I've developed an application that detects, captures and encodes MAME and MESS title video sequences and I currently have two modern quad core systems burning through creation of a MAME set.

They will be available to all subscribers in a few days.

The captures are at the original game resolution with the display aspect ratio set to 4:3 or 3:4.

All videos are 60 fps using a custom version of MAME fixing all refresh rates to 60hz.

The videos should be suitable for most front ends including GameEx and PinballX.

Here are some samples.