There no compressed and uncompressend format on video data...only converting one format to another format...As your video in divx format (Little bit loss of quality... ignorable) you can convert to avi...but you can't get the quality back...
TMPEGenc converts AVI file to MPEG1, the format which is used in VideoCD and also MPEG2 not for Divx to AVI
May works
*www.riverpast.com/en/prod/videocleaner/index.php