AM Software | Freeware AVI Frame rate changer

AVIFrate is an utility that allows you to change many important fields in an avi file header. Most often you need to adjust the frame rate of the avi video stream. The frame rate is determined when you play a file by simple formula:

fps=dwRate/dwScale

where fps is "frames per second" playback speed, dwRate and dwScale are fields of the video stream header

After you change these values, AVIFrate will re-calculate frame rate and will allow you to write it directly into the file header. You can undo changes made until you exit AviFrate. This allows you to try out some values before you decide to keep them.

Next important thing to change is so-called fourcc field. It is used by Windows to determine which codec should be used to decompress video during playback. There are few codecs that have different fourcc field but, in fact, they use the same compression scheme. If you have some other codec that differs from mentioned in an avi header, you may try to change these four characters to meet the expected codec.

What makes the AVIFrate from AM Software unique ?

it allows you to undo changes made until you exit. So, there are less chances to damage your avi files by wrong settings
it does a few checks before it starts file change. This will prevent you from editing of winword.exe, for example :)
it has the smallest seen executable size for now. Just think about greatly decreased download time and enjoy!

Now here is a command-line version of AVIFrate for batch processing of avi files.
It is a Win32 console application intended to run from a bat file or maybe in FAR file manager (probably it is the best one, and the only one working in a text mode console window).

AVIFrate is freeware. You can freely use and distribute it provided that application files are not changed.

5 kb screenshot

download avifrate.zip 12.4 kb

download avifrate2009.zip 12.4 kb (see readme.txt for changes)

batch processor to change many avi files fps at once
download avifratecmd.zip 21 kb (see readme.txt for changes)

Just unzip and run. No install required, no specific runtime DLL's need.

If you like this software, you may donate us via PayPal :)