MPEG-1 based videos might be easily converted to MPEG-4 format with many video conversion software. Might also want to check MPG to MP4 converters for more options.
Convert Moving Pictures Experts Group video (MPEG-1 IPB) to MPEG-4 video file format.
We found 5 software records in the database related to .m1v to .m4v file format conversion.
Microsoft Windows software - convert m1v to m4v on Windows
Multimedia encoding application from Adobe
Convert from m1v 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 m1v to m4v. 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.
A timeline-based video editing software from Adobe
One of the most popular and succesfful free video conversion sofrware
A multimedia converting tool for Windows
Apple macOS / Mac OS X software - convert m1v to m4v on OS X
Mac version of Adobe's prime video editing software