Creating a skip videos code - basic method (PS2)

[dlevere]

By Nachbrenner

Credits to CMX and bongsan for the original idea

Load your game's ELF into PS2DIS.
Search the hex string:

4000838c0800e0030000628c

The disassembler should jump to:

sceMpegIsEnd:
lw v1, $0040(a0) :8c830040
jr ra :03e00008
lw v0, $0000(v1) :8c620000

change the third line into:

addiu v0, zero, $0001  :24020001

Add a line into your patch file like this:

//Skip Videos
patch=0,EE,0xxxxxxx,word,24020001

If you have a game that has more than one ELF - e.g. the demo disc PBPX_955.06 (comes with your PS2) - then you should load the game's ISO file into a hex editor.

Search the hex string:

4000838c0800e0030000628c

and replace with:

4000838c0800e00301000224

You find that about a dozen times with demo disc PBPX_955.06

This method will not work with all games!

How to spot if patching "sceMpegIsEnd" fails
If your games freezes on playing videos in spite of using the standard patch, open debugger and take a look at the disassembly.
Most likely you will see code like this:

LUI 1000

OR 2000 -> IPU_CMD

OR 2010 -> IPU_CTRL

OR 2020 -> IPU_BP

OR 2030 -> IPU_TOP