Hi.

It look more like a byteorder (big endian versus little endian) problem to me. But the effect is pretty much the same. Look at this:

Packed 4 pixels/Byte:

AABB CCDD

Decode on empeg:

00AA 00BB  00CC 00DD

Decode on PC (without reversing byteorder)

00CC 00DD  00AA 00BB

If you reverse the byte order on the PC, or swap the nibbles (hi/low 4 bit) in the packed byte, you will get the correct result.

cu,
sven