When Qt is built statically with a static version of FFmpeg, when building an app it does not to link correctly with FFmpeg libs, being impossible to build an app without modifying the Makefile manually.

```

ld: library 'libavformat.a' not found

which is caused by this:
/Users/nsantos/Qt/6.8.4/macos_static/lib/libQt6FFmpegMediaPluginImpl.a -framework VideoToolbox -llibavformat.a -llibavcodec.a -llibswresample.a -llibswscale.a -llibavutil.a

```

Since this is in the generated .prf files, I believe this use case hasn't been fully tested.

In order to reproduce, build Qt statically and provide a static build of FFmpeg, then try to build the attached example.