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Médias (1)
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Carte de Schillerkiez
13 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (70)
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Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...) -
Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ; -
Gestion de la ferme
2 mars 2010, parLa ferme est gérée dans son ensemble par des "super admins".
Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
Dans un premier temps il utilise le plugin "Gestion de mutualisation"
Sur d’autres sites (8595)
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FFmpeg- Concat videos with unknown resolution/frame size/rate etc
21 mars 2017, par Karandeep AtwalOn
android
platform, I am using this library for concatenating videos.
Formp4
files with Same Properties likeframe-size
,resolution
etc. I have succeeded concatenating by this command--f concat -safe 0 -i inputfile.txt -codec copy Outputfile
where
inputfile.txt
contains-file /storage/emulated/0/demo/vid1.mp4
file /storage/emulated/0/demo/vid2.mp4
file /storage/emulated/0/demo/vid3.mp4
file /storage/emulated/0/demo/vid4.mp4But, this command only works if input video files have SAME Properties eg. videos made from camera app.If we add other
mp4
videos to the input eg. Whatsapp Videos, then I gotcorrupted
Output. It is described here.I have read about Concat-Filter ,But this is not working in my case giving me errors like
Media-mismatch
asked here, differentSAR value
,frame-size
etc. doesn’t match. I also used this Command but it takes about three hours for25Mb
&5Mb
video.I want to choose as many random videos from storage and want to
concat
them. I also think of converting every chosen video to same bitrate, same frame size, same aspect ratio, but it is time-consuming.What would be the Best Way to Concat videos of unknown type using ffmpeg commands ?
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Error while trying to stream higer resolution using ffmpeg and jsmpeg
11 avril 2017, par trojekI try to do a prof of concept of streaming webcam in browser using jsmpeg. It works perfect when I use code from the documentation which is as follows :
ffmpeg \
-f v4l2 \
-framerate 25 -video_size 640x480 -i /dev/video0 \
-f mpegts \
-codec:v mpeg1video -s 640x480 -b:v 1000k -bf 0 \
http://localhost:8081/supersecretMy webcam supports resolutions, framerates and formats as in code below :
[video4linux2,v4l2 @ 0x2655360] Compressed: mjpeg : Motion-JPEG : 1920x1080 1280x720 1024x768 640x480 800x600 1280x1024 320x240
[video4linux2,v4l2 @ 0x2655360] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1280x720 1024x768 640x480 800x600 1280x1024 320x240While I change in above code the resolution from 640x480 to e.g. 1024x768, I get an error :
[mpeg1video @ 0x110f4e0] MPEG1/2 does not support 10/1 fps
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or heightI assume that camera driver change number of fps and MPEG1/2 doesn’t support that numer of fps.
Probably I get from camera raw data (yuyv422) and it can’t play it with higer framerate when e.f. 10 for 1024x768.
How Can I modify ffmped execution code in order to stream video in Full HD resulution ? -
using ffmpeg to record highest resolution offered by Facetime cameras (mac)
7 mai 2017, par user1361529I am using the following code successfully to record a video feed from my mac
./ffmpeg -f avfoundation -framerate 30 -i "default" out.mp4
This however seems to be recording video at the lowest resolution of
320x200
My camera supports the following resolutions :
[avfoundation @ 0x7ff7b2800000] Supported modes:
[avfoundation @ 0x7ff7b2800000] 1280x720@[1.000000 30.000000]fps
[avfoundation @ 0x7ff7b2800000] 640x480@[1.000000 30.000000]fps
[avfoundation @ 0x7ff7b2800000] 320x240@[1.000000 30.000000]fpsI tried manually specifying the resolution using both
-s
and-video_size
but that seems to just scale up the low res video.How do I get ffmpeg to pick my
1280x720
resolution ?thanks