I know there is a project to avoid pauses between tracks by extending the
MP3 format with additional tags. But I don't understand why this is necessary and
AFAIS the handling is a little bit difficult.
Proposal:
Input/Output file name pairs. A missing output file name is substituted by
the input name with a new suffix.
lame [options] [input]
lame [options] [input] [output]
lame [options] [input1] [output1] [input2]
lame [options] [input1] [output1] [input2] [output2]
...
Input file names. Output file name are the input name with a new suffix.
lame [options] --input [input]
lame [options] --input [input1] [input2]
lame [options] --input [input1] [input2] [input3]
...
What happens when lame is called with a collection of files?
CODING:
_________________________________________________________________
|
PCM File 1 | PCM File 2
_________________________________|_______________________________
| 1 | 3 | 5 | 7 | 9 MP3 frames
| 2 | 4 | 6 | 8 |
1-2 coded normally and written to the MP3 File 1.
3 coded to MP3 File 1 and clears the bit reservoir
CBR: Use all bits of the bit reservoir and the current frame
VBR: Code normally, determine frame size, round up frame size, code again
for this frame size
4 overlaps with PCM File 2. So the PCM data is taken from PCM File 1 and 2,
coded and written to MP3 file 2. The only handicap for CBR is the cleared bit
reservoir.
5 ist also taken from PCM File 1 and 2.
6+ ist coded in the normal manner and written to MP3 File 2.
Coding can also be done from one big PCM File with Cue sheet or from a
pipe/socket.
DECODING:
Two successive MP3 files with the same sample frequency will be decoded in
the normal way and overlapped by a half MP3 frame without additional
weights.
short file1 [...];
short file2 [...];
...
for ( i = 0; i < sizeofA (file1) - overlap; i++ )
send ( file1 [i] );
for ( i = 0; i < overlap; i++ )
send ( file1 [sizeofA (file1) - overlap + i] + file2 [i] );
for ( i = overlap; i < sizeofA (file2) - overlap; i++ )
send ( file2 [i] );
...
CODING USAGE:
cdparanoia -B /dev/hdd
lame -b 192 --input *.cdda.wav
No big changes so the chance is >1% that normal people will use it.
If you need a FAQ then >90% of the album MP3 files out there are gappy.
DECODING:
A small change in every decoder and the user have nothing to do at all.
--
Mit freundlichen Grüßen
Frank Klemm
eMail | [EMAIL PROTECTED] home: [EMAIL PROTECTED]
phone | +49 (3641) 64-2721 home: +49 (3641) 390545
sMail | R.-Breitscheid-Str. 43, 07747 Jena, Germany
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