Question

I have spent some time experimenting with MPlayer slave mode protocol: in a custom application I have two controls: one for changing pitch and one for changing speed.

This is easy to implement using the scaletempo filter and *speed_set* / *speed_mult* commands from the MPlayer API.

There’s a problem however if I try to modify pitch and speed independently. To give an example: I would like to be able to slow down the speed by e. g. 20%, while transposing the pitch up two or three semitones.

I’ve tried to do this with adding two scaletempo filters, but without success:

af_add scaletempo=scale=1.0:speed=pitch
speed_mult 1.1224620482959342
af_add scaletempo=scale=0.8:speed=tempo

This method changes speed, preserving the original pitch.

Is there any other solution to do this with MPlayer or any other media player?

Thanks in advance!

Answer 1

interesting question. As far as mplayer goes, here is one idea, it looks to be free. this may be more what you are after. Of course you could go in a different direction with this. There’s quite a bit of stuff on the net. I hope this helps you get started! CHEERS!