Video to Video Converter (Windows)
If you are using a Windows PC, the first software I recommend you try to convert your MP4 files to AVI is Video to Video Converter which is completely free and does not require installation to work.
To download it to your computer, connect to its website and click on the button first Download and then on the voice Click here to download ZIP archive. When the download is complete, then open the archive VTV.zip, extract its contents to any folder and start the program vv.exe.
Then select thecittàn from the menu to choose the language and presses on OK to access the Video to Video Converter main screen. At this point, drag the MP4 files you want to convert to AVI in the program window and click on the icon REVIEWS present nella schermata che si apre.
Next, make sure that in the right sidebar the fields Quality e Video size are set to respectively Same as sourcee Original (in order to keep the same quality and the same resolution of the source video) and presses on OK.
Finally, click on the icon of folder which is located at the bottom right to select the folder in which to save the converted videos and presses the button Converted which is located at the top left to start processing.
Mobile Media Converter (Windows / Mac / Linux)
Another great software that allows you to convert MP4 files to AVI it is called Mobile Media Converter, it is free as Video to Video Converter, it can also be used without facing installations and it is also compatible with Linux and Mac OS X (even if the version for Apple systems has not been updated for some time and therefore may have some malfunction).
To download Mobile Media Converter on your PC (Windows PC), connect to the official website of the program and click on the item portable found under the heading Download for Windows. Then start the executable Mobile Media Converter xx Portable.exe just downloaded and drag the MP4 files you want to turn into AVI into the application window.
Then select the item AVI video give menu to tendin Conversion to, click on arrow located at the bottom right to display the settings panel and set the qualitative level of the output video on High (high) or Medium (medium). Once this step has also been completed, press the button Convert and wait for the conversion to come to an end.
If you want, you can also fine-tune the output video parameters (e.g. bitrate or framerate) by clicking on the button Advanced but, please, try these settings only if you know where to put your hands!
Adapter (Windows / Mac)
If you are using a Mac, since Mobile Media Converter has not been updated for some time, I recommend that you try Adapter (which is also available for Windows anyway). It is an excellent free converter that can process all major audio video file formats with great ease.
To download it to your computer, connect to its official website and click on the button Download. Then open the package dmg that contains the program and drag its icon into the folder Applications in OS X.
At this point, start Adapter, click on the button Continue to accept the download and installation of FFMPEG (a free software necessary for the program to work) and drag the MP4 files you want to transform into AVI in the window that opens.
Successively select the voice Video> General> Custom AVI from the drop-down menu at the bottom, click on thegear to access the Adapter settings panel and set the item Resolution su Same as source and the voice Quality su High o Very high (in order to obtain high quality output videos with the same resolution as the input ones). Finally, press the button Convert and wait for the video processing to be completed.
How to convert MP4 files to AVI