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Autres articles (94)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

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  • How to find metadata offset on incomplete video file ?

    12 juin 2015, par Etherealone

    Is there a way to find the metadata offset of an incomplete mp4 file ?

    I have an mp4 video file that has the following layout :

    ftyp          0 20
    
mdat         20 364893627
    
moov  364893647 2753229

    Now, when this file is incomplete, ffmpeg complains that [mov,mp4,m4a,3gp,3g2,mj2 @ 0xfd74f4a0] moov atom not found. Is there a way locating the offset of the moov section. Does ftyp contain information about moov placement ?

  • C program cannot find function which included in header file

    17 juin 2013, par Juneyoung Oh

    I made program like this.

      1 #include 
    
  2 #include 
    
  3 #include 
    
  4 #include "libavformat/avformat.h"
    
  5 
    
  6 int main (int argc, char* argv[]){
    
  7         av_register_all();
    
  8         return 0;
    
  9 }

    My header file located in

    root@ubuntu:/home/juneyoungoh/getDuration# find / -name "avformat.h"
    
/root/ffmpeg/libavformat/avformat.h
    
/usr/local/include/libavformat/avformat.h

    then I run with gcc getDuration.c , but I show message like below.

    root@ubuntu:/home/juneyoungoh/getDuration# gcc getDuration.c 
    
/tmp/ccwjonqH.o: In function `main':
    
getDuration.c:(.text+0x10): undefined reference to `av_register_all'
    
collect2: ld returned 1 exit status

    Frankly, I do not have any idea what makes this.

    Thanks for your answers.

    ========================== edited #1 ===========================

    when I "ls /usr/local/lib", I get this.

    root@ubuntu:/home/juneyoungoh/getDuration# ls /usr/local/lib/
    
libavcodec.a   libavutil.a    libopus.la       libvpx.a   python2.7
    
libavdevice.a  libfdk-aac.a   libpostproc.a    libx264.a
    
libavfilter.a  libfdk-aac.la  libswresample.a  libyasm.a
    
libavformat.a  libopus.a      libswscale.a     pkgconfig

    you can see libavformat.a in the very first of the last line.

    so if I command like what you suggest, I get below.

    /root/ffmpeg/libavformat/vqf.c:244: undefined reference to `av_free_packet'
    
/usr/local/lib//libavformat.a(vqf.o): In function `add_metadata':
    
/root/ffmpeg/libavformat/vqf.c:58: undefined reference to `av_malloc'
    
/root/ffmpeg/libavformat/vqf.c:64: undefined reference to `av_dict_set'
    
/usr/local/lib//libavformat.a(vqf.o): In function `vqf_read_header':
    
/root/ffmpeg/libavformat/vqf.c:148: undefined reference to `av_dict_set'
    
/root/ffmpeg/libavformat/vqf.c:208: undefined reference to `av_log'
    
/root/ffmpeg/libavformat/vqf.c:216: undefined reference to `av_malloc'
    
/root/ffmpeg/libavformat/vqf.c:170: undefined reference to `av_log'
    
/root/ffmpeg/libavformat/vqf.c:121: undefined reference to `av_log'
    
/root/ffmpeg/libavformat/vqf.c:184: undefined reference to `av_log'
    
/root/ffmpeg/libavformat/vqf.c:136: undefined reference to `av_log'
    
/usr/local/lib//libavformat.a(wavenc.o): In function `wav_write_trailer':
    
/root/ffmpeg/libavformat/wavenc.c:210: undefined reference to `av_rescale'
    
/usr/local/lib//libavformat.a(wavenc.o): In function `wav_write_packet':
    
/root/ffmpeg/libavformat/wavenc.c:181: undefined reference to `av_log'

    It is too long, so I just post little part of that.

    I think all link of libavformat has been broken, But I do not know

    what can I do to fix that link.

    I have installed that their official link said.

    https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuideQuantal

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