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Autres articles (79)

  • 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 (6324)

  • How to convert an IP Camera video stream into a video file ?

    14 novembre 2014, par AgentFire

    I have a URL (<ip>/ipcam/mpeg4.cgi</ip>) which points to my IP camera which is connected via Ethernet.
    Accessing the URL resuls in a infinite stream of video (possibly with audio) data.

    I would like to store this data into a video file and play it later with a video player (HTML5’s video tag is preferred as the player).

    However, a straightforward approach, which is simple saving the stream data into .mp4 file, didn’t work.

    I have looked into the file and here is what I saw (click to enlarge) :

    It turned out, there are some HTML headers, which I further on manually excluded using the binary editing tool, and yet no player could play the rest of the file.

    The HTML headers are :

    --myboundary
    
Content-Type: image/mpeg4
    
Content-Length: 76241
    
X-Status: 0
    
X-Tag: 1693923
    
X-Flags: 0
    
X-Alarm: 0
    
X-Frametype: I
    
X-Framerate: 30
    
X-Resolution: 1920*1080
    
X-Audio: 1
    
X-Time: 2000-02-03 02:46:31
    
alarm: 0000

    My question is pretty clear now, and I would like any help or suggestion. I suspect, I have to manually create some MP4 headers myself based on those values above, however, I fail to understand format descriptions such as these.

    I have the following video stream settings on my IP camera (click to enlarge) :

    I could also use the ffmpeg tool, but no matter how I try and mix the arguments to the program, it keeps telling me this error :

  • Add unique color watermark per frame with FFMpeg

    26 octobre 2018, par Dustin Kerstein

    I’ve been able to add a random color watermark with this code :

    ffmpeg -y -r 100 -i "N%3d.tif" -c:v libx264 -vf "drawbox=y=0:color=random@1:width=8:height=ih:t=fill,scale=1920:1080" -crf 30 -g 10 -profile:v high -level 4.1 -pix_fmt yuv420p test.mp4

    And I know that it’s doable with a script and processing each input frame individually, but I would really like to find a way with FFMpeg to add the watermark during the actual video encoding. It needs to be a unique color per frame. Any ideas on how to accomplish this ?

    Thanks !

  • How to convert a 4K ProRes into different formats with FFmpeg ?

    18 octobre 2018, par adsalpha

    I have a video which is 3840 × 2160 encoded using Apple ProRes 422.

    I need to convert it to the following sizes/codecs without losing in quality :

    1. ProRes 422 1080p ;
    2. H264 4K ;
    3. H264 1080p.

    I need to do it programmatically so I went with FFmpeg. My command is ffmpeg -i input.mov -vf scale=1920:1080 -c:v prores_ks -preset slow output.mov. I don’t like the result – the colors are less saturated.

    What is the right command to do it ?

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