使用 ffmpeg 将 mp3 转换为 mp3 卡拉 OK

Question

I need you to help me. I have tried several ways but does not work. I try to convert an mp3 file to karaoke with ffmpeg .

I tried this but does not work:

$cmd = 'ffmpeg -i file.mp3 -af "highpass=f=120, lowpass=f=120, \
channelsplit=channel_layout=stereo[L][R]; \
[R] biquad=-1:0:0:1:0:0[Rinv];[L][Rinv]amerge"  karaoke.mp3'

Answer 1

To use phase cancellation on a stereo track with centered vocals you can simply do:

ffmpeg -i file.mp3 -af pan="stereo|c0=c0|c1=-1*c1" -ac 1 karaoke.mp3

As you can see pan also accepts a negative value.

Answer 2

thanks this was useful, but could you please guide me how do i obtain\/extract only vocals from a song, I use the above ffmpeg command but it feels like it sends singer vocals to background.