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  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Possibilité de déploiement en ferme

    12 avril 2011, par

    MediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
    Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)

Sur d’autres sites (11231)

  • minimum delay for mpeg-dash stream using ffmpeg

    9 février 2017, par evan

    I am trying to stream my video files using MP4Box and ffmpeg and using mpeg-dash, I transcoded my video using this command for video :

    ffmpeg -i main720.MTS -movflags faststart -vcodec libx264 -r 24 -tune zerolatency -tune fastdecode -bf 0 -slices 0 -x264opts intra_refresh=1 -g 96 -b:v 700k -maxrate 700k -bufsize 400k -an -s 640*360 -ss 00:00:00 -t 00:02:00 main720_700_video.mp4

    and this for audio :

    ffmpeg -i main720.MTS -movflags faststart -acodec libmp3lame -b:a 128k -vn -ss 00:00:00 -t 00:02:00 main720_700_audio.mp4

    and this to make the mpeg-dash file :

    MP4Box -dash 4000 -frag 4000 -profile onDamand -rap -segment-name %s_ -out manifest.mpd main720_300_video.mp4 main720_700_video.mp4 main720_300_audio.mp4

    but I am NOT getting a fast stream and it has got some delay, any suggestions on how to make this delay lower ??

  • MPEG-DASH not working. MPD validation fails

    16 novembre 2017, par Marko36

    I am trying to serve video using MPEG-DASH. No success. I have tried the following :

    Following the instructions on webproject.org, using FFMPEG, I have created several variants of the original video and the DASH MPD manifest, containing metadata. However, the manifest does not validate using http://dashif.org/conformance.html. This validator itself is quite useless, as it provides unusable info about the error. I have found in a post from 2014, that one of the errors generated by FFMPEG is capital letters in some metadata (not a critical one, but could have been fixed for years !). Other errors detected, but not described. No tangible info from any of these other validators either : http://www-itec.uni-klu.ac.at/dash/?page_id=605 (produces rubbish info), https://github.com/Eyevinn/dash-validator-js (throws an exception)

    Following instructions on mozilla.org, produces the same non-working result, as the instructions are nearly identical (including same resolution*bitrate sets), except that Mozilla omits the use of dash.js, which is deemed necessary by the rest of the internet.

    This guide on Bitmovin, utilizing x264 and MP4Box does not work either. Going by the instructions, I have to recode the original x264 video twice. The final version of videos are in some cases twice the size of their intermediate versions and 720p video is actually larger than its 1080p, higher bitrate counterpart. No need to go further. (Yet, this is the only way that actually produced segments..)

    I have spent 3 days on the above, read about all there is on the web from the other frustrated adopters, and ran out of options. I would really apreciate some pro tips ! Thanks !

  • Does not work -hls_playlist in ffmpeg in the -dash section

    18 mars 2019, par jidckii

    I will use this assembly ffmpeg
    https://hub.docker.com/r/jrottenberg/ffmpeg/

    ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
    
built with gcc 6.2.1 (Alpine 6.2.1) 20160822  

    I’m trying to do dash and hls at the same time.

    In the documentation from here http://ffmpeg.org/ffmpeg-all.html#dash-2

    the key is :

    -hls_playlist hls_playlist
    

    
Generate HLS playlist files as well. The master playlist is generated
    
with the filename master.m3u8. One media playlist file is generated for
    
each stream with filenames media_0.m3u8, media_1.m3u8, etc.

    those. mpd and m3u8 must be created at the same time.

    Running :

    ffmpeg -re \
    
-analyzeduration 20000000 \
    
-i udp: //239.0.0.1: 1234? overrun_nonfatal = 1 \
    
-map 0 \
    
-c copy \
    
-f dash \
    
-min_seg_duration 5000000 \
    
-window_size 10 \
    
-extra_window_size 10 \
    
-remove_at_exit 1 \
    
-hls_playlist 1 \
    
-use_timeline 1 \
    
-use_template 1 \
    
-vtag avc1 \
    
-atag mp4a \
    
cam01.mpd

    and get an error :

    Unrecognized option 'hls_playlist'.  
    
Error splitting the argument list: Option not found`

    without the -hls_playlist
    everything works correctly ...

    What could be the problem ?

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