Exporting from .mpeg to .mov file loses sound

Okays so I know that there are numerous forum discussions out there on this topic but none helped me figure out my problem so I decided to create my own.
I'm trying to take a xxx.mpeg file and convert it to a smaller xxx_web.mov file that I can use for posting on the web and sending to friends easily over ichat. To get my mpeg file I:
1. used mac-the-ripper to get the Video_TS folder from a DVD with now encryption.
2. then I took that .VOB file from that and drug it into MPEG Streamclip to convert the .VOB file to an xxx.mpeg.
All is well up till this point and xxx.mpeg plays fine with sound. Next I tried to use quicktime pro to export my xxx.mpeg file to xxx_web.mov. This gave me video with now sound
Then I read about mpegs being muxed and I needed to demux them. So I used MPEG Streamclip to demux xxx.mpeg with the following option from MPEG Streamclip:
DEMUX to M2V and AIFF.
This worked succussfully as well with the M2V file playing normally in quicktime with sound. I then tried to export the M2V file to a .mov file and got the same outcome...video but no sound.
Can someone walk me through what I'm doing wrong? Also I just started using MPEG Streamclip can it do everything i'm trying to do (meaning can I bypass using quicktime pro)?
Thank you.

1. used mac-the-ripper to get the Video_TS folder from a DVD with now encryption.
If the source DVD is not encrypted, then the VIDEO_TS folder or desired non-zero title VOB series can be copied directly to your hard drive without the use of MTR.
2. then I took that .VOB file from that and drug it into MPEG Streamclip to convert the .VOB file to an xxx.mpeg... I'm trying to take a xxx.mpeg file and convert it to a smaller xxx_web.mov file that I can use for posting on the web and sending to friends easily over ichat.
If you goal is to create a small, web compatible file, you should convert to your final target compression format while in MPEG Streamclip. Most Apple applications use the H.264/AAC compression format for posting to web sites since it generally produces the smallest file for a given level of quality. For instance, selecting the "Export to MPEG-4..." option in MPEG Streamclip, pressing the "iTunes" button, and then selecting an appropriate size/aspect combination will automatically load user settings to create your final file. The 640x480 or 640x360 iTunes option will produce a file similar to the iTunes option in QT Pro (or iTunes) but will also retain your audio.
All is well up till this point and xxx.mpeg plays fine with sound. Next I tried to use quicktime pro to export my xxx.mpeg file to xxx_web.mov. This gave me video with now sound
QT Pro does not fully support multiplexed MPEG compression formats. An MPEG (MPEG2/MP2) compression format will play in the QT player with the QT MPEG-2 Playback component installed but cannot be edited or converted and retain the audio. To retain the audio, you must use a third-party, MPEG-based conversion application like MPEG Streamclip.
Then I read about mpegs being muxed and I needed to demux them. So I used MPEG Streamclip to demux xxx.mpeg with the following option from MPEG Streamclip:
DEMUX to M2V and AIFF.
This work flow creates two elementary stream files. Both the M2V (with MPEG-2 component installed) and the AIFF file are QT Pro compatible. However, they must always be stored together on your hard drive. Since the M2V video file "resources" the AIFF audio in a separate file, if the files are separated, this reference will be orphaned and, as you have seen, you again end up losing your audio.
I just started using MPEG Streamclip can it do everything i'm trying to do (meaning can I bypass using quicktime pro)?... Can someone walk me through what I'm doing wrong?
Already covered. (See above.)
If I export to any format (QuickTime movie, AVI, Windows Media, MPEG-4), all of the audio options are greyed out. Some say explicitly that there is no audio in the source movie. If I go ahead, I get a file with no audio.
The "Save" and "Save As..." options do not convert the compression format. They merely take the data (which you already said plays correctly) and places it in an MOV file container where it continues to play correctly. On the other hand, when you attempt to convert the file to other compression formats (i.e., change the data within the container), then you lose the audio. As indicated above, multiplexed formats like MPEG-2 video with MPEG-1 layer 2 audio are playback only compatible with the QT structure. If you wish to convert the data to a different format and retain the audio, use a third-party, MPEG-based application.
QuickTime is obviously able to decode the .m1a audio since it can play it. Why does it seem to not be aware the audio is there if I try to export it?
Because QT is based on a multi-track engine that synchronizes audio and video frames with reference to external clocking. On the other hand, multiplexed content divides the audio and video into interspersed blocks of data synchronized spatially within a single data stream. QT could theoretically create two separate streams of data but has no way of synchronizing any single frame of audio with its video frame counterpart. The MPEG Streamclip engine can do this but requires the QT MPEG-2 Playback component to then bridge the gap between spatial and temporal based playback engines. Without this temporal relationship the QT player would probably return the infamous "Not a movie" message.

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I took a test file, placed it into Compressor, and applied the DV/NTSC setting to it (yes, I know, the same setting the file already had). After re-encoding (which took very little time), the file was perfectly executable in QuickTime X - both Audio and video showing as to be expected, and no real difference in quality (not that VHS source is quality to begin with).
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Exporting from .mpeg to .mov file loses sound

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