Qt WinRT App cannot access file permission denied

Question

I need to develop WinRT App using Qt and FFMPEG, I build the ffmpeg for WinRT based on the instruction here and I am able to link the library with my project. Now I need to ope

Answer 1

Try to add a file protocol to the manifest page, contains your file extension you want to access/ create or play with..

for example, .xml, .txt, .etc..

I always face this 'unknown' error when try to access files without adding the ext file protocol..

UPDATE: More Information: https://msdn.microsoft.com/library/windows/apps/hh464906.aspx#file_activation

Do it by: Package.appxmanifest > Declarations > Add a 'File Type Association' > your type name and ext. is required.

Example in a code:

  <Extensions>
    <uap:Extension Category="windows.fileTypeAssociation">
      <uap:FileTypeAssociation Name="myfile">
        <uap:SupportedFileTypes>
          <uap:FileType>.config</uap:FileType>
        </uap:SupportedFileTypes>
      </uap:FileTypeAssociation>
    </uap:Extension>
  </Extensions> 

Change 'myfile' and '.config'

Good luck!