mp4mux和mp4demux filter

已经封装成dshow filter，可以直接使用，支持H264+PCM或AAC。没有使用mp4v2库，不需要加载第三方dll // Implementation of classes for DirectShow MPEG-4 Multiplexor filter // mp4mux.cpp : Defines the entry point for the DLL 

mp4demux
.gitignore
DemuxFilter.cpp
DemuxFilter.h
ElemType.cpp
ElemType.h
Index.cpp
Index.h
mp4demux.cpp
mp4demux.def
mp4demux.rc
mp4demux.sln
mp4demux.suo
mp4demux.vcproj
mp4demux.vcxproj
Mpeg4.cpp
Mpeg4.h
resource.h
smartptr.h
StdAfx.cpp
StdAfx.h
thread.h
UpgradeLog.XML
mp4mux
alloc.cpp
alloc.h
logger.h
MovieWriter.cpp
MovieWriter.h
mp4mux.cpp
mp4mux.def
mp4mux.rc
mp4mux.sln
mp4mux.suo
mp4mux.vcproj
MuxFilter.cpp
MuxFilter.h
NALUnit.cpp
NALUnit.h
ParseBuffer.cpp
ParseBuffer.h
resource.h
smartptr.h
StdAfx.cpp
StdAfx.h
TypeHandler.cpp
TypeHandler.h