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  • Encodage et transformation en formats lisibles sur Internet

    10 avril 2011

    MediaSPIP transforme et ré-encode les documents mis en ligne afin de les rendre lisibles sur Internet et automatiquement utilisables sans intervention du créateur de contenu.
    Les vidéos sont automatiquement encodées dans les formats supportés par HTML5 : MP4, Ogv et WebM. La version "MP4" est également utilisée pour le lecteur flash de secours nécessaire aux anciens navigateurs.
    Les documents audios sont également ré-encodés dans les deux formats utilisables par HTML5 :MP3 et Ogg. La version "MP3" (...)

  • 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 (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

Sur d’autres sites (6311)

  • Input transparent motions into FFMPEG pipe:0

    29 septembre 2021, par NTPHCM

    I follow this to bring a stdinput to FFMPEG.

    


    The idea is : we use AS3 to capture every frame in Animate to byteArray (with ARGB pixel format - means the frame can have transparancy background). After that, we transfer that byteArray to FFMPEG to get output.

    


    If I capture non-transparency picture (the picture with background), the process works well to create motion video.

    


    But when I capture transparency picture and make motion (multi-frame video), the problem appears as below :
Output picture

    


    We can see the bird print a long streak, but I expect one bird flying from the right to the left like this.

    


    It seems like the previous frames are not cleared. Do you have any suggestions to solve this ?

    


  • FFMPEG outputs a broken-picture video when input alpha stdin videoraw

    27 septembre 2021, par NTPHCM

    I follow this to bring a stdinput to FFMPEG.

    


    The idea is : we use AS3 to capture every frame in Animate to byteArray (with ARGB pixel format - means the frame can have transparancy background). After that, we transfer that byteArray to FFMPEG to get output.

    


    If I capture non-transparency picture (the picture with background), the process works well to create motion video.

    


    But when I capture transparency picture and make motion (multi-frame video), the problem appears as below :
Output picture

    


    We can see the bird print a long streak, but I expect one bird flying from the right to the left like this.

    


  • FFMPEG & boxblur, alignment

    26 décembre 2020, par Дмитрий Варзанов

    enter image description here

    


    This is the original frame. It is necessary to bring it to a height of 594, and reduce the width in the proportion of Perform-vf "scale=-2:594", done. At the output, we have a height of 594, and a width of even less.

    


    But, the image width should be 1056, while not stretching the frame. That is, add curbs

    


    ffmpeg -i file -ss 10 -lavfi "[0:v]scale=1056:594,boxblur=luma_radius=min(h\,w)/50:chroma_radius=min(cw\,h)/50[bg];[bg][0:v]overlay=(W-w)/2:0" -vframes 1 output_image1.jpg


    


    The whole day I tried to set it up correctly, but it doesn't work out. The result is a width of 1056 and a height of 594. At the same time, the original frame, or rather the entire frame, did not fit in height. Cut from the bottom

    


    enter image description here

    


    How to perform so that the original frame is not cut off and the borders are called shadow. Was at the level of
enter image description here

    


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