Program to compare encodes

[Insane2986]

How can I compare individual frames of my DVD encodes? I know I can open each DVD, scan to a frame, and save it, but that takes forever. What I'd prefer is something with 2 separate windows (like virtualdubmod)

Anyone know of something like this?

[Insane2986]

is there anything even remotely like this? :(

[CruNcher]

avisynth :)
stackvertical(a,b)

[Insane2986]

I created an avs file with

clip1 = DirectShowSource("I:\OUTPUT\HC Encoder\VIDEO_TS\VTS_01_1.VOB")
clip2 = DirectShowSource("I:\OUTPUT\QMatOp 6 Pass\VIDEO_TS\VTS_01_1.VOB")
StackVertical(clip1, clip2)
but when I open the file in virtualdub, the two encodes are out of sync so their frames don't match up :(

also, is there any way to make these videos fullscreen so I can notice differences easier?

[Haze_NZ]

Use Media Player Classic and then press Alt+Enter.