I am running windows 7 and adobe premiere 6. I have a few .mts files recorded using a panasonic hmc camcorder. These videos played fine with sound on the computer. But once they are imported into premiere, there is no audio, in fact the track is missing. Does premiere not support .mts files? Is there a way to convert them into a format supported by premiere?
Is the audio recorded as multi-channel? Is it PCM or Dolby? Try importing clips from the camera that have stereo audio. If it turns out that multi-channel audio is the problem, load the clip into Audition (if you have it) and process it there. If you don't have Audition you could try the open-source program Audacity, but I don't know how well or even if it supports multi-channel audio.
I did more research and found out that it is a known problem using premiere 6. The easiest work around is to extract the audio using a third party program and import it seperately. Fortunately I only have 10 30min clip to go through so it only took 4-5 hours to get all the audios out.