Old segment files are not removed when service is stopped and started again

[johnwcassidy]

Steps to reproduce:

1. Start service
2. Stream for a few moments so some file segments are added to wherever they are configured to go
3. stop service
4. start service
5. stream for a few moments again

Expected result:
orphaned segments are cleaned up

Actual result:
orphaned segments remain

This is a concern for the configuration I currently have, where i setup a system service to execute raspi-live, and control when it starts and stops with cron. With each stop and start, I'm accumulating orphaned segment files that I will need to clean up manually.

[jaredpetersen]

Yeah, we'd have to look at refactoring how these get cleaned up. Right now, FFMpeg handles that completely.

An easy fix would just be that raspi-live removes everything in the directory on startup so that it starts with a clean slate.