It should be enough to simply rename M4V videos to MP4, because both are same formats.
Convert MPEG-4 video file format to MPEG-4 video file format.
We have found 16 software records in our database eligible for .m4v to .mp4 file format conversion.
Microsoft Windows software - convert m4v to mp4 on Windows
A timeline-based video editing software from Adobe
Convert from m4v file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned m4v to mp4. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
One of the most popular and succesfful free video conversion sofrware
A DRM remover and media converter
A Software for MP4/3GP file conversions
A fully-featured video conversion program
Universal All Purpose Free Media, Audio & Video Converter Player Recorder
A software video converter for Apple TV
A multimedia converting tool for Windows
Apple macOS / Mac OS X software - convert m4v to mp4 on OS X
Mac version of Adobe's prime video editing software
A video converting tool for OS X
A multimedia converter software
A fully-featured video converter for Mac
Universal video converting software for Mac
A video & picture collage maker
A multimedia importer for iTunes
Multiplatform software - convert m4v to mp4 on any platform
Program for multimedia streaming and conversion