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Autres articles (93)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

  • 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 : (...)

Sur d’autres sites (12183)

  • change wav, aiff or mov audio sample rate of MOV or WAV WITHOUT changing number of samples

    6 mars 2013, par John Pilgrim

    I need a very precise way to speed up audio.
    I am preparing films for OpenDCP, an open-source tool to make Digital Cinema Packages, for screening in theaters.
    My source files are usually quicktime MOV files at 23.976fps with 48.000kHz audio.
    Sometimes my audio is a separate 48.000kHz WAV.
    (FWIW, the video frame rate of the source is actually 24/100.1 frames per second, which is a repeating decimal.)

    The DCP standard is based around a 24.000fps and 48.000kHz program, so the audio and video of the source need to be sped up.
    The image processing workflow inherently involves converting the MOV to a TIF sequence, frame-per-frame, which is then assumed to be 24.000fps, so I don't have to get involved in the internals of the QT Video Media Handler.

    But speeding up the audio to match is proving to be difficult. Most audio programs cannot get the number of audio samples to line up with the retimed image frames. A 0.1% speed increase in Audacity results in the wrong number of samples. The only pathway that I have found that works is to use Apple Cinema Tools to conform the 23.976fps/48.000kHz MOV to 24.000fps/48.048kHz (which it does by changing the Quicktime headers) and then using Quicktime Player to export the audio from that file at 48.000kHz, resampling it. This is frame accurate.

    So my question is : are there settings in ffmpeg or sox that will precisely speed up the audio in a MOV or in a WAV or AIFF precisely ? I would like a cross platform solution, so I am not dependent on Cinema Tools, which is only MacOS.

    I know this is a LOT of background. Feel free to ask clarifying questions !

  • Automate single quote escape in batch file

    23 avril 2019, par unident77

    I’m using a pretty simple ffmpeg batch script, but it can’t convert videos with single quotes in their titles. If the title is Boogiepop Phantom - 1x11 - Under The Gravity's Rainbow for example, I’ll get the error [Parsed_subtitles_0 @ 000000670ea89ec0] Unable to open Boogiepop Phantom - 1x11 - Under The Gravitys Rainbow.mkv Note the removed single quote.

    I know ^ is the escape character, but the single quote is in a different spot every time. Do I need regex or is there a simpler way ?

    for %%a in ("*.mkv") do ^
    
ffmpeg -i "%%a" ^
    
-vf subtitles="%%a" ^
    
"NEW\%%~na.mkv"
    
pause

  • Automate single quote escape in batch file

    21 décembre 2015, par unident77

    I’m using a pretty simple ffmpeg batch script, but it can’t convert videos with single quotes in their titles. If the title is Boogiepop Phantom - 1x11 - Under The Gravity's Rainbow for example, I’ll get the error [Parsed_subtitles_0 @ 000000670ea89ec0] Unable to open Boogiepop Phantom - 1x11 - Under The Gravitys Rainbow.mkv Note the removed single quote.

    I know ^ is the escape character, but the single quote is in a different spot every time. Do I need regex or is there a simpler way ?

    for %%a in ("*.mkv") do ^
    
ffmpeg -i "%%a" ^
    
-vf subtitles="%%a" ^
    
"NEW\%%~na.mkv"
    
pause

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