It should be possible to convert MP2 sound files as MP4s with programs that support both these formats. The resulting quality will greatly depend on the original.
Convert Sound file (MPEG-1 Layer II Audio Stream) to MPEG-4 video file format.
We have found 8 software records in our database eligible for .mp2 to .mp4 file format conversion.
Microsoft Windows software - convert mp2 to mp4 on Windows
A timeline-based video editing software from Adobe
Convert from mp2 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 mp2 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.
A DVD ripping software package
Universal All Purpose Free Media, Audio & Video Converter Player Recorder
A video converter software
Video converting software
A music library management program - renamed to Helium (version 12) and replaced in 2016
A multimedia converting tool for Windows
Apple macOS / Mac OS X software - convert mp2 to mp4 on OS X
Universal video converting software for Mac