Many people asked, "Can HandBrake Convert M4V Videos to MP4"?
The answer is: you can convert some M4V videos to MP4 with HandBrake while some cannot be.
HandBrake is one of the most popular free video converts that can convert videos, DVDs and blu-ray movies to the format which is compatible with your device. It can easily convert M4V (DRM-free) files to MP4, MKV, iPhone, Windows Media Player, etc.
Note: As is noted on its page, HandBrake can't remove DRM. So if you want to convert DRM protected M4V to MP4, please get more information in Part 2.
#2. VLC Media Player
Like most of people, I use VLC as a media player. So it is really surprising when I dig out its hidden feature as an M4V to MP4 converter. Just open VLC Media Player, drop down "Media" menu and then select "Convert/Save" from the listing. In the following-in pop-up window, add the M4V files you want to convert and press "Convert/Save" button on the lower right corner. Then, select "Video – H.264 + MP3 (MP4)" from "Profile" pull-down.
All done! You can now use VLC to convert M4V to MP4 successfully.
This is an online M4V to MP4 converter freeware. Supporting 12918 different conversions for video, audio, document, eBook, and image formats, it’s really easy to use and lets you convert M4V videos online without having to download any software.