Recherche avancée

Sur d’autres sites (10782)

• Compiling FFMpeg libraries for Visual Studio

  20 janvier 2015, par LostBoy

  I’m trying to use the FFMpeg libraries in a Windows application. I use MingW-w64 to compile FFMpeg with static libraries with architecture once with x86 and once with x86_64.
  Currently I’m trying to link the 32bit x86 libraries with my VS2008 application.
  The libraries are added to the library path and VS does not complain about being unable to load a .a file.

  However I get several uneresolved symbol errors like
  ait_rtp_receiver.lib(ait_decoder_lib.obj) : error LNK2001 : unresolved external symbol _av_free

  I import the FFMpeg header files as extern C and I can see the symbols in the .a without the leading underscore.
  What can I do to make the name decoration of Mingw-w64’s gcc and of the VS compiler suite compatible ?

• Anything Wrong with (char[32]){0} in Visual Studio 2012 ?

  5 juillet 2014, par loppp

  ===== background ====

  This problem originates from using fFmpeg lib sample muxing.c in visual studio 2012, I found the the error :

  error C2143: Syntax error missing ) before {

  at

  printf("pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n",
  
      av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base),
  
      av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base),
  
      av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base),
  
      pkt->stream_index);    

  and I found

  #define AV_TS_MAX_STRING_SIZE 32
  
  #define av_ts2str(ts) av_ts_make_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts)

  for eliminate irrelevant statement, I just replace the big printf with

  printf("pts:%s \n",
  
      (char[32]){0}
  
      );

  but the error still the same, looks the error is from

  (char[32]){0}

  ===== question ====

  As this sample source file muxing.c is official one (I think), might not possibly wrong, so is the statement wrong or not compatible with VS compiler ? or I am missing something here ?

• Live feed from drone to smartphone in Android Visual Studio

  13 mai 2016, par Sam van Dijk

  I am working with Android(monodroid) in Visual Studio with Xamarin for a project to fly a drone with a virtual reality goggle. I am trying to make a live feed from my AR Drone 2.0 to my Android smartphone. I have the code to make it work, but I can’t use the FFmpeg libraries I have for Android. I have no idea why I can’t use these libraries.

  I have searched on the internet for a solution, but nothing is working. I’ve searched for builds to build my own libraries and searched for already builded libraries.

  Is there a simple way to get FFmpeg Android libraries to use for my project ?