Subject: Re: [linux-audio-dev] cdparanoia fails / audiofile comparer
From: Erik de Castro Lopo (erikd-lad_AT_mega-nerd.com)
Date: Tue Dec 16 2003 - 08:44:40 EET
On Mon, 15 Dec 2003 22:37:20 +0200
Juhana Sadeharju <kouhia_AT_nic.funet.fi> wrote:
> Also an audiofile comparer program would be great to have: a program
> which finds matching regions. Now it was easy to compare the regions
> up to the "!" point with md5sum program, but it was difficult to compare
> the end part due misaligning. I compared them visually at a few random
> points. In such a comparer program each matching sample would match
> bitwise for this application, but they could match with an error tolerance
> if the application is to compare an original audio and an edited audio
> which is affected by dither noise (say). So, such a comparer would
> reveal what edits were done in an audio editor -- I have needed such
> a program a few times earlier.
I started a program like that based on libsndfile. Its definitely not as
easy as you might at first think, especially when dealing with say
45 minutes worth of 96kHz/24bit/Stereo data :-).
Maybe I should clean that code up a bit and post it.
Erik
-- +-----------------------------------------------------------+ Erik de Castro Lopo nospam_AT_mega-nerd.com (Yes it's valid) +-----------------------------------------------------------+ The word "Windows" is a word out of an old dialect of the Apaches. It means: "White man staring through glass-screen onto an hourglass..."
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