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  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • 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 (...)

  • 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 (...)

Sur d’autres sites (5984)

  • FFMPEG : how to determine which filters are supported by specific hardware acceleration contexts ?

    7 juin 2020, par John Allard

    I'm having trouble figuring out precisely which filter graph operations are supported by each of the available hardware acceleration methods. I know, for example, that almost all of these methods perform simple operations like scaling, but what about more complicated ffmpeg filters like the new v360 filter or the mestimate filter ?

    



    There's this page (https://trac.ffmpeg.org/wiki/HWAccelIntro) that everyone finds when researching hardware accel with ffmpeg but it mostly touched on encoding and decoding and not filtering.

    


  • How to make video effect in video by ffmpeg module in Node JS ?

    20 juin 2015, par Nazmul Hossain Bilash

    I am working with ffmpeg. I want to give effects in video like grayscale, Sepia, Blur in video. Also I want to add text in those videos. How can I make this with ffmpeg in node js. I have worked with fluent-ffmpeg & ffmpeg node module.

    I have seen this article : https://trac.ffmpeg.org/wiki/FancyFilteringExamples Here is the example of video effect by ffmpeg command. But I need to to how I can make this effects through Node JS.

  • writting mp4 file from binary string python

    25 avril 2016, par Irakli Mchedlishvili

    I have a Binary string of mp4 video file and want to convert it back to mp4 file, to get single frame out of there with openCV library

    import cv2
    
import tempfile
    

    
temp_path = tempfile.gettempdir()
    
video_binary_string = 'AAAAIGZ0eXBpc29tAAACAGlzb21pc28yYXZjMW1wNDEAAAAIZnJlZQAQC0ttZGF0AQIUGRQmM...'
    

    
with open(temp_path+'/video.mp4', 'wb') as wfile:
    
   wfile.write(video_binary_string)
    
cap = cv2.VideoCapture(temp_path+'/video.mp4')
    
success, frame = cap.read()
    

    
print success
    
>>> False

    If frame was read correctly, it would be True

    I understand that this is not the correct way of writing video file. I tried to do it with FFMPEG but I can’t understand it’s documentation.

    Please give an example with simple explanations how to convert binary string back to video, with this or other way.

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