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Autres articles (30)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (4372)

  • How to run .mp4 videos on firefox

    19 novembre 2015, par Haseeb Ahmad

    When play mp4 videos on chrome it works fine.But same videos not playing on firefox. After some search I found this

    Firefox does not support .mp4 playback. Try conveting the video to .ogg format which is fast becoming a standard format for html 5 applications.

    Now how I convert this to ogg for firefox.
    My model code is

    has_attached_file :videod, :styles => { 
    
  :medium => { :geometry => "640x480", :format => 'mp4' },
    
  :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 }
    
}, :processors => [:ffmpeg]
    
validates_attachment_size :videod, :less_than => 100.megabytes
    
    validates_attachment_presence :videod
    
    validates_attachment_content_type :videod, :content_type => /\Avideo\/.*\Z/

  • FFMPEG - Speed up video for time lapse - quicker/faster ?

    15 juillet 2023, par Chad Baldwin

    Okay, I know this question has been asked a bajillion times. However, I have one small addition to the question that I haven't seem to have been able to find in my googling.

    



    I'm certainly not a pro at FFMPEG...I've been using the standard speed up/slow down template for FFMPEG, the one I'm using is :

    



    ffmpeg -i input.mp4 -filter:v "setpts=PTS/60" -an output.mp4


    



    I'm currently working with an hour long 4K/60FPS video...I want to shrink it down to about 30 seconds or so, so I'm using PTS/100, and I don't need audio...the problem is, this is taking FOREVER...which I completely expected it to.

    



    But as I'm sitting here waiting for it to finish...I can't help but wonder...is there a faster/more efficient way to accomplish this ? I know there's a lot of weird things about FFMPEG in regards to the order of the commands you use to speed up seek time, and presets and etc.

    


  • FFMPEG with hardware codec support

    28 janvier 2012, par mctma

    I have built a simple media player using ffmpeg on Android 2.2. Hardware is an arm cortex-a8 based 1GHz processor, 512 MB RAM. I am getting low performance, around 15 FPS for 800x600 mp4 video. I have a couple of questions on how I can improve the performance

    • How can I use the hardware codecs available on my target device. How can I configure ffmpeg to use the available hardware decoders ? Does the GPU or graphics driver have to expose some standard API like OpenMax IL in order to this ?

    • What are the options that should be enabled when building ffmpeg so that it can be optimized for my target hardware ? Something like :
      --cpu=cortex=a8 --extra-cflags="-mfpu=neon" ...

    I have already looked around the net but I couldn't find the answers that I am looking for. I hope someone can advice me on this.

    Thanks in advance !

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