[FFmpeg] Command Line.

Loop video, mp3, mp4, wmv,...

• ffmpeg -stream_loop 4 -i video_name.mkv -c copy video_name.mp4

Convert mkv to mp4:

• ffmpeg -i video_name.mkv -i 001.mp3 -codec copy -shortest video_name.mp4

Merge mkv and mp3 to mp4 with scale video:

• ffmpeg -i COVER_30_MINS.mkv -i 001.mp3 -acodec copy -shortest -vf scale=1280:720 out003.mp4

Create video from image folder:

• ffmpeg -r 25 -i Untitled_%03d.png -s:v 1920x1080 -vf "fps=25,format=yuv420p" out.mp4