A simple Python 3 script to run ffprobe and print durations and sizes of media files.
Requires (and works on any) Python 3.6 or above, as tested using https://github.com/FRex/anypython, due to usage of f-strings.
If you require support for older Python 3.x or 2.7, or find a mistake - let me know.
$ python3 vidduration.py /e/*.*
File | Duration| Size
-------------|---------|----------
E:/test1.mp3 | 48:53| 89.5 MiB
E:/test2.mp3 | 50:29| 69.3 MiB
E:/test3.mp3 | 01:07:06| 122.9 MiB
E:/test4.mp3 | 46:16| 84.7 MiB
E:/test5.mp4 | 00:29| 11.3 MiB
-------------|---------|----------
TOTAL | 03:33:13| 377.8 MiB