2010/7/19 Dan Dennedy <d...@dennedy.org>: > On Sun, Jul 18, 2010 at 11:57 AM, Simon Eugster <simon...@gmail.com> wrote: >> I just wonder whether there is an easy way to access audio raw data. >> http://kdenlive.org/forum/where-vu-meter >> >> Any hint/idea? > > Anywhere you have a mlt_frame you can get the uncompressed audio for > the duration of that frame by calling mlt_frame_get_audio(). > http://www.mltframework.org/doxygen/structmlt__frame__s.html#a7c9154d09b0f61407e6c40f836947c26 > > One place that may apply for VU meters is in that frame show callback.
So this is finally working (although not because of mine) :) Still, one question. If I want to show dB values, how do I calculate them? Can I assume 0 dB to be at the highest possible number of int16_t (S0), and then calculate the dB of a signal S1 with 10*log(S1/S0)? Simon ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ Kdenlive-devel mailing list Kdenlive-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
