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  • 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 (...)

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

Sur d’autres sites (3861)

  • FFmpeg stream dynamic png

    13 avril 2017, par Azarus

    I would like to know if its possible to stream a png or any kind of image using ffmpeg. I would like to generate the image contiously using nodejs that updates every 10 seconds. I would like to display game stats with this in a corner and mix it with some background music or pre recorded commentary on it. Additionaly i would like to mix a video and the image should act like an overlay.

    I am also not sure if using a transparent png image its possible to do

    I couldn’t get my head around doing the mixing with ffmpeg and its looks very complicated so i would like to get some help on it.

    I have video files stored in a folder that i would like to continously stream and mix different music and an image on it. I would like to have it all continously working without stopping the stream.

    Is it possible with ffmpeg cli on linux or i cant avoid using a desktop windows pc for such thing ?

  • How to programmatically adjust a folder of audio files so they are all about the same loudness ?

    6 mars 2016, par Biagio Arobba

    I have a website that collects audio recordings from visitors using Flash, I am using ffmpeg2theora to convert the files from FLV to OGG...because I am re-using the files for an HTML5 Web page (OGG is supported on Firefox and Chrome). But, some files are loud and some are really quiet.

    Is there a way to make all the files sound about the same loudness ? It’s OK if the quality is poorer for the quieter audio files, just as long as it’s easier to hear the message that someone has left.

  • Space Adventure CD-ROM

    1er octobre 2011, par Multimedia Mike — Game Hacking

    I acquired a CD-ROM entitled Space Adventure by Knowledge Adventure (I like these people ; they make decent, entertaining educational games). The physical media displays a copyright date of 1993, very early in the multimedia era.



    This 1993 CD-ROM makes proud use of multimedia files. What kind ? There’s a movies/ directory with 17 .mov files. It would be way too simple if these were QuickTime files, though. These represent a custom format, and video-only since a separate sounds/ directory contains .snd files with filenames corresponding to the .mov files. The .snd files are actually Creative Voice (a.k.a. VOC) files. As for this MOV format, wiki page and samples.



    I was also surprised to find the binary ultrasnd.exe file among the drivers on the disc. The Gravis UltraSound was released in 1992. The sound setup utility does not have an option for the GUS, however. No matter since DOSBox has great SB/Pro/16 emulation.

    I’m also a bit puzzled about why the DOSBox screenshots are 720 x 480 (posted here are various cropping and resizings).

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