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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (83)
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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 (...) -
MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
La gestion des forums
3 novembre 2011, parSi les forums sont activés sur le site, les administrateurs ont la possibilité de les gérer depuis l’interface d’administration ou depuis l’article même dans le bloc de modification de l’article qui se trouve dans la navigation de la page.
Accès à l’interface de modération des messages
Lorsqu’il est identifié sur le site, l’administrateur peut procéder de deux manières pour gérer les forums.
S’il souhaite modifier (modérer, déclarer comme SPAM un message) les forums d’un article particulier, il a à sa (...)
Sur d’autres sites (11704)
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Generating synthetic testsrc video counting at 10 fps, first frame is duplicated
19 février 2020, par RotemI am trying to generate synthetic video using FFmpeg.
I want the frame rate to be 10 fps, and I want
testsrc
counter to advance every frame.Problem :
When the output file ismp4
, the first video frame is duplicated 10 times.Question :
Is it a bug in FFmpeg, or a problem in the command line arguments ?
I am using the following command :
ffmpeg -y -r 10 -f lavfi -i testsrc=duration=10:size=192x108:rate=1 -c:v libx264 vid.mp4
- The reason for setting
rate=1
is for the counter to advance on each frame.
The generated source pattern is designed to advance the counter every second. - The reason for setting
-r 10
before the input, is for "remuxing" the video at 10 fps, and ignoring the timestamps of the input.
I found the syntax in the following post : Using ffmpeg to change framerate :
Remux with new framerate
ffmpeg -y -r 24 -i seeing_noaudio.h264 -c copy seeing.mp4
When the output file is
AVI
it’s working correctly (first frame is not duplicated) :ffmpeg -y -r 10 -f lavfi -i testsrc=duration=10:size=192x108:rate=1 -c:v libx264 vid.avi
When generating
AVI
at 1 fps, and Remux tomp4
at 10 fps, there is a different problem :
The first and second frames are duplicated twice, and the last frame is missing.
Here are the commands :ffmpeg -y -f lavfi -i testsrc=duration=10:size=92x54:rate=1 -c:v libx264 -r 1 vid.avi
ffmpeg -y -r 10 -i vid.avi -c:v copy -r 10 vid.mp4
Parsing the
mp4
video toPNG
images :ffmpeg -i vid.mp4 %02d.png
Result :
The first frame is duplicated 10 times.
Parsing the
AVI
video toPNG
images :
Result :
There are 10 frames as expected. - The reason for setting
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H264 HW Decoding on Android Using FFmpeg-10
21 septembre 2012, par limitfanI've noticed that ffmpeg has already included (libavcodec/libstagefright.cpp) and claimed to support H264's hardware decoding through StageFright framework. I've build the shared library according to (tools/build_libstagefright). But when doing real H264 frame decoding, it seems to be failed at Stagefright_init().
Does anybody succeed to use this new feature ? Thank you in advance. -
GStreamer on Android
9 décembre 2014, par DiscGolferCan anyone give me any tips on getting GStreamer to work on Android. I have never used it before and I would like to use it with FFmpeg (I already have FFmpeg compiled and works fine on Android). I would just like to use GStreamer to help with some of the processing as learning the FFmpeg API is somewhat of a nightmare haha. Thanks in advance for any help at all !