



    Thanks,
Dean.

    


  • webm dash encoding... What are the correct ffmpeg parameters ?

    4 septembre 2015, par DeanL

    I’m stumped with encoding videos into a dash compliant format. I’m going from .mp4 to .webm

    Firstly, I am running OS X and ffmpeg 2.5.4.

    Here’s the encoding commands I am using in my test (I got these from here) :

    ffmpeg -i IMG_0113.mp4 -c:v libvpx-vp9 -s 160x90 -b:v 25k -g 1 -tile-columns 4 -frame-parallel 1 -an -f webm -dash 1 video_160x90_25k.webm
    

    
ffmpeg -i IMG_0113.mp4 -c:v libvpx-vp9 -s 160x90 -b:v 50k -g 1 -tile-columns 4 -frame-parallel 1 -an -f webm -dash 1 video_160x90_50k.webm
    

    
ffmpeg -i IMG_0113.mp4 -vn -acodec libvorbis -ab 128k  -dash 1 audio_128k.webm
    

    
ffmpeg -f webm_dash_manifest -i video_160x90_25k.webm -f webm_dash_manifest -i video_160x90_50k.webm -f webm_dash_manifest -i audio_128k.webm -c copy -map 0 -map 1 -map 2 -f webm_dash_manifest -adaptation_sets "id=0,streams=0,1 id=1,streams=2" manifest.mpd

    Secondly, the problem is not with my server, as I have downloaded the samples from here, and they work 100% on the dash.js player when served from my local server.

    Please could someone out there point me in the right direction ? Or provide a sample of the ffmpeg commands used to get the output format correct.

    Thanks,
    Dean.

  • Create MPEG-DASH Initialization segment

    5 janvier 2016, par Mahout

    I am looking to convert between HLS and MPEG Dash. I do not access to the original fully concatenated video file, only the individual HLS segments.

    In doing this transformation to MPEG Dash I need to supply an initialziation segment for the Dash manifest .mpd file.

    My questions are :

    1. What is the structure of a Dash video initialization segment ?
    2. How can I generate/create one without the need for the original full file ?

    Perhaps a solution would involve getting MP4Box to convert the ’.ts’ HLS segments to Dash ’.m4s’ segments which are self initializing, but I am unsure how to go about this this ?

    Any ideas are much appreciated.

    Many thanks.

    UPDATE :
    Snippet to stream using original hls segments. Video plays all the way through but is just black.

      <representation width="426" height="238" framerate="25" bandwidth="400000">
    
    <segmentlist timescale="25000" duration="112500">
    
           <segmenturl media="video_0_400000/hls/segment_0.ts"></segmenturl>
    
           <segmenturl media="video_0_400000/hls/segment_1.ts"></segmenturl>
    
          <segmenturl media="video_0_400000/hls/segment_2.ts"></segmenturl>
    
    </segmentlist>
    
   </representation>

Navigation