Скачать или смотреть FFMPEG | How to Merge, Trim video, compress video | Convert Audio to MP3 | Convert Video to Audio

Download FFMPEG setup from :
https://ffmpeg.org/
Use below mentioned Commands for video Operations :

For video compression
ffmpeg -i video.mp4" -vcodec libx264 -crf 60 outputVideo.mp4

Extract Audio:
ffmpeg -i input.mkv -vn output.mp3

Add Audio:
ffmpeg -i input.mkv -i audio.m4a -map 0:v:0 -map 1:a:0 -c:v copy output.mp4

Adding multiple mp3 files
ffmpeg -i input1.mp3 -i input2.mp3 -i input3.mp3 -filter_complex "concat=n=3:v=0:a=1" -vn -y input.mp3

merging image and audio
ffmpeg -loop 1 -i img.jpg -i music.mp3 -shortest -acodec copy -vcodec mjpeg result.mkv

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

trimming video from start/end
from start
ffmpeg -ss 00:01:00 -i "d:/input/video.mp4" -c copy "d:/output.mp4"

crop video portion
ffmpeg -ss 00:00:10 -i video.mp4 -to 00:18:29 -y -s 640*360 -c copy output.mp4