def add_clip(self, clip_path, start_time, duration):
clip_uri = Gst.filename_to_uri(clip_path)
asset = GES.UriClipAsset.request_sync(clip_uri)
def add_clip(self, clip_path, start_time, duration):
clip_uri = Gst.filename_to_uri(clip_path)
asset = GES.UriClipAsset.request_sync(clip_uri)