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Médias (1)
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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 (82)
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Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
MediaSPIP en mode privé (Intranet)
17 septembre 2013, parÀ partir de la version 0.3, un canal de MediaSPIP peut devenir privé, bloqué à toute personne non identifiée grâce au plugin "Intranet/extranet".
Le plugin Intranet/extranet, lorsqu’il est activé, permet de bloquer l’accès au canal à tout visiteur non identifié, l’empêchant d’accéder au contenu en le redirigeant systématiquement vers le formulaire d’identification.
Ce système peut être particulièrement utile pour certaines utilisations comme : Atelier de travail avec des enfants dont le contenu ne doit pas (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, 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 (...)
Sur d’autres sites (9597)
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Add Win32 GDI-based screen grabbing
2 avril 2014, par Calvin WaltonAdd Win32 GDI-based screen grabbing
Based on original code by Christophe Gisquet in 2010, updated to work
with current ffmpeg APIs.Supports grabbing a single window or an area of the screen, including
support for multiple monitors (Windows does funky stuff with negative
coordinates here).I’ve moved most of the configuration to AVOptions ; the input file name
is now only the string "desktop", or "title=<windowname>" to select a
single window. The AVOptions are the same as x11grab where possible.Code has been added to support a "show_region" mode, like x11grab, which
will draw a rectangle on the screen around the area being captured.Instead of duplicating code for paletted image handling, I make use of
the GDI API’s ability to output DIB (BMP) images, which can be run
through ffmpeg’s existing BMP decoder.Signed-off-by : Calvin Walton <calvin.walton@kepstin.ca>
Signed-off-by : Michael Niedermayer <michaelni@gmx.at> -
JavaCV FFmpegFrameRecorder properties explanation needed
29 décembre 2014, par LeronI’m using
FFmpegFrameRecorder
to get the video input from my webcam and record it into a video file. The problem is that I’m building my application using a few different demo source codes that I found and I use properties some of which are not completely clear to me.First, here is my code snippet :
FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(FILENAME, grabber.getImageWidth(),grabber.getImageHeight());
recorder.setVideoCodec(13);
recorder.setFormat("mp4");
recorder.setPixelFormat(avutil.PIX_FMT_YUV420P);
recorder.setFrameRate(30);
recorder.setVideoBitrate(10 * 1024 * 1024);
recorder.start();- setVideoCodec(13) - What is the meaning of this
(13)
how can I understand what actual codec stands behind any number ? - setPixelFormat - Just get this, don’t know what it’s doing in general
- setFrameRate(30) - I think this should be pretty clear but still what is the logic behind what frame rate we choose (isn’t the high the better ?)
- setVideoBitrate(10*1024*1024) - again almost no idea what this does and what’s the logic behind the numbers ?
At the end I just want to mention one last problem that I get recording video like this. If the actual length of the video is let’s say 20secs. When I play the video file created from the program it runs significantly faster. Can’t tell if it’s exactly 2 times faster than it should be but in general if I record a 20sec video then it’s played for about 10secs. What may cause this and how can I fix it ?
- setVideoCodec(13) - What is the meaning of this
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Configure ffmpeg for wowza and wp8
11 octobre 2013, par Anton ShakaloI have mp4 file from my windows phone.
There is info :
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42
Video
Format : AVC
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Audio
Format : AAC
Format profile : LC
Codec ID : 40
Bit rate : 96.0 Kbps
Sampling rate : 44.1 KHzWhen I stream it to wowza with next ffmpeg command ( I got it from documentation)
ffmpeg -re -i "C:\sample2.mp4" -vcodec libx264 -vb 150000 -g 60 -vprofile main -level 2.1 -acodec aac -ab 64000 -ar 48000 -ac 2 -vbsf h264_mp4toannexb -f mpegts udp://127.0.0.1:10001?pkt_size=1316
In client app I see corrupted video : http://i.imgur.com/fKEMlsB.png
With sample file provided by wowza streamed video looks fine.
There is info about sample file from wowza :
General
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt
Video
Format : AVC
Format profile : Baseline@L3.0
Codec ID : avc1
Audio
Format : AAC
Format profile : LC
Codec ID : 40Can you help me with ffmpeg configuring ?
I read documentation, but understand nothing.