音视频剪切命令
ffmpeg -i input.mp3 -ss 00:00:00 -to 00:00:30 -c copy output.mp3
This will take an input audio file called input.mp3, trim it to only 30 seconds long, starting from the beginning, and save it to output.mp3.
The key options are:
-ss 00:00:00- Seek to the start time, in this case the beginning-to 00:00:30- Set the duration or end time to 30 seconds-c copy- Stream copy without re-encoding, for faster processing You can adjust the start and duration times as needed. Some other useful variations:
Trim from 30 seconds to 1 minute:
-ss 00:00:30 -to 00:01:00
Trim the last 30 seconds:
-ss -00:00:30
The command -c copy, which tells FFmpeg to copy the audio and video streams without re-encoding them. Since the -ss option (start time) is applied before decoding, it may cause a mismatch between the keyframes, leading to the video being absent in the output. So you can re-encoding this trim output video if you meet this problem.
ffmpeg -i input.mp3 -ss 00:00:00 -to 00:00:30 -c:v libx264 -c:a aac output.mp3