OK... so, I got the following from a security camera company, but I'm lost on converting NEC to HEX.  Aren't I missing a few digits here?  Can anyone make out the Chinese on the side - does that give more info what to do?

I get the 00FF side... but what would the last 4 be for each key?

[Link: imgur.com]

According to google translate. The blue words are...

"This key value from the original [80] to [94]"

KOT

Might they be the decimal numbers on the buttons, expressed in hex? That would be four digits, right?

You can use IrScrutinizer to compute the NEC signals. Use its "Generate" pane, select nec1 as protocol, fill in 0 for D, leave S empty (alternatively, 0xFF), and fill in the key code as F, prefixed by "0x", (for example, "0x9E" for the "Enter" button, and press "Generate". Probably...

For example, the enter button will be

0000 006C 0022 0002 015B 00AD 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 05F7 015B 0057 0016 0E6C


What "last 4"?

I was thinking of only 32 bit - didn't even think of 16. Been out of this game for years :)

Converted to hex using yamaha's little program. Codes were like 00FF 88 for search. Programmed into my RTI and worked like a charm - I was expecting something like 00FF 88??.