Tyffmpeg
From DVRpedia
DealDatabase Download & Development Thread: ffmpeg with MPEG to TY+ encoding
DealDatabase Support Thread: Support of ffmpeg with MPEG to TY+ encoding
Most updated stable patched version is 1.7 (as of Feb '08) found in the development thread here: ffmpeg-diffs-1.7 (Windows version can be found 2 posts below.)
Batch files found in the support thread which can be used to encode multiple videos located in the same folder: tyffmpeg batch file
