2 x 720p AVI with DTS - need 1 x 720p MKV with AC3

[snadge]

Hi

I have 2 x 720p AVI's with DTS 5.1 Audio (this is one film split into two AVI's)

I would like to convert them into 720p MKV , AVI or MP4 (whichever yields best results/quicker?) with AC3 Audio and if I could I would like them merged into one file instead of two halves...

can anyone suggest a guide for this? I have the following programs:
Handbrake
WinAVI Video Converter
K-Lite Codec Pack Full
Heartware MKV Audio Converter
Make MKV


THANKS

[Baldrick]

I would use avidemux to join, open first avi, append the other, under video and audio use copy mode, save as a mkv. Then use popcorn mkv audio converter to make the audio ac3 in the mkv.

[snadge]

thanks baldrick....