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breakfastquay / rubberband

Official mirror of Rubber Band Library, an audio time-stretching and pitch-shifting library.
http://breakfastquay.com/rubberband/
GNU General Public License v2.0
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Map isn't working as expected #5

Closed maciejorlos closed 1 year ago

maciejorlos commented 7 years ago

Hi, I am trying to use rubberband with Map parameter using external file that looks like: 100 200 201 300 301 350 After applying it to rubberband -t 1 -M ramki ruhana.wav ruhana3.wav I get warning as follows: ignoring mapping from chunk 0 to sample 0 ignoring mapping from chunk 0 to sample 200 WARNING: calculated output duration 0 != expected 350 ERROR: distributeRegion returned wrong duration 0, expected 350

I don't know how should I correctly create map file that will work with my wave file. I would appreciate any help.

cannam commented 1 year ago

I fear this was opened at a time when I didn't have much opportunity to look at these issues, and I overlooked it. Pointless as it probably is to apologise five years later: sorry!

For posterity I think the problem is that the values in the file, which the utility reads as audio sample frame numbers (i.e. 44100 per second in typical audio), are very small and look as if they are probably intended to represent times in seconds. The stretcher is trying to figure out how to adjust stretches within regions of 50-100 samples and failing.

I just tried this file with the current version of the utility and it didn't fail, so I suppose this logic has been made more robust at some point in the intervening time.