AVI to MP4 made video huge, how to revert?

I had a 700mb movie file and I decided to convert it to mp4. I used isquint and had it set up for the Tv with maxiumum quality (stayed the same as in the first place) using h.264 or whatever it is. I dont have the original file as I thought the file size was not gonna be changed after converting. Is there any way to revert my movie files back to 700MB avi without losing any quality?

Unlikely to do it unless the avi is using all mp4 codecs and just needs repackaging.
MPEGStreamclip is possible. Try "save as" and see if it works. If not you may be able to get by with just converting one of the components and passing through the other if it is a mp4 variant.
Use Media Info - http://mediainfo.sourceforge.net - to get details of codecs used in multimedia.
Many AVIs use mp3 as an audio codec so that one at least will need converting.
If you end up having to convert, some use Handbrake.

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null

Thanks for replying guys.
I tried what you suggested Ricktoronto on a small test file and it worked!
You've made my day, been trying for a couple of days to get this to work.
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AVI to MP4 made video huge, how to revert?

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