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Autres articles (31)

  • 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 (...)

  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

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  • Scaling seems to crop edges of video

    7 septembre 2020, par Jao

    I'm doing some automation with FFmpeg and I need to be able to scale up and down videos. So I tried using the scale filter. No issue when I'm scaling up but when I'm scaling down I'm losing a few pixels from the bottom of the video and I must keep everything.

    


    Here is an example :

    


    $ ffmpeg.exe -i video.avi -vf scale=1536:644 video_resized.avi


    


    Here, video.avi is 2048x858.
I tried a lot of parameters, algorithms and flags but nothing seems to "fix" it. Maybe it is normal and I'm not understanding correctly how scaling works but I need to resize without loss of edges.
Thanks in advance

    


  • FFmpeg : How to change tempo dynamically

    25 octobre 2018, par Ankush

    I am working on an android project in which I need to change the tempo of an mp3 (50 seconds audio) file dynamically as shown :

          Time            |    Tempo
    
 ----------------------------------------------
    
      0-4             |     1.0    
    
                      |    
    
      4-8             | change form 1.0 to 0.5 
    
                      |
    
      8-12            |     0.5
    
                      |
    
      12-16           | change from 0.5 to 1
    
                      |
    
      16-20           |     1
    
                      |
    
      20-24           | change from 1 to 1.5
    
                      |
    
      24-28           |     1.5
    
                      |
    
      28-32           | change from 1.5 to 1
    
                      |
    
      32-36           |     1
    
                      |
    
      36-40           | change from 1 to 1.5
    
                      |
    
      40-44           |     1.5
    
                      |
    
      44-48           | change from 1.5 to 1
    
                      |
    
      48-50           |     1

    I had searched and found that I can use atempo for this. But it changes the whole audio tempo. I think that I can split the audio and apply the effect but it also not work for this type of dynamic task. Please help me to find the solution. Thank you in advance :)

  • Hot to copy frame data from FFmpegSource2 (FFMS2) FFMS_Frame struct to OpenCV Mat ?

    4 octobre 2013, par Yashil

    I'm trying to read video file using FFmpegSource2 (FFMS2) and then process frames using OpenCV. What is the proper and efficient way to copy frame data from a FFMS_Frame struct returned by FFMS_GetFrame function to an OpenCV Mat ?

    Thank you very much in advance.

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