How to convert ts to mp4
There are two FFmpeg frontends that I have used quite a bit for batch video conversion:

WinFF
XMedia Recode

They are both for Windows, but I know there are more free FFmpeg frontends out there for other platforms. QWinFF is for Windows &amp; Linux, but I think development has ceased.

https://alternativeto.net/tag/ffmpeg/
https://alternativeto.net/tag/ffmpeg-gui/