I have a collection of videos, in the
.mp4 (AAC+H.264) formats. The
.mkv files are ok, but all the
.mp4 files have such a low volume that I can hardly hear it on my phone, even when volume is maxed.
I convert them using
avconv so they're smaller for my phone. It works fine, but I have not yet found out how I can normalize the volume on all the
.mp4 files so they match the
Just raising the volume alone would be a great achievement.