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Autres articles (42)

  • 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 (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (7001)

  • Command to get information about a mp3 using ffmpeg ?

    19 septembre 2011, par LedZeppelin

    Is there a command with ffmpeg that returns information about an mp3 like the bitrate or sampling frequency ?

  • Command to get information about a mp3 using ffmpeg ?

    25 février 2024, par user784637

    Is there a command with ffmpeg that returns information about an mp3 like the bitrate or sampling frequency ?

    


  • Camera's pts and dts jumps issue

    14 mars 2014, par tilzaer

    I use ffmpeg library in my code for capturing rtsp streams from cameras and writing in flv. If I capture streams from only one camera and camera has only video stream then there's no any errors, I got first packet with pts and dts 1698557894 and other packets' pts and dts slowly increases. But if camera has video and audio streams, then strange things occur. For example, video packets pts and dts begin with 1698557894 and slowly increase, and audio starts with 0 then slowly increases and after 50 packets jumps to value 151004317 and slowly increase. Another situation, when audio begins with 0 and slowly increases, and video begins from 1785662594 and after 70 packets jumps to 234722 and slowly increase. Such behaviour do not allow flv segment muxer to write files, it just returns some EINVAL value.

    Also if I try to capture streams from two cameras, first camera has only video and another has video and audio, then first camera packets' pts and dts are ok. But another camera has video and audio pts/dts values which are very different. av_read_frame returns video packet with pts/dts value 1811924055, which rescales to 557003451 in flv muxer and audio 4456027604, which rescales to 557003451, but these values must be almost equal !

    So, the questions are :
    0) why do these jumps occur in the beginning of capturing ? is it a problem with camera or it is just some ffmpeg issue ?
    1) can such jump occur after some long period ? how I should handle it ?
    2) why camera's video and audio have so different pts/dts values ?

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