Why can I apply the inverse telecine filter to my content?
The inverse telecine process removes frames that were added during the telecine process. (The telecine process is used to convert 24-fps film to 29.97 or 30-fps NTSC video.) The inverse telecine filter removes artifacts and improves the quality of encoded content, especially at low bit rates. You can apply the inverse telecine filter to an NTSC source that was previously telecined. It is not possible to apply the inverse telecine filter when you are also applying time compression or preserving or creating a time code.