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Médias (91)

Autres articles (35)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • 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 (...)

  • 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 (...)

Sur d’autres sites (3759)

  • h264 : drop any pretense of support for data partitioning

    19 janvier 2015, par Anton Khirnov
    h264 : drop any pretense of support for data partitioning

    It does not work correctly and apparently never did. There is no
    
indication that this (mis)feature is ever used in the wild or even that
    
any software other than the reference supports it.
    

    Since the code that attempts to support it adds some nontrivial
    
complexity and has resulted in several bugs in the past, it is better to
    
just drop it.
    • [DBH] libavcodec/h264.c
    • [DBH] libavcodec/h264.h
    • [DBH] libavcodec/h264_slice.c

  • Feed raw data to ffmpeg from python

    27 octobre 2020, par eri

    I want to wrap h264 stream to mp4 container on fly. But ffmpeg exits after first buffer

    


    ffmpeg = subprocess.Popen("ffmpeg -f h264 -i pipe: -c copy -f mp4 -movflags frag_keyframe+empty_moov+faststart pipe:".split(), stdout=subprocess.PIPE, stdin=subprocess.PIPE)

fd = ffmpeg.stdout.fileno()
fl = fcntl.fcntl(fd, fcntl.F_GETFL)
fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK)

while True:
    data = infile.read(32768)
    ffmpeg.stdin.write(data)
    data = ffmpeg.stdout.read()
    outfile.write(data)


    


  • ffmpeg - Extract Video filesize from virtual data

    18 décembre 2015, par Youssef El Gharbaoui

    I am trying to calculate a video filesize from its data using FFMPEG.

    Assuming that I have the following data in my disposal :

    • vcodec => mp4a.40.2
    • acodec => avc1.64001F
    • format_note => hd720
    • height => 720
    • width => 1280
    • ext => mp4
    • duration => 56 (seconds)

    Questions :

    1. Is there any mathematical formula that can extract the video
      filesize using the data above
    2. Is it possible to simulate and extract the filesize of a
      non-existing file using the data above
    3. If FFMPEG cannot accomplish what Im asking, what do you suggest ?

    Please let me know if you need any additional information.

    Thanks for your help.

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