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  • 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 (...)

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
    Binaires complémentaires et facultatifs flvtool2 : (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (4759)

  • Add audio (with an offset) to video with FFMPEG

    5 novembre 2011, par slotishtype

    I have a 10 minute video and a 50 minute audio mp3.
    The video starts at 500 seconds into the audio.
    Using FFMPEG, how can I add the the audio to the video but specify a 500 seconds audio offset (So that they sync up) ?

    EDIT:::: :

    Down the bottom of this page it suggests how to specify an offset.

    $ ffmpeg -i video_source -itsoffet delay -i audio_source -map 0:x -map 1:y ......

    However, when I apply this, it still starts the audio from the start.

    Thanks

  • PC Video Conferencing in the Year 1999

    21 juin 2011, par Multimedia Mike — General

    Remember Intel’s custom flavor of H.263 cleverly named I.263 ? I think I have finally found an application that used it thanks to a recent thrift shop raid— Intel Video Phone :



    The root directory of the disc has 2 copies of an intro.avi video. One copy uses Intel Indeo 3 video and PCM audio. The other uses I.263 video and an undetermined (presumably Intel-proprietary) audio codec — RIFF id 0x0402 at a bitrate of 88 kbits/sec for stereo, 22 kHz audio. The latter video looks awful but is significantly smaller (like 4 MB vs. 25 MB).

    This is the disc marked as "Send it to a friend...". Here’s the way this concept was supposed to operate :

    • You buy an Intel Video Phone Camera Pack (forgotten page courtesy of the Internet Archive) which includes a camera and 2 CDs.
    • You install the camera and video phone software on your computer.
    • You send the other CD to the person whom you want to be able to see your face when you’re teleconferencing with them.
    • The other party installs the software.
    • The 2 of you may make an internet phone call presumably using commodity PC microphones for the voice component ; the person who doesn’t have a camera is able to see the person who does have a camera.
    • In a cunning viral/network marketing strategy, Intel encourages the other party to buy the physical hardware as well so that they may broadcast their own visage back to the other person.

    If you need further explanation, the intro lady does a great job :



    I suspect I.263 was the video codec driving this since Indeo 3 would probably be inappropriate for real time video applications due to its vector quantizing algorithm.

  • Using ffmpeg to encode a high quality video

    7 janvier 2013, par CakeMaster

    I have a set of video frames saved as images in a directory, and I'm trying to encode these to a good quality video, however every setting and every format I try produces very noticeable artifacts.

    The basic command is this :

    ffmpeg -r 25 -i %4d.png myvideo.mpg

    and I've tried the minrate and maxrate flags. Any of mpg, avi, mov, flv formats will do.

    Any suggestions for settings ? Final file size is not an issue.

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