[Q] How to Unyaff2 a yaffs2 file system: 4K 24bits/1K file

Hai i have a system.img from a android media player and i want to unyaff the file

I tried every possible unyaff i could find and none did the job

The header int he file says

YFSS!V10 # ‚
yaffs2 file system: 4K 24bits/1K
mkyaffs2image version: Linux-3.0.8 Nand Controller V504, build time: Mon Dec 3 10:19:42 2012
.

Can please somone help me with a working unyaff program.source ?

Here is the link to the firmware https://mega.co.nz/#!KMkHVTCR!XSLG0g...WIQpy5SmUGAcbk