AVIFixed

AVIFixed is a lightweight and portable application whose purpose is to rebuild the index of a movie file. It comes in handy when you have downloaded an incomplete clip, for instance, if you want to get a glimpse of existing content.
The application is also capable of fixing movie problems when it comes to audio and video synchronization. As the name says, it works only with Audio Video Interleave files (AVI format).
As installation is not a prerequisite, you can drop the executable file anywhere on the hard disk and click it to run. Alternatively, you can move AVIFixed to a USB flash disk to run it on any computer without prior installers.
What's more, the Windows Registry does not get new entries, and leftovers are not kept on the HDD after removing the utility.
The interface of the program is based on a single window with a plain layout, where you can load a video into the workspace using only the file browser, since drag-and-drop is not featured.
Rebuilding the video index is done with the simple click of a button, as long as the file is not write-protected. When it comes to fixing the audio and video synchronization, all you have to do is specify a new name and directory for recreating the file in question.
The software utility has a good response time and carries out a task quickly, while using a low amount of CPU and RAM, so it doesn't burden system performance. Unfortunately, AVIFixed has not been updated for a very long time.