html--Part MP4 cannot be played on Google Chrome

The Chrome browser supports HTML5, which supports the native playback portion of the MP4 format (without the use of plugins such as Flash).

Why part of the MP4? MP4 has a very complex meaning (see HTTP://EN.WIKIPEDIA.ORG/WIKI/MP4), and the common man's understanding of MP4 is the suffix. mp4 file. But MP4 itself is not a simple video format, it is a shell that wraps video and audio formats. As for the inside of the video and audio use what encoding format is variable. MP4 video formats can also be used with DivX h264,chrome only support H264.

Why doesn't chrome support all video encoding formats? Most of the video encoding format is to pay royalties, Google has bought a single for H264, Firefox does not have the money to buy Google so

How to solve this problem, I use the way to convert the encoding format in the format factory, in the MP4 conversion, output configuration--Format encoding--select AVC (H264)

html--Part MP4 cannot be played on Google Chrome