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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 (...)

  • MediaSPIP Player : problèmes potentiels

    22 février 2011, par

    Le lecteur ne fonctionne pas sur Internet Explorer
    Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
    Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...)

  • 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 (...)

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  • avcodec/libx265 : Don't copy A53 closed captions by default

    11 juin 2024, par Andreas Rheinhardt
    avcodec/libx265 : Don't copy A53 closed captions by default

    The SEI handling of libx265 is buggy and can easily lead
    
to memory corruption : It reuses certain buffers, but when
    
reusing them it presumes that it is enough for these buffers
    
to exist and does not check whether they are actually large
    
enough to hold what is intended to be stored in them.*
    

    Our users are exposed to this because forwarding A53 CC data
    
is enabled by default. Change this to make it disabled
    
by default.
    

    "Fixes" tickets #10411, #11052 and (presumably) #10906.
    

    * : See https://trac.ffmpeg.org/ticket/9666#comment:1
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavcodec/libx265.c

  • How to mimic Audacity's "truncate silence" with ffmpeg "silenceremove" filter

    16 juin 2024, par Cara Duf

    I want to remove completely silence parts from wav files with ffmpeg.

    &#xA;

    Input wav can be like :&#xA;enter image description here

    &#xA;

    I am using the following ffmpeg command to remove silence part ffmpeg -i input.wav -af silenceremove=stop_periods=-1:stop_duration=0.2:stop_threshold=-45dB output.wav because I understand from the doc that it will remove all silence parts longer than 0.2 s (silence being below -45dB).

    &#xA;

    But I get that enter image description here where silence part has only been reduced to around 0.1 wheras I want it to be 0 (no remaining silence).

    &#xA;

    In Audacity I will use "truncate audio" filter and choose the above parameters to detect silence and in the action part I will choose to truncate to 0 : enter image description here.

    &#xA;

    This will yield to what I want (ie an audio with no silence part remaining) :&#xA;enter image description here

    &#xA;

    Searching on the internet only lead me to what I already do.

    &#xA;

    So how can I reproduce the output I get from Audacity "Truncate Silence" filter with ffmpeg and remove all silence parts from audio ?

    &#xA;

    Edit : The output from silencedetect filter is correct : ffmpeg -i input.wav -af silencedetect=0.2:n=-45dB -f null - detects exactly what audacity detects.

    &#xA;

    Thanks in advance for your help

    &#xA;

  • avcodec/hevc/Makefile : Move rules for lavc/* files to lavc/Makefile

    5 juin 2024, par Andreas Rheinhardt
    avcodec/hevc/Makefile : Move rules for lavc/* files to lavc/Makefile

    If any of these files (say A) would be changed in such a way
    
that A acquires a new dependency on another file B, building B
    
would need to be added to all the rules that lead to A being built.
    
Yet currently the rules for several files are spread over
    
the lavc Makefile and the Makefile of the lavc/hevc subdir, making
    
it more likely to be forgotten. So move the rules for these files
    
to the lavc/Makefile.
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavcodec/Makefile
    • [DH] libavcodec/hevc/Makefile

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