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Sur d’autres sites (4421)

  • Linking to libx264 library from c code Ubuntu

    30 janvier 2012, par Martin Conaghan

    I'm trying to write a small C application which uses the x264 API, and I'm having problems compiling the code with a link to the x264 libaray.

    In the /project/ directory there are two sub-folders :
    /project/mycode/ and
    /project/x264-snapshot-20120120-2245.

    I have installed x264 in the latter subdirectory using ./configure and then 'make'. As such the library I think I want to link to is /project/x264-snapshot-20120120-2245/libx264.a

    In /project/mycode/ I have a single source code file (prototype.c), which has the following imports :

    #include 
    
#include 
    
#include "../x264-snapshot-20120120-2245/x264_config.h"
    
#include "../x264-snapshot-20120120-2245/x264.h"

    As expected, if I try to compile without linking to the x264 library, I get an error :

    /project/mycode: gcc -o prototype prototype.c
    
/tmp/cc5NwRTp.o: In function `main':
    
prototype.c:(.text+0x6c): undefined reference to `x264_param_default_preset'
    
prototype.c:(.text+0xf6): undefined reference to `x264_param_apply_profile'
    
collect2: ld returned 1 exit status

    So I try to link the library I mentioned above, but it isn't found :

    /project/mycode: gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -llibx264.a
    
/usr/bin/ld: cannot find -llibx264.a
    
collect2: ld returned 1 exit status

    I've tried a few variations, like :

    gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -l ../x264-snapshot-20120120-2245/libx264.a
    
gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -llibx264
    
gcc -I ../x264-snapshot-20120120-2245/ -llibx264.a -o prototype prototype.c

    As is probably obvious by now, I'm fairly new to this, so I'm hoping there is an easy solution

  • windows phone8 wp8 arm neon assembly [closed]

    3 février 2013, par user2036635

    I am about to transplant a project onto wp8. Unfortunately, most part of the project was written by arm neon assembly code with AT&T format, just like ffmpeg(neon).

    Any suggestion about tools or methods to quickly doing that?

  • Libav/FFmpeg and Google Summer of Code 2012

    26 avril 2012, par Multimedia Mike — General, ffmpeg, gsoc, gsoc2012, hevc, libav, opus, rtmp, ut video

    So, the projects are participating in the Google Summer of Code for the 2012 season. (While Libav is the project officially accepted to particular, I still refer to the projects because FFmpeg will also benefit).

    Here are the students, projects, and mentors for this summer :

    1. Andrew D’Addesio is working on an Opus Decoder, mentored by Justin Ruggles
    2. Guillaume Martres is working on an HEVC video decoder, mentored by Mashiat Sarker Shakkhar
    3. Jan Ekström is working on an LGPL Ut Video encoder, mentored by Kostya Shishkov
    4. Jordi Ortiz is working to rewrite avserver, mentored by Luca Barbato
    5. Samuel Pitoiset is working on an RTMP[E|S|T|TE] protocol implementation, mentored by Martin Storsjö

    Wish them luck– these are some ambitious projects.

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