ffmpeg how to normalize / increase the volume of your audio
It's very convenient that ffmpeg can also handle audio manipulation too.
Just modify the command below, We set the volume to 18.64db, so you can adjust to whatever you need.
ffmpeg -i input.mp4 -filter:a "loudnorm=I=-18.64:TP=-1.5:LRA=11" -c:v copy output.mp4
output.mp4 will now be normalized to whatever do you specified above.........
ffmpeg Linux Mint download, compile and install howto
#if you have nvidia make sure you install the nvidia-cuda-toolkit so hardware acceleration can be used
wget http://ffmpeg.org/releases/ffmpeg-3.3.2.tar.bz2
tar -jxvf ffmpeg-3.3.2.tar.bz2
cd ffmpeg-3.3.2/
./configure --disable-yasm
install prefix /usr/local
source path ........