M4p files not playing audio on iPod

Recently I have tried to convert mpeg files so that I may play them on my iPod video. It really has not worked out for me though. I am using quicktime pro to convert the video but as soon as I put the video on my iPod there is no sound. I am using all the updated versions on iTunes and Quicktime but the problem is not going away. Can anybody help? Thank you.

Quicktime or Quicktime Pro (which iTunes uses) don't convert "muxed" ( muxed means multiplexed where the audio and video are stored on the same track) video files properly. It only plays the video and not the audio.
See:iPod plays video but not audio.
You need a 3rd party converter to convert the file with both audio and video.
See this for help: Guide to converting video for iPod (Mac/Windows).

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