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• avcodec/h263dec : Reinitialize idct context if it has not been setup for the active...

  28 mai 2018, par Michael Niedermayer

  avcodec/h263dec : Reinitialize idct context if it has not been setup for the active profile
  The profile after reading headers can be different from when the context was initialized
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/h263dec.c

• Build error caused by missing library arc4random

  25 mai 2016, par Omega1001

  I’m currently working on a Streaming framework, and decided to use ffmpeg to encode and or decode my Video and or Audio.

  So i clicked through https://ffmpeg.org for the api files, and downloaded the statically linked version only to find out it actually contained a .exe (I use Windows in development, but plan on using Linux in production) instead of one or more dll’s and header informations.

  Since i don’t think i can use the ’exe’ as replacement for an dll, i cloned the git source, and tried to compile it myself.

  Then, while compiling i run into this error :

  CC  libavutil/random_seed.o
  
  libavutil/random_seed.c: In function 'av_get_random_seed':
  
  libavutil/random_seed.c:130:12: error: implicit declaration of function 'arc4random' [-Werror=implicit-function-declaration]
  
       return arc4random();
  
              ^
  
  cc1: some warnings being treated as errors
  
  common.mak:60: recipe for target 'libavutil/random_seed.o' failed
  
  make: *** [libavutil/random_seed.o] Error 1

  As far as I can tell, this means that I’m missing the library arc4random, so I started searching for this lib, and found absolutly nothing, besides the fact that this library is somehow Apple related..., but no dll’s and stuff or sources to compile it myself.

  I use cygwin and its GCC to compile on 64-Bit windows 7 Machine.

  Can anyone hint me to some location where I can get this missing library, or some other possibility to get ffmpeg as library into my project ?
  (I would prefer something I can link statically , since this project is meant to be a lib by itself)

  Maybe is there a way I can make use of that downloaded exe of ffmpeg, since i can borrow its headers from the source I cloned from Git ?

  Any Hint appreciated.

  Best Regards,

  Jannik Adam

• warning : shared library text segment is not shareable

  24 mars 2017, par S. Le Galloudec

  I explain my problem :

  My project is an android application using C++ with NDK.

  I have to include the library ffmpeg into my project.

  I’ve built ffmpeg with this tuto : https://github.com/WritingMinds/ffmpeg-android (I’ve looked at the script, it looks like it’s built for a static link)

  My cmakelist.txt is working, no error. But when i run my program, i got this message :
  (i’ve cut it or it’s too long)

  [1/1] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/x86/libgestionnaire.so

  /local/Android/Sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64/lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld : warning : shared library text segment is not shareable

  /local/Android/Sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64/lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld : error : treating warnings

  Best Regards