Export from avi to mpeg-4

i have a vado hd and i try to see the movies on imovie .
when i export the movie in quicktime pro from avi to mpeg-4 the quality of the movie
just drops .
what do i do wrong ?
is there a better way to do this?
thanks

I suspect your mpeg-4 bitrates are too high.
Files need to conform to the following specs:
===========================================================
Video formats supported
* H.264 and protected H.264 (from iTunes Store): Up to 5 Mbps, Progressive Main Profile (CAVLC) with AAC-LC audio up to 160 Kbps (maximum resolution: 1280 by 720 pixels at 24 fps, 960 by 540 pixels at 30 fps) in .m4v, .mp4 and .mov file formats
* iTunes Store purchased video: 320 by 240 pixels or 640 by 480 pixels
* MPEG-4: Up to 3 Mbps, Simple Profile with AAC-LC audio up to 160 Kbps (maximum resolution: 720 by 432 pixels at 30 fps) in .m4v, .mp4 and .mov file formats
Audio formats supported
* AAC (16 to 320 Kbps); protected AAC (from iTunes Store); MP3 (16 to 320 Kbps); MP3 VBR; Apple Lossless; AIFF; WAV
===========================================================
You may be able to right or ctrl click on the problem file in iTunes and choose Convert to AppleTV format - trouble is it will re-encode the 'incompatible file' again and probably further reduce quality.
What are you currently using to convert the AVIs?
AC

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