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Médias (1)
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (90)
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L’utiliser, en parler, le critiquer
10 avril 2011La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
Une liste de discussion est disponible pour tout échange entre utilisateurs. -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Mediabox : ouvrir les images dans l’espace maximal pour l’utilisateur
8 février 2011, parLa visualisation des images est restreinte par la largeur accordée par le design du site (dépendant du thème utilisé). Elles sont donc visibles sous un format réduit. Afin de profiter de l’ensemble de la place disponible sur l’écran de l’utilisateur, il est possible d’ajouter une fonctionnalité d’affichage de l’image dans une boite multimedia apparaissant au dessus du reste du contenu.
Pour ce faire il est nécessaire d’installer le plugin "Mediabox".
Configuration de la boite multimédia
Dès (...)
Sur d’autres sites (10007)
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avcodec/dvdsubdec, dvbsubdec : remove bitmap dumping in DEBUG builds
28 mai 2022, par softworkzavcodec/dvdsubdec, dvbsubdec : remove bitmap dumping in DEBUG builds
It's been a regular annoyance and often undesired.
There will be a subtitle filter which allows to dump individual
subtitle bitmaps.Signed-off-by : softworkz <softworkz@hotmail.com>
Signed-off-by : Marton Balint <cus@passwd.hu> -
Merging input Streams with nodejs/ffmpeg
14 septembre 2020, par jAndyI'm creating a very basic and rudimentary Video-Web-Chat. On the client side, I'm going to use a simple
getUserMedia
API call to capture the webcam data and send video-data asdata-blob
to my server.

From There, I'm planning to either use the
fluent-ffmpeg
library or just spawnffmpeg
myself and pipe that raw data toffmpeg
, which in turn, does some magic and pushes that out asHLS
stream to an Amazon AWS Service (for instance), which then gets actually displayed on a Web Browser for all participating people in the video chat.

So far, I think all of this should be fairly easy to implement, but I keep my head spinning around the question, how I can create a "combined" or "merged" frame and stream, so the output HLS data from my server to the distributing cloud service has only to be one combined data stream to receive.


If there are 3 people in that video chat, my server receives 3 data streams from those clients and combines these data streams (from the individual web-cam data sources) into one output stream.


How could that be accomplished ?
Can I "create" a new frame with
ffmpeg
, so to speak ? I would be very thankful if anybody could give me a heads up here, maybe I'm thinking in a complete wrong direction.

Another question which arises to me is, if I really can just "dump" any data, which I'm receiving from a binary blob created from
getUserMedia
orMultiStreamRecorder
toffmpeg
or if I have to specify somewhere and somehow the exact codecs being used etc.?

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output of ffmpeg comes out like yamborghini high music video
19 janvier, par chipI do this procedure when I edit a long video


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- segment to 3 second videos, so I come up with a lot of short videos
- I randomly pick videos and put them in a list
- then I join these short videos together using concat
- now I get a long video again. next thing I do is segment the video 4 minute videos










After processing, the videos look messed up. I don't know how to describe it but it looks like the music video yamborghini high


For some reason, this only happens to videos I capture at night. I do the same process for day time footage, no problem.


is there a problem with slicing, merging and then slicing again ?


or is it an issue that I run multiple ffmpeg scripts at the same time ?


here's the script


for FILE in *.mp4; do ffmpeg -i ${FILE} -vcodec copy -f segment -segment_time 00:10 -reset_timestamps 1 "part_$( date '+%F%H%M%S' )_%02d.mp4"; rm -rf $FILE; done; echo 'slicing completed.' && \ 
for f in part_*[13579].mp4; do echo "file '$f'" >> mylist.txt; done
ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4 && echo 'done merging.' && \ 
ffmpeg -i output.mp4 -threads 7 -vcodec copy -f segment -segment_time 04:00 -reset_timestamps 1 "Video_Title_$( date '+%F%H%M%S' ).mp4" && echo 'individual videos created'