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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (97)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 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 (...) -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
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Publier sur MédiaSpip
13 juin 2013Puis-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
Sur d’autres sites (10316)
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FFPlay : How to manually select video quality during playing the mpd stream ?
19 août 2023, par Brian_wuI used ffplay to play mpd stream and successed,


Here the MPD file :


<?xml version="1.0" encoding="utf-8"?>
<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT1M8.7S" maxsegmentduration="PT5.0S" minbuffertime="PT12.5S">
 <programinformation>
 </programinformation>
 <servicedescription>
 </servicedescription>
 <period start="PT0.0S">
 <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="24000/1001" maxwidth="1280" maxheight="720" par="16:9">
 <representation mimetype="video/mp4" codecs="avc1.4d401f" bandwidth="10237" width="480" height="270" sar="1:1">
 <segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="150150" r="9"></s>
 <s d="149149"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 <representation mimetype="video/mp4" codecs="avc1.4d401f" bandwidth="60882" width="1280" height="720" sar="1:1">
 <segmenttemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="150150" r="9"></s>
 <s d="149149"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true" lang="und">
 <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="128000" audiosamplingrate="32000">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
 <segmenttemplate timescale="32000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="159744"></s>
 <s d="160768" r="11"></s>
 <s d="111915"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="128000" audiosamplingrate="44100">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
 <segmenttemplate timescale="44100" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="220160"></s>
 <s d="221184" r="11"></s>
 <s d="158713"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
</period>
</mpd>


this dash stream contains 2 vindeos(480P and 720P), and 2 audios.The videos always starts low quality(480P), I want to change the video resolution to the high quality(720P) during playing process, what should i do ?


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Map the second stream when the first stream ends in FFMPEG
20 août 2021, par CencodeI have three ffmpeg commands. First one is used to stream a video.


ffmpeg -re -i /home/Channel/1.mp4 -f mpegts "udp://236.2.2.4:2000"


Second stream will send a looping image.


ffmpeg -loop 1 -i /home/Channel/black.png -c:v libx264 -tune stillimage -shortest -f mpegts "udp://236.2.2.4:2001"


I have a third ffmpeg command to map the above two streams and select a one for the output.


ffmpeg -i "udp://236.2.2.4:2000" -i "udp://236.2.2.4:2001" -map 0 -map 1 -f mpegts "udp://236.1.1.4:2000"


From this ffmpeg command first stream will be played.
Will it be possible to chose the second stream automatically once the first stream is finished ?


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Why does -force_key_frames add VOP start_codes ? (ffmpeg)
11 août 2021, par Tobias S.I am trying to understand this project on Github https://github.com/CrushedPixel/moshpit


In one file an mp4-file is converted to AVI with this ffmpeg command (resulting codec is mpeg4) :


ffmpeg -i .\mosh.mp4 -an -q 31 -g 1294967295 -strict experimental -force_key_frames "expr:+eq(n,50)" test_force.avi


Afterwards I want to find VideoObjectPlanes (VOP) in the file. According to the mpeg4 standard (p. 31) they have the start_code

0x0001B6. In my example file this occurs 518 times.

Now if I run the same command but without
-force_key_frames "expr:+eq(n,50)"there are no more occurences of0x0001B6.

Why does adding
force_key_frameschange the output file so significantly ? Is it possible to have an mpeg4 video without VideoObjectPlanes or are the start_codes simply missing ?

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