Re: [Audacity-devel] Audible glitch importing an AC3
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From: Richard A. <ri...@au...> - 2009-01-06 21:09:12
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On Sun, 2009-01-04 at 23:41 -0600, Leland wrote: > It's closer to 6:33...I've attached a picture. On the Mac, it does not > show the same problem and it plays just fine, both in Audacity and iTunes. Hmm, similar test results here: * a52dec on the command line produced a file without the dropout, no errors. * ffmpeg import in audacity produces a drop-out rather like the screenshot, but without the DC offset in the right channel (and error messages on the command line). * ffmpeg (the same ffmpeg) on the command line produces no drop-out but a tone burst superimposed on the audio at the same place (and errors in the Audacity error log). My ffmpeg snapshot is from 14th November 2008. Leyland's old ffmpeg is using liba52 (mine, and I suspect most modern ffmpegs) doesn't use liba52. Presumably my ffmpeg doesn't have whatever fix makes it work with more recent builds of ffmpeg. Updating to 19/12/2008 ffmpeg snapshot gives me an import that works fine within ffmpeg, so I'm happy that using a recent ffmpeg fixes the problem, and we don't have an issue to report upstream. Richard |