ffmpeg how to cut video without quality loss?

Question

Video

I am using fmpeg.

Team

ffmpeg -i original_video.mp4 -c copy -ss 00:01:43 -to 00:01:47 cut_1_test.mp4

Gives incorrect result - black screen at the beginning, frame failure, etc.

Team

ffmpeg -i original_video.mp4 -vcodec libx264 -ss 00:01:43 -to 00:01:47 cut_1.mp4

Gives the correct result, but the specific libx264 codec is specified here.

How to cut video without quality loss?

Answer 1

move the option -ssbefore specifying the input

ffmpeg -ss 00:01:43 -i original_video.mp4 -c copy -t 00:00:04  cut_1_test.mp4