Audio is enough to study English

When I started to find good screen recording tool for Oracle Linux, I found only black screen recorded. But ffmpeg can record audio from game I can translate then to study.

There are steps to install ffmpeg

sudo dnf -y install https://download.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

sudo dnf localinstall --nogpgcheck https://download1.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm

sudo dnf install --nogpgcheck https://download1.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-8.noarch.rpm

sudo dnf install http://rpmfind.net/linux/epel/7/x86_64/Packages/s/SDL2-2.0.10-1.el7.x86_64.rpm 

sudo dnf install ffmpeg

sudo dnf -y install ffmpeg-devel

Then I have to run x11grab to record audio, command look like

ffmpeg -y \
-video_size 800x600 \
-framerate 30 -f x11grab -i :0.0 \
-f pulse -ac 2 -i default \
/tmp/screen1_recording_`date '+%Y-%m-%d_%H-%M-%S'`.mp4 \
&> /tmp/screen1_recording_`date '+%Y-%m-%d_%H-%M-%S'`.log