Mpeg Encoder Activation Premiere 6.5 Does Anybody Know A REALLY Good MPEG-4 Encoder?

Does anybody know a REALLY good MPEG-4 encoder? - mpeg encoder activation premiere 6.5

I am in an MPEG-4 encoder which works well, except when I encode a video clip of more than 10 minutes. I need an encoder for something that has no length or file size limitations. You see, please let me know.