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Subject: Re: recording failures (was A rockbox survey - and recording failures)
From: Linus Nielsen Feltzing (linus_at_haxx.se)
Date: 2003-11-08


John Covici wrote:
> I doubt its the id3 tag, because I just played a file with lots of id
> material -- in fact in the rockbox itself it reads the id tags ok,
> but a file recorded on the archos craps out mpg123.

You seem to think that all ID3V2 tags are the same. They are not. There
are several versions of the ID3V2 standard.

Besides, why should mpg123 understand the ID3V2.4 header just because
Rockbox does it? They are not the same program, they don't even share a
single line of code.

> Also (and I am not sure what to do about this), even if the file
> plays on another program (such as freeamp), it has trouble navigating
> even a short file perhaps due to the vbr I am not sure.

That could be a problem with the Xing header. Try "Update VBR file" in
the ON+Play menu.

Let me analyse the output from mpg123 again, since you must have missed
my first analysis in a previous post:

> Playing MPEG stream from R031031-195407.mp3 ...
> Junk at the beginning 49443304

This "junk in the beginning" is nothing more than the ID3V2.4 header.
494433 in ASCII is "ID3" and the 04 is the version number, thus ID3V2.4.
This means that mpg123 does not understand the ID3V2.4 header. The rest
of the error messages come from other attempts to find an MP3 frame
inside the 4kbyte large header:

> MPEG 1.0 layer III, 112 kbit/s, 44100 Hz mono
> big_values too large!
> mpg123: Can't rewind stream by 1369 bits!
> Illegal Audio-MPEG-Header 0x55cad692 at offset 0x17e6.
> Skipped 3915 bytes in input.
> big_values too large!
> big_values too large!
> mpg123: Can't rewind stream by 1288 bits!
> big_values too large!
> mpg123: Can't rewind stream by 1161 bits!
> big_values too large!
> big_values too large!
> mpg123: Can't rewind stream by 1624 bits!
> big_values too large!
> mpg123: Can't rewind stream by 1288 bits!

Could you please try again without the ID3V2 header?

Linus



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