DirectShow filter用於NAXA NX-142 4GB Video Player

[Henry]

我剛有個NAXA NX-142 4GB, 幾好, 不過Video方面有些不明. (它不是電話, 而是一個可聽歌, 看相, 讀書, 錄音, 聽FM收音機, 及看戲或看短片的 2" X 2" X 1/4" 的小小小電腦)
http://www.jujudeals.com/mp3-video-play ... -p-11.html

根據說明書以下所講的DirectShow filter是甚麼?
是否Microsoft DirectX 9.0 與DirectShow filter齊安裝後才能利用AMV Converter轉換Real Media, QuickTime and MPEG2到AMV?
究竟AMV又是甚麼東西?
請問各位前輩何處可免費下載Microsoft DirectX 9.0 與DirectShow filter?

部份說明書如下:
For AMV Converter, please make sure you have installed Microsoft DirectX 9.0 or above. When to convert Real Media, QuickTime, MPEG2 format video files, please install related DirectShow filter at first. Otherwise, AMV Converter can not work normally.

[hammer]

[Henry]