Tips

• Using Space Character In Command String

  execute method in MobileFFmpeg API is overloaded and has an optional delimiter parameter. Delimiter defines how a command string will be split into arguments. When a delimiter is not specified then space character is used as default delimiter. Therefore if you have a space character in one of your command arguments, in filename or in -filter_complex block, then your command string will be split into invalid arguments and execution will fail.

  Unfortunately, quotation marks are not supported by MobileFFmpeg. You can not use them to define arguments, so they won't help you on fixing this.

  You have two options:

  1. You can split your command string into array yourself and call appropriate execute method:

     Android: int execute(String[] arguments)

     IOS: (int)executeWithArguments: (NSArray*)arguments

  2. Or use a different delimiter character in your command call execute by specifying it.

     Android: FFmpeg.execute("-i~file1.mp4~-c:v~mpeg4~file2.mp4", "~");

     IOS: [MobileFFmpeg execute: @"-i~file1.mp4~-c:v~mpeg4~file2.mp4", @"~"];

• Depending Another Library Containing libc++_shared.so

  MobileFFmpeg packages specified in Android c++ dependency guide include libc++_shared.so library. If a second library which also includes libc++_shared.so is added as a dependency, gradle fails with More than one file was found with OS independent path 'lib/x86/libc++_shared.so' error message.

  You can fix this error by adding the following block into your build.gradle.

  android {
      packagingOptions {
          pickFirst 'lib/x86/libc++_shared.so'
          pickFirst 'lib/x86_64/libc++_shared.so'
          pickFirst 'lib/armeabi-v7a/libc++_shared.so'
          pickFirst 'lib/arm64-v8a/libc++_shared.so'
      }
  }