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Autres articles (25)

  • La sauvegarde automatique de canaux SPIP

    1er avril 2010, par

    Dans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
    Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
    Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
    La documentation de l’utilisation du script d’installation (...)

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

Sur d’autres sites (5071)

  • Adds support for setting aq_mode in libvpx encoder

    26 août 2014, par Deb Mukherjee
    Adds support for setting aq_mode in libvpx encoder

    Reviewed-by : James Zern <jzern@google.com>
    
Signed-off-by : James Almer <jamrial@gmail.com>
    • [DH] doc/encoders.texi
    • [DH] libavcodec/libvpxenc.c

  • avcodec/refstruct : Inline ff_refstruct_allocz()

    8 octobre 2023, par Andreas Rheinhardt
    avcodec/refstruct : Inline ff_refstruct_allocz()

    Suggested by James Almer.
    

    Reviewed-by : James Almer <jamrial@gmail.com>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavcodec/refstruct.c
    • [DH] libavcodec/refstruct.h

  • How to run ffmpeg command in Java using Hoary JavaAV / Xuggler / Something else ?

    13 mars 2014, par Lane

    I have a Java FX application that needs to playback raw H264 videos. I have the RAW videos formatted appropriately so they can be opened directly in VLC (as long as they are in a file with a .h264 extension). I was looking into using VLCJ / Xuggler for my player, but I ran into many problems just getting a single player working on my Mac... so I have decided to stick with Java FX Media Player and go with another solution.

    A bit more background...

    I will be playing multiple videos at the same time and each video's source will come in 12 second chunks (i.e. I may need to play 5 minutes of footage, so each video will actually have 25 *.h264 files behind the scenes).

    I am able to encode these files one at a time using the command "ffmpeg -i videoN.h264 -i audioN.au outputN.mp4" (and that's if I want audio as well... otherwise I can omit the "-i audioN.au"). However, even with the option "-preset ultrafast", it takes 1/8 the length of the video to perform the encoding so I cannot encode ALL the videos upfront because in the 5 minute example above, for 3 videos... this would take just under 2 minutes to perform the encoding, which is an unacceptable delay.

    The solution I have in mind is to convert the 3 videos' first chunk ( 2 seconds) and return immediately after so the user can see the first 12 seconds, then run a background thread to convert the rest of the chunks in order, simulating "streaming video buffering" if you will.

    I want to use a library so when I deploy my application, I won't have to worry about different platforms, installing ffmpeg, environment variables, executing ffmpeg via command line, etc. It seems like both Xuggler, JavaAV and perhaps FFMPEG-Java should be able to accomplish this... but the examples I have seen seem to use these libraries in a live environment and perform the encoding one BufferedImage at a time.

    Questions...

    1. What library do you recommend to use (for performance and simplicity) or do you recommend I just run ffmpeg via command line and handle any installation requirements / pre-reqs ?
    2. How do you run the simple ffmpeg command I mentioned above with it (Only relevant for library solution) ?
    3. Is it possible to simply pass the entire .h264 file to the library to generate the corresponding .mp4 file or do I need to perform the encoding 1 frame at a time (Only relevant for library solution) ?

    I welcome any thoughts you may have on the background thread approach as well.

    Thanks !

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