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Autres articles (105)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • 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 (...)

Sur d’autres sites (8181)

  • Double decoding with same bitrate android

    3 mars 2016, par Bee

    How to do double decoding with same bit rate android ? I mean I want to play 2 videos in 2 different views but syncronisedly. I found this grafika double decoder. But it is not with same bitrate.
    The documentation says that.
    Any one know any sample project or guideline that I can follow ? Or maybe just can illustrate the steps I have to do ? May be used ffmpeg or something else ?

  • What options I should use to rescale video without skewing them in FFMPEG Rails ?

    5 juin 2019, par ADMAT Bandara

    The main issue happens when it processes the recalling

    All videos uploading from Apple iOS will process nicely.
    But all videos uploading from Android devices are getting skewed.

    In my rails app, I am using Carrierwave:Video and FFMPEG to process videos with the help of delayed jobs.

    class VideoUploader < CarrierWave::Uploader::Base
    

    
  include CarrierWave::Video
    
  include CarrierWave::Video::Thumbnailer
    

    
  # For carrierwave_backgrounder
    
  include ::CarrierWave::Backgrounder::Delay
    

    
  version :rescaled do
    
    process encode_video: [
    
      :mp4,
    
      resolution: "640x480", # Aspect ratio is preserved automatically
    
      audio_codec: "aac",
    
      custom: "-strict experimental -q:v 0 -preset slow -g 30",
    
      callbacks: { after_transcode: :set_success }
    
    ]
    
  end
    

    

    
  version :thumb do
    
    process thumbnail: [{format: 'png', quality: 10, size: 400, strip: true, logger: Rails.logger}]
    
    def full_filename for_file
    
      png_name for_file, version_name
    
    end
    
  end

    This is correct videos screenshot

    https://drive.google.com/open?id=1D0aNWcVxtL6DbTwBmWWIGzUUuyEyWNOG

    This the video screenshot after video process with FFMPEG

    https://drive.google.com/open?id=1vilExHoan2UuRPH9RbiZig58H1TwyewA

    (It’s like vertically pressed)

    Please help me, if you know a solution

  • How to interpret ffmpeg -pix_fmts output ?

    11 août 2015, par RichAmberale

    Running ffmpeg -pix_fmts returns a list of formats. Snip :

    IO... yuv444p16be            3            48
    
..H.. vdpau_mpeg4            0             0
    
..H.. dxva2_vld              0             0
    
IO... rgb444le               3            12
    
IO... rgb444be               3            12
    
IO... bgr444le               3            12

    What do the I O and H on the right side mean ? What are the numbers in the 2 leftmost columns ?

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