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Autres articles (35)

  • 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 (...)

  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

Sur d’autres sites (5515)

  • Is it possible to force ffmpeg/libav decoder to output an H.264 frame with only current information ?

    19 mars 2018, par Andy Krouwel

    I’m currently using a slightly legacy version of ffmpeg/libav to decode H.264 frames.

    It decodes them with a call to :

    avcodec_decode_video2(context, &outPicture, &gotPicture, inNALPacket);

    For this I provide a series of NAL packets, and once it has ’enough’ it produces the image frame, as outPicture.

    So far, so good.

    However, sometimes (due to network issues) a packet/NAL goes missing.
    I can detect this.
    When this happens I would like to give up on this frame, and tell the decoder to just give me its best shot at the image, given the data so far.

    Is there any way of doing this ? eg. can I construct an inNALPacket that essentially tells the encoder to give up and move on ?

  • ffmpeg link error : undefined reference in library sources

    31 janvier 2016, par Arton

    I downloaded the ffmpeg from git, and make the libs by sources. Created main.c as below and put the ffmpeg libs in the same folder as main.c, (my system is ubuntu 15.10, gcc version 5.2.1)

    #include 
    
void av_register_all(void);
    
int main() {
    
    printf("abc\n");
    
    av_register_all();
    
    return 0;
    
}

    After I issued gcc main.c -L. -lavformat -lswscale  -lavcodec -lswscale -lavutil -lavdevice -lavfilter, I got a lot of (nearly 1000) undefined reference errors :

    ...
    
/home/arton/sources/ffmpeg/libavcodec/vorbisdec.c:868: undefined reference to `atan'
    
/home/arton/sources/ffmpeg/libavcodec/vorbisdec.c:868: undefined reference to `atan'
    
/home/arton/sources/ffmpeg/libavcodec/vorbisdec.c:869: undefined reference to `atan'
    
/home/arton/sources/ffmpeg/libavcodec/vorbisdec.c:869: undefined reference to `atan'
    
/home/arton/sources/ffmpeg/libavcodec/vorbisdec.c:869: undefined reference to `floor'
    
...

    /home/arton/sources is where the ffmpeg sources at, I have no idea why it report the sources path of ffmpeg and why the link fails. Any hint is appreciated. Thanks !

  • Neutral net or neutered

    4 juin 2013, par Mans — Law and liberty

    In recent weeks, a number of high-profile events, in the UK and elsewhere, have been quickly seized upon to promote a variety of schemes for monitoring or filtering Internet access. These proposals, despite their good intentions of protecting children or fighting terrorism, pose a serious threat to fundamental liberties. Although … Continue reading →

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