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Autres articles (64)

  • Contribute to a better visual interface

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    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
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  • Les notifications de la ferme

    1er décembre 2010, par

    Afin d’assurer une gestion correcte de la ferme, il est nécessaire de notifier plusieurs choses lors d’actions spécifiques à la fois à l’utilisateur mais également à l’ensemble des administrateurs de la ferme.
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Sur d’autres sites (7013)

  • FFMPEG compilation without compiler optimization

    4 avril 2018, par Kamil_H

    I’m compiling ffmpeg for win32 using Microsoft cl compiler. I need to compile it without any optimization, so added configure —extra-cflags= -Od".

    Compilation goes fine, but there are a few places like this :

    Last 3 ifs.

    The code compiles, but doesn’t link because calls like ff_sbrdsp_init_arm(s) ; are not removed by compiler. Of course everything is fine when compiling with optimization. Then compiler removes all if(0)s.

    There are several similar places in ffmpeg. Why if(0) is used instead of preprocessor’s #if 0 ?

    Is there any hidden trick behind this ?

  • Has anyone used Azure vm's for gpu-accelerated video enc/decoding with FFmpeg/libav ?

    4 mai 2017, par user3776020

    I am trying to use NVIDIA hardware acceleration with FFmpeg/libav on a Microsoft Azure GPU vm (any of the new N-series). I am able to get it working with a comparable AWS vm, but am not having luck with Azure.

    I have a different question posted here detailing the specific problem I’m running into (Trouble with hardware-assisted encoding/decoding via FFmpeg on Azure GPU vm’s (ubuntu 16.04)), but have since realized that the better question to ask is if anyone has been able to achieve it, full-stop.

    If so, would you please share the details of your environment (type of vm, os version, installation commands, etc). Thanks !

  • Linking against libx264 does not work (Cygwin)

    11 novembre 2011, par Erik

    I want to use libx264 in one of my projects on windows. I compiled x264 with cygwin including the shared and static library. Everythin works out fine, also the static and dynamic libraries are properly installed in cygwin.

    When trying to compile another project that uses libx264 (gcc ... -lx264) I get an error :

    /cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:406: undefined reference to `x264_param_default_preset(x264_param_t*, char const*, char const*)'
    
/cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:425: undefined reference to `x264_param_apply_profile(x264_param_t*, char const*)'

    The linker seems to have problem with my built libraries of libx264, but what is exactly wrong here ? How can I correctly link x264 ?

    The full build output looks like this :

    Build of configuration Debug for project test **

    make all 
    
Building target: test.exe
    
Invoking: Cygwin C++ Linker
    
g++ -L"/cygdrive/c/Program Files (x86)/Microsoft SDKs/Windows/v7.0A/Lib" -L"/cygdrive/c/Program Files (x86)/Microsoft DirectX SDK (June 2010)/Lib/x86" -L/usr/local/lib -o "test.exe"  ./main.o   -lx264.dll -lKernel32 -lUser32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32 -lole32 -ld3dx9d -ld3d9 -loleaut32 -luuid -lm
    
./main.o: In function `_Z8InitX264ii':
    
/cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:406: undefined reference to `x264_param_default_preset(x264_param_t*, char const*, char const*)'
    
/cygdrive/c/Users/Erik/workspace/test/Debug/../main.cpp:425: undefined reference to `x264_param_apply_profile(x264_param_t*, char const*)'
    
collect2: ld returned 1 exit status
    
make: *** [test.exe] Error 1
    

    
**** Build Finished ****

    Thanks for your help !

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