Noob questions: This ECM prefilter tested from very old/older game files (like: textures, audio, any formats) compressions? Use before any precompressors or before srep+lzma/lolz compressions? Yes, the filter optimized this CD-image files compression.
https://encode.su/threads/2829-RAZOR...ll=1#post54307
https://encode.su/threads/2829-RAZOR...ll=1#post54336