help; jp2 & h.264

this maybe easy to some.. i'd like to know how to view images or files that are in jp2 format or has the extension .jp2? what application do i need to view it?

for h.264 & other newer or higher video codec or format, what do i use to convert h.264 video files (or other new video format) to mpeg or to vcd? i like to convert & burn them into vcd or dvd & play it on my external vcd player. i tried many application to convert but nothing seems to work.

i use k-lite codec pack. i have no problem viewing any video file sofar. the problem comes when i try to convert video files that are in h.264.