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• Updated license link and added package information.

  15 décembre 2011, par Sebastian Tschan

  .gitignore m README.md m application.js m gae-go/app/main.go m gae-python/main.py m index.html m jquery.fileupload-ui.css m jquery.fileupload-ui.js m jquery.fileupload.js m jquery.iframe-transport.js m jquery.postmessage-transport.js m jquery.xdr-transport.js + package.json m php/index.php m (...)

• Unable to link QtFFmpegWrapper sample on Win7 with VS 2012

  20 juillet 2014, par mschwarz

  I am trying to incorporate QtFFmpegWrapper in my program, but both my program and the provided sample won’t link with ffmpeg :

  QVideoEncoder.obj:-1: Error: LNK2019: unresolved external symbol _avcodec_init referenced in function "protected: bool __thiscall QVideoEncoder::initCodec(void)" (?initCodec@QVideoEncoder@@IAE_NXZ)
  
  QVideoDecoder.obj:-1: Error: LNK2001: unresolved external symbol _avcodec_init
  
  QVideoEncoder.obj:-1: Error: LNK2019: unresolved external symbol _avcodec_thread_init referenced in function "public: bool __thiscall QVideoEncoder::createFile(class QString,unsigned int,unsigned int,unsigned int,unsigned int,unsigned int)" (?createFile@QVideoEncoder@@QAE_NVQString@@IIIII@Z)
  
  QVideoEncoder.obj:-1: Error: LNK2019: unresolved external symbol _avcodec_open referenced in function "public: bool __thiscall QVideoEncoder::createFile(class QString,unsigned int,unsigned int,unsigned int,unsigned int,unsigned int)" (?createFile@QVideoEncoder@@QAE_NVQString@@IIIII@Z)

  and 10 or so more like these ...

  Why do these pop up when linking ? The libs are all there and found, it just seems like the linker has issues with them ...

  I use the following setup for my project :

  • Latest QtFFmpegWrapper from https://code.google.com/p/qtffmpegwrapper/
  • qt-opensource-windows-x86-msvc2012_opengl-5.3.0
  • Visual Studio 2012 Professional
  • Qt Creator 3.1.2
  • ffmpeg builds from http://ffmpeg.zeranoe.com/builds/ :
  • ffmpeg-20140717-git-fa6716c-win32-dev
  • ffmpeg-20140717-git-fa6716c-win32-shared

  Everything is 32Bit.

• link error Xcode libx264.a ARM

  19 novembre 2013, par user1558688

  I'm trying to build libx264.a to run on my iphone 4s ( running iOS 6.1.3 )

  I'm building it using the MACOSX 10.9 Terminal application :

  CC=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang ./configure 
  
  --host=arm-apple-darwin 
  
  --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk 
  
  --prefix=armv7 
  
  --extra-cflags='-no-integrated-as -arch armv7' 
  
  --extra-ldflags="-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/lib/system -arch armv7" 
  
  --enable-pic --enable-static

  Which guives me the output :

  platform:      ARM
  
  system:        MACOSX
  
  cli:           yes
  
  libx264:       internal
  
  shared:        no
  
  static:        yes
  
  asm:           yes
  
  interlaced:    yes
  
  avs:           avxsynth
  
  lavf:          no
  
  ffms:          no
  
  mp4:           no
  
  gpl:           yes
  
  thread:        posix
  
  opencl:        yes
  
  filters:       crop select_every 
  
  debug:         no
  
  gprof:         no
  
  strip:         no
  
  PIC:           yes
  
  bit depth:     8
  
  chroma format: all

  Then I run 'make' and it generates a libx264.a archive.

  So far, so good.

  On my Xcode (Version 5.0.2 (5A3005)) application I set :

  1) Build Settings -> Header Search Path -> x264 parent directory (../x264 )
  2) Build Phases -> Link Library with Binaries -> Add Other... ( ../x264/libx264.a )
  3) Build Settings -> Other Linker Flags : -ObjC

  In my AppDelegate.mm :

  #import "AppDelegate.h"
  
  #import "x264.h"
  
  
  
  @implementation AppDelegate
  
  
  
  - (BOOL)application:(UIApplication *)application 
  
  didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  
  {    
  
      x264_param_t x264param;
  
      x264_param_default(&x264param);
  
  
  
      // Override point for customization after application launch.
  
      return YES;
  
  }
  
  
  
  ...

  When i try to run it on the device I get the error :

  Undefined symbols for architecture armv7:
  
    "x264_param_default(x264_param_t*)", referenced from:
  
    -[AppDelegate application:didFinishLaunchingWithOptions:] in AppDelegate.o
  
  ld: symbol(s) not found for architecture armv7
  
  clang: error: linker command failed with exit code 1 
  
  (use -v to see invocation)

  Here is the command invoked by xcode :

  Ld /Users/danieldantas/Library/Developer/Xcode/DerivedData/testingCpp-bvawshyhjcybwvadwwwjqxuomjts/Build/Products/Debug-iphoneos/testingCpp.app/testingCpp normal armv7
  
  cd /Users/danieldantas/Desktop/projects/testingCpp
  
  setenv IPHONEOS_DEPLOYMENT_TARGET 6.0
  
  setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
  
  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch armv7 -isysroot 
  
  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk 
  
  -L/Users/danieldantas/Library/Developer/Xcode/DerivedData/testingCpp-bvawshyhjcybwvadwwwjqxuomjts/Build/Products/Debug-iphoneos 
  
  -L/Users/danieldantas/Desktop/projects/testingCpp -L/Users/danieldantas/Desktop/projects/x264 
  
  -F/Users/danieldantas/Library/Developer/Xcode/DerivedData/testingCpp-bvawshyhjcybwvadwwwjqxuomjts/Build/Products/Debug-iphoneos 
  
  -filelist /Users/danieldantas/Library/Developer/Xcode/DerivedData/testingCpp-bvawshyhjcybwvadwwwjqxuomjts/Build/Intermediates/testingCpp.build/Debug-iphoneos/testingCpp.build/Objects-normal/armv7/testingCpp.LinkFileList 
  
  -dead_strip -ObjC -stdlib=libc++ -fobjc-arc -fobjc-link-runtime -miphoneos-version-min=6.0 -lx264 -framework CoreGraphics -framework UIKit -framework Foundation -Xlinker -dependency_info -Xlinker 
  
  /Users/danieldantas/Library/Developer/Xcode/DerivedData/testingCpp-bvawshyhjcybwvadwwwjqxuomjts/Build/Intermediates/testingCpp.build/Debug-iphoneos/testingCpp.build/Objects-normal/armv7/testingCpp_dependency_info.dat -o 
  
  /Users/danieldantas/Library/Developer/Xcode/DerivedData/testingCpp-bvawshyhjcybwvadwwwjqxuomjts/Build/Products/Debug-iphoneos/testingCpp.app/testingCpp

  Any idea how to fix this ?

  Thanks