No sound when converting

When I try to make a atv version of a video or movie, I get the video but I don't get any sound.
I guess i'm doing it right. I select the video I want to convert, select the advance tap , click on "create apple tv version" and it goes through its process and creates another video , but has no sound when played on my atv or computer.
Can any one help?

Welcome to the  Discussion Forums
Yes you are doing this right, but I suspect your source video is not of the correct compression type to be compatible with quicktime (which itunes uses for conversion).
Quicktime cannot convert muxed video and audio, although it can play it. Such compression types are mpeg1 and mpeg2. You can use a third party converter such as mpegstreamclip to make these conversions, but you will need the Quicktime mpeg2 playback component if your source video is mpeg2.

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