FFmpeg is a multimedia framework, which comes with a very powerful command line tool to process multimedia files. It is available for all major platforms. FFmpeg can be used to manually and automatically remux recordings.
Open a terminal (command prompt) and cd into the directory of the recording
Run FFmpeg:
ffmpeg -i AwesomeGirl_-2019-04-04_15-46-19_195.ts -c:v copy -c:a copy AwesomeGirl_-2019-04-04_15-46-19_195.mp4
As you can see, the codecs for video and audio are set to copy, which means, that the recording is not reencoded, but just "copied" to another container format. You could also use mkv or avi for the output file suffix and FFmpeg would create that respective file. Depending on your hardware specs and the length of the recording, this process probably takes a few seconds up to a couple of minutes.
FFmpeg can also be used to automatically remux recordings. ctbrec provides a post-processing mechanism for this purpose.