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Autres articles (15)

  • 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 (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • 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 (4007)

  • Expand (extend) a video to an specific duration [closed]

    1er octobre 2020, par BorrajaX

    Do VLC or FFmpeg (or AVconv) have any feature to force the duration of a video to a certain number of seconds ?

    



    Let's say I have a... 5 minutes .mp4 video (without audio). Is there a way to have any of the aforementioned tools "expanding" the video to a longer duration ? The video comes from a Power Point slideshow, but it's too short (running too fast, to say so). The idea would be automatically inserting frames so it reaches an specified duration. It looks like something pretty doable (erm... for a total newbie in video encoding/transcoding as I am) : A 5 minutes video, at 30fps means I have 9000 frames... To make it be 10 times longer, get the first "real" frame, copy it ten times, then get the second "real" frame, copy it ten times... and so on.

    



    I'm using Ubuntu 12.04, but I can install/compile any required software, if needed. So far, I have VLC, AVConv and FFmpeg (FFmpeg in an specific folder, so it won't conflict with AVConv)

    



    Thank you in advance.

    


  • Expand (extend) a video to an specific duration

    8 février 2013, par BorrajaX

    Do VLC or FFmpeg (or AVconv) have any feature to force the duration of a video to a certain number of seconds ?

    Let's say I have a... 5 minutes .mp4 video (without audio). Is there a way to have any of the aforementioned tools "expanding" the video to a longer duration ? The video comes from a Power Point slideshow, but it's too short (running too fast, to say so). The idea would be automatically inserting frames so it reaches an specified duration. It looks like something pretty doable (erm... for a total newbie in video encoding/transcoding as I am) : A 5 minutes video, at 30fps means I have 9000 frames... To make it be 10 times longer, get the first "real" frame, copy it ten times, then get the second "real" frame, copy it ten times... and so on.

    I'm using Ubuntu 12.04, but I can install/compile any required software, if needed. So far, I have VLC, AVConv and FFmpeg (FFmpeg in an specific folder, so it won't conflict with AVConv)

    Thank you in advance.

  • lavc/opusdsp : simplify R-V V postfilter

    16 décembre 2023, par Rémi Denis-Courmont
    lavc/opusdsp : simplify R-V V postfilter

    This skips the round-trip to scalar register for the sliding 'x'
    
coefficients, improving performance by about 5%. The trick here is that
    
the vector slide-up instruction preserves elements in destination vector
    
until the slide offset.
    

    The switch from vfslide1up.vf to vslideup.vi also allows the elimination
    
of data dependencies on consecutive slides. Since the specifications
    
recommend sticking to power of two offsets, we could slide as follows :
    

            vslideup.vi v8, v0, 2
    
        vslideup.vi v4, v0, 1
    
        vslideup.vi v12, v8, 1
    
        vslideup.vi v16, v8, 2
    

    However in the device under test, this seems to make performance slightly
    
worse, so this is left for (in)validation with future better hardware.
    • [DH] libavcodec/riscv/opusdsp_rvv.S

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