#! /bin/env python3
# encoding: utf-8

# ffmpeg -i 2518* -codec:v libtheora -qscale:v 3 -codec:a libvorbis -qscale:a 2 output.ogv
# ffmpeg -i 2518* -c:v libx264 -preset slow -crf 22 -profile:v high -level 4.2 -codec:a libvorbis -qscale:a 2 output.mp4

# ffmpeg -i 2518* -af "volumedetect" -f null /dev/null | parse mean_volume: -22.8 dB
# -filter:a "volume=2.8dB"

import over