Default [Q] Q: how to edit android boot animation

Hi,
I'm trying to figure out the format of this boot animation file that is used in those cheap android tablets (Eken M00X etc)
Boot animation is writen to flash during update via uboot scriptcmdfile:

fatload mmc 0 0 script/logo.data
nand write 0 b80000 $(filesize)
textout -1 -1 "Upgraded logo successful!" ff00

and it's called later via bootcmd parameter:
setenv bootcmd 'nand read 7f80000 b80000 80000;nand read 0 0 300000;bootm 0'

the trouble is that I can't figure out what kind of file this is, I dont think it can be flash animation and it's (as far as I can say) not in the same format that i.e nexus boot animation is.
Attached Files
File Type: zip logo.zip - [Click for QR Code] (156.1 KB, 68 views)