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• Adding FFmpeg library as dependency in Visual studio project to get rid of LNK2019 error

  13 mars 2019, par MSD Paul

  While compiling a project on Microsoft visual studio (to generate dll), I am getting the following linking errors (LNK2019)

  Severity Code Description Project File Line Suppression State
  Error LNK2019 unresolved external symbol av_strerror referenced in function "private : void __cdecl DecoderFFmpeg::printErrorMsg(int)" (?printErrorMsg@DecoderFFmpeg@@AEAAXH@Z)
  Severity Code Description Project File Line Suppression State
  Error LNK2019 unresolved external symbol av_get_channel_layout_nb_channels referenced in function "private : int __cdecl DecoderFFmpeg::initSwrContext(void)"

  several other functions like av_dict_set, av_dict_free, avcodec_decode2 which is related to the ffmpeg libraries. Can anyone please tell me how to properly add "ffmpeg" as dependenciesto this project and link it properly ?

• wmavoice : convert DCT-I/DST-I to lavu/tx

  4 août 2023, par Lynne

  wmavoice : convert DCT-I/DST-I to lavu/tx
  This is the very last user of any lavc transform code.
  This also *corrects* wmavoice decoding, as the previous DCT/DST
  
  transforms were incorrect, bringing it closer to Microsoft's
  
  own wmavoice decoder.
  

  • [DH] libavcodec/wmavoice.c
  • [DH] tests/fate/wma.mak

• XCode 5 is not linking Static Library to Cocoa Application

  4 septembre 2014, par aaronljx

  Basically I am building a Cocoa (OSX) application that uses some of the encoding/decoding libraries from ffmpeg (e.g. libavcodec.a, libavformat.a). For these libraries, I have explicitly configured it to be compiled as static library.. there were no dylibs created when I ran the make after configuring the package. Hence I am quite certain that these libraries would work as a static library.

  As usual I added these libraries to my xcode project via the Build Phases and Framework section. The .a files are there and when I build my project, there were no linking errors. Everything is fine and dandy until I run otool against the executable file of my application and realised that it needs the ffmpeg library dylibs to run. An attempt to run the application would fail since there is no dylib installed on my machine. If I run it on another machine that has ffmpeg installed (compiled with dynamic library) the application would work.

  Therefore, my question is, am I missing out on any of the configuration on the xcode part to instruct the linker to statically link those libraries that are used in my application ? (I remember when I develop C/C++ applications in Microsoft Visual Studio, all I need to do is to just add the static libraries (*.lib) files to my project’s linker settings and it will be automatically linked to my final assembly.)

  Thanks.