Recherche avancée

Médias (1)

Mot : - Tags -/artwork

Autres articles (103)

  • 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 (...)

  • Formulaire personnalisable

    21 juin 2013, par

    Cette page présente les champs disponibles dans le formulaire de publication d’un média et il indique les différents champs qu’on peut ajouter. Formulaire de création d’un Media
    Dans le cas d’un document de type média, les champs proposés par défaut sont : Texte Activer/Désactiver le forum ( on peut désactiver l’invite au commentaire pour chaque article ) Licence Ajout/suppression d’auteurs Tags
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire. (...)

Sur d’autres sites (3590)

  • Generate FFMPEG Waveform Data

    30 septembre 2015, par samchoi

    Given a video file (e.g. test.mkv), is it possible to output the data points used to create a waveform using ffmpeg (or any other tool) ?

    I’m looking to create a file that maps audio level to time, so that I can parse the data. Most of the examples I am finding, output an image.

    The closest I’ve gotten is generating raw binary data with :
    ffmpeg -i test.mkv -ac 1 -filter:a aresample=8000 -map 0:a -c:a pcm_s16le -f data -

  • Passing raw RTMP video data to FFmpeg

    24 décembre 2019, par don_aman

    I am trying to implement a simple RTMP client in Node.js using TCP sockets and FFmpeg. Until now I have implemented the connection to a stream, after which the server starts sending video and audio data messages. According to Wireshark the first byte of such messages contains information related to the type of frame and data encoding (codecs), in my client app video data is in "Sorensen H.263" format.

    When I use ffplay to play the stream, it logs the video data is in FLV format, but when passing the packets payload data to ffmpeg using this format I always get this error :

    pipe:: Invalid data found when processing input

    What parameters should I provide to ffmpeg when piping RTMP video data to get proper video output in any desired format ?

  • Extract luminance data using ffmpeg libavfilter, specifically PIX_FMT_YUV420P type

    12 mars 2014, par id128

    This pertains to ffmpeg 0.7 (yes I know it's old, but data access should be similar).

    I am writing a libavfilter to extract the luminance data from each frame. In draw_slice() function I have access to AVFilterLink structure which in turn gives me access to AVFilterBufferRef structure that have uint8_t *data[] pointers. With the PIX_FMT_YUV420P type, I think data[0], data[1], data[2] refers to Y U V channels respectively.

    My question is, with the pointer to data[0] (luminance plane), how do I interpret the data ? The pixfmt.h header file states :

    PIX_FMT_YUV420P, ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)

    does that mean I have to interpret the luminance plane data every 2 bytes ? Also, what exactly is the datatype for the values pointed to by the pointer - int, float, etc ?

    Thanks in advance

Navigation