[IOS] Compilation and use of the FFmpeg framework on the iOS platform

Use environment

• Mac OS Yosemite 10.10.5

Development tools

• Xcode 7.0

• Terminal

Required file Links

• Gas-preprocessor
• Yasm
• Ffmpeg-ios-build-script
• ffmpeg-2.8
• Kxmovie

Compiling the FFmpeg static library for iOS platforms

• Open Terminal Terminal to the downloaded gas-preprocessor folder

  • Place in folder gas-preprocessor.pl file Copy to /usr/sbin/ directory

  • Modify /usr/sbin/gas-preprocessor.pl The file permissions are executable permissions

     chmod 777 /usr/sbin/gas-preprocessor.pl     

• FFmpeg-iOS-build-script-masterin the Execution folderbuild-ffmpeg.sh

  • Compile all versions arm64 , armv7 x86_64 static libraries

    ./build-ffmpeg.sh

  • Compiling arm64 a static library that supports schemas

    ./build-ffmpeg.sh arm64

  • Compiling armv7 x86_64(64-bit simulator) a static library for and

    ./build-ffmpeg.sh armv7 x86_64

  • Compiling a merged version

    ./build-ffmpeg.sh lipo

Issues encountered in compiling static libraries

• yasm is not installed

  • Solution 1

    • Go to the downloaded yasm folder by Compile and install the command yasm

      /configure && make-j 4 && sudo make install     

  • Solution 2

    • Use homebrew Package Manager for installation

      Pre class= "Hljs mipsasm" > brew install Yasm

  • Test for installation successful

     yasm Span class= "hljs-comment" >--verision   

• c test failedThe situation

  • xcodeToo many environments installed, using xcode-select the default tool path selection/Applications/Xcode-beta.app

      sudo xcode-select -s /Applications/Xcode-beta.app

Using the compile-completed FFmpegStatic Library

• Once the compilation is successful, you can bring the Ffmpeg-ios folder (including include and Lib) into Xcode

• Join the Dependent library Libz.lib

• Join the Dependent library Libbz2.lib

• Join the Dependent library Libiconv.lib

• If there is a compilation error, the link file does not exist

    修改Build Setting   Header Search Paths = $(SRCROOT)/LOFFmpegSample/FFmpeg-iOS/include

Working with Frames kxmoviePlay Video

NSString *path = @""; Nsmutabledictionary *Parameters = [Nsmutabledictionarydictionary]; //increase buffering for. wmv, it solves problem with delaying audio frames if ([Path.pathextension Isequaltos tring:@"wmv"]) parameters[kxmovieparameterminbufferedduration] = @ (5.0); //Disable deinterlacing for IPhone, because it ' s complex operation can cause stuttering if (Ui_user_interface_idi OM () = = Uiuserinterfaceidiomphone) parameters[kxmovieparameterdisabledeinterlacing] = @ (YES); Kxmovieviewcontroller *VC = [Kxmovieviewcontroller movieviewcontrollerwithcontentpath:path parameters:  Parameters]; [Self PRESENTVIEWCONTROLLER:VC animated:YES Completion:nil];          

Example Project:
Loffmpeg

Compilation and use of the IOS]FFMPEG framework on the IOS platform