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Médias (1)
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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (42)
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Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
12 avril 2011, parLa manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras. -
Gestion générale des documents
13 mai 2011, parMédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...) -
Use, discuss, criticize
13 avril 2011, parTalk 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 (5416)
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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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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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ffmpeg normalized mp3 audio and album art went missing
29 août 2022, par SomeoneInNeedOfHelpI used below ffmpeg command to normalized audio of my songs and the album art is missing after running below command


ffmpeg -i "Original.mp3" -af loudnorm=I=-18:LRA=4:TP=-1 -ar 44100 -map 0:v -b:a 192k "Normalized.mp3"


ffprobe Original.mp3


Input #0, mp3, from 'Original.mp3':
 Metadata:
 encoded_by : Switch Free Home Version © NCH Software
 comment :
 disc : 1
 track : 0
 album_artist : Artist
 genre : Pop
 artist : Artist
 title : Song Title
 album : Song album
 date : 2001
 Duration: 00:04:15.91, start: 0.000000, bitrate: 200 kb/s
 Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 192 kb/s
 Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 1279x1280 [SAR 96:96 DAR 1279:1280], 90k tbr, 90k tbn, 90k tbc (attached pic)
 Metadata:
 title : thumbnail
 comment : Cover (front)


ffprobe Normalized.mp3


Input #0, mp3, from 'Original.mp3':
 Metadata:
 encoded_by : Switch Free Home Version © NCH Software
 comment :
 disc : 1
 track : 0
 album_artist : Artist
 genre : Pop
 artist : Artist
 title : Song Title
 album : Song album
 date : 2001
 encoder : Lavf58.67.100
Duration: 00:04:15.92, start: 0.025056, bitrate: 265 kb/s
 Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 192 kb/s
 Metadata:
 encoder : Lavc58.12
 Stream #0:1: Video: png, rgb24(pc), 1279x1280 [SAR 1:1 DAR 1279:1280], 90k tbr, 90k tbn, 90k tbc (attached pic)
 Metadata:
 title : thumbnail
 comment : Cover (front)


How can I keep the album art from the source file ?


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