RAW sizes differ between the original and the encoded-decoded files, headers
appear to be same (44 bytes) size.
- original wav - raw = header
t4 14,276,684 14,276,640 44
- encoded then decoded back (cbr and vbr)
t4_b256_ms_h 14,275,816 14,275,772 44
t4_V1_b128_mj_q1_t 14,275,816 14,275,772 44
The original .wav is reported to be 0:00.005 longer (1:20.933 vs. 1:20.928).
The 1/200s difference might well account for the 868 extra bytes.
Whether this is normal or accidental from the lame standpoint, I don't know.
Liviu
----- Original Message -----
From: "Mark Taylor" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, October 02, 2000 10:15 PM
Subject: Re: [MP3 ENCODER] lame 3.87 encode-decode roundtrip
>
> >
> > True, it was the -t encode switch.
> > By the way, isn't "lame -?" << -t disable writing wav header when
> > using --decode >> a bit misleading about this?
> >
> Yes, that is a little misleading: "-t" option is listed twice,
> since it disables wav headers when decoding, and disables
> Xing headers when encoding.
>
>
>
> > Thank you,
> > Liviu
> >
> > P.S. The resulting .wav's are slightly _smaller_ than the original, see
file
> > listing below - t4.wav is the original wav, t4*.mp3 the encoded mp3's
and
> > t4*.wav the decoded wav's.
> >
>
> Could easily be a bug in LAME. But before I look into this, can
> you do one more thing: compare the .wav headers? LAME writes
> a very spartin .wav header. t4.wav may include some extra "chunks"
> not in the LAME produced wav headers.
>
>
> > 14,276,684 t4.wav
> >
> > 2,590,511 t4_b256_ms_h.mp3
> > 1,862,685 t4_V1_b128_mj_q1.mp3
> > 1,862,268 t4_V1_b128_mj_q1_t.mp3
> >
> > 14,275,816 t4_b256_ms_h.wav
> > 14,280,424 t4_V1_b128_mj_q1.wav
> > 14,275,816 t4_V1_b128_mj_q1_t.wav
> >
> >
>
> There does seem to be a bug in lame 3.87 - the decoder no longer
> recognizes the VBR header, and instead encodes it as silence.
> This is why t4_V1_b128_mj_q1.wav is larger.
>
> Mark
> --
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>
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