[MPlayer-dev-eng] Re: [PATCH] don't skip first mp3 frame
D Richard Felker III
dalias at aerifal.cx
Mon Mar 22 14:44:52 CET 2004
On Mon, Mar 22, 2004 at 10:24:59AM +0100, Alban Bedel wrote:
> Hi D Richard Felker III,
> on Sun, 21 Mar 2004 22:04:49 -0500 you wrote:
> > On Sun, Mar 21, 2004 at 06:07:50PM -0800, Nehal wrote:
> > > for some reason, the current code skips the first frame of
> > > mp3 files (using any decoder), i'm assuming this is a bug
> > > as i can't see any good reason for this.
> > It was added intentionally to avoid hearing pops at the beginning of
> > some files. Of course this is an incorrect, idiotic fix. 100l to
> > someone...
> pops ?? lol it's really not the pb. Way too often the first
> frame is buggy and initialize mp3lib with totaly wrong parameters.
> So you end up playing at 11050Hz some nice 48000Hz, etc And that
> happend with a really significant amount of files :(((
> A better fix is welcome ;) Anyway in betewen someone changed the
> ad_mp3lib to skip the first frame. So with mp3 files the first 2
> valid frames are skipped now.
> > > this probably isn't noticeable with most files, but i have
> > > a couple of test cases that have audible sound data in the
> > > first frame. if someone wants, email me and i'll send you
> > > the starting part of the files for testing purposes.
> > >
> > > please apply the patch that i've attached
> > Please send a patch that fixes whatever bug is causing the first frame
> > to be decoded as a horrible pop in many files, and we'll gladly apply
> > this patch too.
> I'll strongly advice a VERY EXTENSIVE testing (including loads of stuff
> encoded with old encoders) before renableing the decoding of the first
All other apps handle it fine, so it must be a bug in MPlayer, not the
file. Maybe the first frame of the file is broken, but it's easy to
detect that it's broken and MPlayer just fails to detect that...
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