useful commands

for file in *.html; do mv "$file" "${file%.html}.txt"; done;

docker exec wireguard cat config/peer1/peer1.conf

ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a aac output.mp4

ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4

ffmpeg -i "http://example.com/video_url.m3u8" -c copy -bsf:a aac_adtstoasc "output.mp4"