Comment 1 for bug 1023787

An alternative idea would be to do like Serato Scratch Live or DJ Intro does: the track waveform is generated on-the-fly such that each time you seek, it renders a fresh waveform two pixel columns forward, one behind, two forward, one behind, and so on to the edges of the screen, then to some buffer size limit. As the deck plays (in either direction) it renders to keep up. (I would imagine it stops if the deck is stopped as long as the on-screen section is fully rendered.) The advantages of that approach are 1) no disk space needed, 2) no waiting for analysis since it's going on continuously.