Gabest MP4 splitter. MP4 files are often in H264 format and best decoder is CoreAVC (not free though). Audio is often AAC and good decoder for that is CoreAAC.
http://www.free-codecs.com/download/MP4_Splitter.htm http://www.coreavc.com/ http://www.free-codecs.com/download/...how_filter.htm
So install those 3 decoders/splitters and you will be able to play MP4 and MOV files just fine with BSPlayer.
Note: You can also use FFDShow to decode H264 video and AAC audio.