Steps to reproduce:
1. install ffmpeg to a different system binary location (e.g /opt/ffmpeg)
2. set org.opencastproject.composer.ffmpeg.path=/opt/ffmpeg/ffmpeg in configuration.properties
3. run silence-detection
silence-detection fail, because ffmpeg binary istn't found on your system
silence-detection should use ffmpeg binary from config.properties
Workaround (if any):
add ffmpeg-path to $PATH
pull request #737 against r/1.6.x
pull request #738 against r/2.0.x
pull request #739 against r/2.1.x
r/1.6.x: Merged PR 737 () as f2e1fcc.
r/2.0.x: Merged PR 738 () as 11a73f2.
r/2.1.x: Merged PR 739 () as f7b4ef9.