commonproperties.insert("force_aspect_den", "-");
commonproperties.insert("force_fps", "-");
commonproperties.insert("force_progressive", "-");
+ commonproperties.insert("force_tff", "-");
commonproperties.insert("threads", "-");
commonproperties.insert("video_index", "-");
commonproperties.insert("audio_index", "-");