Okay, I isolated a 3 second clip from that track:
http://home.hiwaay.net/~stephena/near-silence.wav
http://home.hiwaay.net/~stephena/near-silence.mp3
I was wrong, earlier lame's encode the same way as the newer
alphas. I am still surprised however at the bitrate selected for this
piece. VBR 2 chooses 112 for 83% of the frames in this 3 second
clip. With my volume maxed out I can barely hear the "sound". I
guess I'm just a little surprised that lame doesn't choose a more
aggressive bitrate considering the output level is so low.
I haven't started to dig into the source yet, but I wonder if a more
aggresive VBR selection could be used depending on the output level
of a frame depending on the peak output (or average) of the entire
piece. The 3 second track is all quite so maybe 112 could be
justified (in case volume is maxed). But, in terms of the original
track, the three seconds cropped could be considered silence in
comparison to the peak or average output level of the whole track.
Is this a rediculous idea?
Steve
On 22 May 2000, at 19:18, Stephen Anderson wrote:
> The files that I was talking about are located at:
>
> http://home.hiwaay.net/~stephena/test1.wav
> http://home.hiwaay.net/~stephena/test1.mp3
>
> Steve
>
>
> On 22 May 2000, at 18:09, Stephen Anderson wrote:
>
> > I believe I have detected a problem with the silence detection routines
> > after the modification for them to detect > 16 kHz.
> >
> > I have encoded Pink Floyd - A Momentary Lapse of Reason - A New
> > Machine (part 2)
> >
> > Approximately half of the 38 second track is what I would consider
> > (and in a wave analyzer looks like) analog silence. However, using
> > dk's lame384a1_b and the settings: -m j -h -v -V 2 -b 96
> > I get the following statistics from musicutter:
> >
> > Bitrate - Frames - Percentage
> > 0 - 0 - 0.0%
> > 32 - 1 - 0.1%
> > 40 - 0 - 0.0%
> > 48 - 0 - 0.0%
> > 56 - 0 - 0.0%
> > 64 - 1 - 0.1%
> > 80 - 0 - 0.0%
> > | 96 - 26 - 1.7%
> > |||||||||||| 112 - 362 - 24.3%
> > |||||||||||||||||||| 128 - 593 - 39.9%
> > ||||||||||||||| 160 - 457 - 30.7%
> > | 192 - 39 - 2.6%
> > 224 - 5 - 0.3%
> > 256 - 2 - 0.1%
> > 320 - 2 - 0.1%
> > Average bitrate: 135.7
> > Length: 00:38.87
> > Total frames: 1488
> >
> >
> > Previously on tracks with lots of silence I got lots of bitrate 32 frames.
> > In this piece I have 1. I think this is a mistake.
> >
> > I will be making the wav and mp3 accessible on a webserver for
> > those interested to take a look at. With my 56k modem it will take a
> > while though. I will reply to this message once the upload to my
> > webserver is complete with the address that you can get the files
> > from. Thanks.
> >
> > Stephen Anderson
> > [EMAIL PROTECTED]
> > --
> > MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
> >
>
>
> --
> MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
>
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
