[Mp4-tech] what the opensource about mpeg-4' encoder and decoder

[tim huang]

	hi ..all
	i am studying mpeg-4,and i want to find some opensource to use.
	i search from internet,and find the opensource about mpeg-4 are below:
	mpegip, hdoc264,gpac,ffmpeg,xvid
	in these opensource, mpegip have full function include encoding,decoding,transform, but it used xvid not the standant of MPEG-4;hdoc264 only include decoding and encoding, gpac is only include system fuction.
	if i want to  write a full decoder and encouder like realplay and realproduce,an they used MPEG-4 visual  iso/iec 14496-2 or h.264, how can i make use of opensource?
	and how are you use the vm provided by mpeg(MoMuSys and microsoft)? can i word base on it.
	i didn't know how can i start, please help me.
	thanks in advance.
	tim.huang