- Transform a filename into a URI like that:
Use g_filename_to_uri() instead. Same goes for the opposite direction, where stripping "file://" isn't good enough to transform a URI into a local filename. Use g_filename_from_uri(), or g_file_get_path() if you're actually going to be opening the files.
- Use GStreamer to play a single small pop sound:
Bruno, you should get a Bugzilla component for Garfunkel.