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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • 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).
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  • Encode PCM to MPEG-2 AAC with FFmpeg APIs

    13 août 2019, par Tank2006

    My environment is "ffmpeg version 3.4.6-0ubuntu0.18.04.1"

    I wrote a program to encode audio data into MPEG-2 AAC with reference to an official example.

    First, I simply changed the encoder value(and the full source code I wrote is here).

    if (!(output_codec = avcodec_find_encoder(AV_CODEC_ID_AAC))) {

    But FFmpeg S/PDIF encoder(spdifenc.c) returns an error “Wrong AAC file format”.

    I use avctx->profile = FF_PROFILE_MPEG2_AAC_LOW(FF_PROFILE_MPEG2_AAC_HE); but it takes no effects.

    Considering the possibility that the official binary was not compiled with the "CONFIG_ADTS_HEADER" C flag, I ran the following code directly as this :

    buf = output_packet.data;
    
int err = init_get_bits8(&gb, buf, 7);
    
if (get_bits(gbc, 12) != 0xfff) return AAC_AC3_PARSE_ERROR_SYNC;

    This didn’t find ADTS header "0xFFF", therefore, an encoder doesn’t seem to work as expected.

    How do I encode ffmpeg-2 aac audio with ffmpeg apis ?

  • installing ffmpeg on Mac fail

    23 juillet 2022, par wei wang

    I tried to install ffmpeg on Mac(macOS 10.13) with : brew install ffmpeg

    


    but I got below ....

    


    Updating Homebrew...
Warning: You are using macOS 10.13.
We (and Apple) do not provide support for this old version.
You will encounter build failures with some formulae.
Please create pull requests instead of asking for help on Homebrew's GitHub,
Twitter or any other official channels. You are responsible for resolving
any issues you experience while you are running this
old version.

Error: ffmpeg: no bottle available!
You can try to install from source with:
  brew install --build-from-source ffmpeg
Please note building from source is unsupported. You will encounter build
failures with some formulae. If you experience any issues please create pull
requests instead of asking for help on Homebrew's GitHub, Twitter or any other
official channels.


    


  • How to download/convert multiple streams to multiple outputs with FFmpeg ?

    16 avril 2016, par Website Newbie

    Let’s say I have 20 different online stream videos (playlist.m3u8) and I want every video to output to their own .avi files. How can I do that in single file, so I don’t have to download and convert every single one separately ?

    I found a -map command online, but didn’t get straight answer to this.

    Will this be a working code ?

    ffmpeg -i 1playlist.m3u8 -vf scale=768:-1 -vcodec libx264 -crf 24 -acodec copy -map 0 1.avi \
    
-i 2playlist.m3u8 -vf scale=768:-1 -vcodec libx264 -crf 24 -acodec copy -map 1 2.avi \
    
-i 3playlist.m3u8 -vf scale=768:-1 -vcodec libx264 -crf 24 -acodec copy -map 2 3.avi

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