On 18-Sep-2000 Frank Klemm wrote:
> Castanets-v15_323Kb.mp2
This is a VBR mp2 file. It plays fine on mpg123 and xmms, but I haven't tested
the VBR output of toolame on anything else. The average bitrate is 323kb, and
the file was created using a VBR "quality" of 15.
> Reading Castanets.wav ...
> Reading Castanets-v15_323Kb.mp2 ...
> 2*16 bit 44100 Hz*6.610 s
> Listening X X is A? 1/1 1.00 0.00 bit
> Listening X X is B? 2/2 2.00 1.00 bit
> Listening X X is B? 3/3 4.00 1.00 bit
I've got absolutely no idea what all this stuff is. A/B listening test?
> Is this a bug in toolame or a bug in the MP2 decoder?
If I could understand the above information, I might be able to understand what
you are referring to as a bug/problem.
> -v15 should be sufficient for MP2.
the VBR level ratings are no "guarantee" of quality. It is simply forcing the
bit_allocation routine to assign more bits until the calculated MNR > VBRLevel.
Of course, the higher the VBR level, the better the comparitive quality will be
- but you may need to go up to '-v 1000' to get good absolute quality.
later
mike
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
