Permanent .avi file fix?

[Smack2k]

I have several .avi files that when I open them say "The avi file is broken. Seeking will not work correctly. Do you want to try and fix it?"

I choose repair and after the avi index rebuild screen runs through the file plays fine.

However if I close and re-open the file, I have to do the same thing again.

Is there a way to permanently fix these files?

[AlanHK]

Try Avidemux.
Do File/save as with the container AVI and video and audio both set to the default "copy".
That usually works.

And/or Virtualdub: Set video and audio to "Direct stream copy"; then File/Save as AVI.

Sometimes I run them both. Each seems to fix different problems.

This is very fast, as the video is not reencoded.

Play it later to check sync. You can use Avidemux to adjust delay if necessary (use the "shift" box below audio).

[Baldrick]

Or use divfixpp.