After searching the internet I found the following blog that seems to address this issue. I haven’t tried to install the recommended application yet but will tonight.
HOWTO: Play MPEG VX Movies on Your Sansa e200
I have a Sony DSC-H5 camera, which does nice (640×480) videos, in MPEG VX format. I recently got a Sansa e250 MP3 player that also does video. So, of course, I wanted to be able to load my home movies onto it.
But when I tried converting a movie from my camera (using the convertor software supplied with the Sansa), the movie did not have any sound.
After discussing the matter with Sandisk tech support (polite, fast, and generally helpful), the answer that I ended up with was “that video format is not supported”. Hmm. Not very good.
After a bit of Googling, though, I found an answer. The Videora iPod Convertor converts most video formats to MOV (the format used by both the iPod Video and the Sansa). Running the output file through the Sansa Media Convertor gives you a movie that DOES have sound.