A little update:
I added functionality to import various video-formats. If input file is not MKV, uncropMKV will use mkvmerge to generate a MKV and will process it.
Example:
1) I loaded AVI file (
XVID 624x352 23.98fps) with MP3 audio
2) Set resize option to 720x480 (16:9 anamorphic)
3) Clicked Queue and then Start
4) Took the output (-uncropped.mkv) file and loaded it into multiAVCHD
5) multiAVCHD converted the MP3 audio to AC3
6) ...and I got a nice AVCHD folder with my AVI video
I also tested it with MP4 and MOV.
*** edit: there are some audio sync problems if original audio is not AC3/DTS/PCM/WAV but I'll find a solution. It works with CBR mp3/mp2 audio.