Re: [Toolame-devel] Mp2 in a .wav file format and parallel encoding

[Jesse S. <sc...@gm...>]

Update, turns out after much banging of my head into a brick wall, I
finaly figured out that even though the test.aiff file sounded like it
was ok, other encoders produced the same noise after converting.  Now
my question is simply what is the best way to convert *input*  to PCM,
I may have Prophet Systems formated .wav files, .mp3, or .wav in pcm
format.

On Fri, 30 Jul 2004 12:14:41 -0400, Jesse Schoch <sc...@gm...> wrote:
> I've been having lots of problems with noise in my output. see below.
> 
> Snip, snip
> 
> 
> >
> > Batch converting is trivially simple on Linux -- it just takes a little shell
> > scripting.  Something like:
> >
> > #!/bin/bash
> > for i in /some_dir/*.wav;
> >   do toolame -m s -b 256 "$i";
> > done
> 
> I did quite a bit of expirimentation last night (I actualy got past
> research and started building ) but I could not output an acceptable
> quality file.
> 
> I grabbed libmad (a high quality decoder ???) and libmad-dev with my
> friendly apt-get, I also grabbed madllb  which should output pcm from
> a .wav file.  The problem was that though I could create an acceptable
> sounding .aiff file with madlld and sox, I could not do the same with
> toolame and your patch (didnt' try without your patch).
> 
> Generating the .aiff file with madlld
> ./madlld < This_land_is_your_land.mp2 |sox -r 44100 -t cdr - test.aiff
> madlld: 256000 kb/s audio MPEG layer II stream without CRC, normal LR
> stereo with no emphasis at 44100 Hz sample rate
> madlld: end of input stream
> madlld: 7299 frames decoded (3:10.667).
> 
> Various toolame attempts
> 
> ./madlld <This_land_is_your_land.mp2| toolame -t 2 -p 2 -v 10 -s 44.1
> -e -b 256 -W  - out.mp2
> --------------------------------------------
> Input File : 'stdin'   44.1 kHz
> Output File: 'out.mp2'
> 256 kbps MPEG-1 Layer II stereo Psycho model=2  (Mode_Extension=0)
> [De-emph:Off    Copyright:No    Original:No     CRC:On]
> [Padding:Off    Byte-swap:Off   Chanswap:Off    DAB:Off]
> VBR Enabled. Using MNR boost of 10.000000
> ATH adjustment 0.000000
> --------------------------------------------
> encode_init: using tablenum 1 with sblimit 30
> madlld: 256000 kb/s audio MPEG layer II stream without CRC, normal LR
> stereo with no emphasis at 44100 Hz sample rate
> absthr[][] sampling frequency index: 1
> madlld: end of input stream
> madlld: 7299 frames decoded (3:10.667).
> Hit end of audio data
> VBR stats:
>   32   48   56   64   80   96  112  128  160  192  224  256  320  384
>    0    0    0    0    0    0    0    0    0   52  116   67 7064    0
> Avg slots/frame = 1034.129; b/smp = 7.18; bitrate = 316.702 kbps
> 
> Done
> 
> toolame -b 256  test.aiff outMP2.mp2
> >>> Using Audio IFF sound file headers
> Parsing AIFF audio file
> >>> 44100.000000 Hz sampling frequency selected
> --------------------------------------------
> Input File : 'test.aiff'   44.1 kHz
> Output File: 'outMP2.mp2'
> 256 kbps MPEG-1 Layer II j-stereo Psy model 1
> [De-emph:Off    Copyright:No    Original:No     CRC:Off]
> [Padding:Normal Byte-swap:Off   Chanswap:Off    DAB:Off]
> ATH adjustment 0.000000
> --------------------------------------------
> encode_init: using tablenum 1 with sblimit 30
> [2200]]
> Hit end of audio data
> Avg slots/frame = 835.918; b/smp = 5.80; bitrate = 256.000 kbps
> 
> Done
>