HLS transcoding leaving defunct processes

[m1k1o]

After killing ffmpeg transcoding profile, defuct (zombie) processes can be seen.

This should be fixed by f004def but it does not seem to be working correctly.

[m1k1o]

Could be fixed by waiting for child to finish .Wait(). From: https://stackoverflow.com/a/29552044/1113204

[m1k1o]

That actually didn't fix all cases. It still occurs on one of my servers. Maybe closing stdin could fix it.

[m1k1o]

If using sh -c and it calls multiple processes, they are never killed. Although this is not directly issue of this implementation, it does not allow calling mutliple processes and piping them, only one.