Downloading multi-part rtmpe into singe file

[_Nazar_]

Hello! Some video streaming services often streams their long videos (e.g. full episodes) as multi-part rtmpe streams.

For example:

Serial_ep1_s1
rtmpe://server.net/ondemand/path/serial_ep1_s1_act1.mp4
rtmpe://server.net/ondemand/path/serial_ep1_s1_act2.mp4
rtmpe://server.net/ondemand/path/serial_ep1_s1_act3.mp4
rtmpe://server.net/ondemand/path/serial_ep1_s1_act4.mp4
rtmpe://server.net/ondemand/path/serial_ep1_s1_act5.mp4

Is it possible to download these streams into single mp4 file?
If not could it be realized?