[amsat-bb] sstv reception

Hi all!! Have been searching for a method of recording sstv in the field and post processing it at home. MMSSTV uses a .mmv format. It (the audio format)doesn't look well supported. I'd prefer something like .wav which is pretty plain jane.

Any ideas? Not married to MMSSTV, just the first one I'd found that was easy to use. Thanks, Norm