: Balance between quality and size (lower is better quality).
Example Command: ffmpeg -ss [start_time] -to [end_time] -i input_file.mkv -c copy output_clip.mp4 young sheldon s06e15 ffmpeg
If your file is in a heavy format like MKV and you need it in MP4 for social media or mobile devices: ffmpeg -i input_file.mkv -c:v libx264 -crf 23 -c:a aac -movflags +faststart S06E15_Mobile.mp4 The faststart flag allows the video to begin playing before it is fully downloaded. : Balance between quality and size (lower is better quality)