> I notice that mplayer2 can handle your ACELP example, but mplayer and
Winamp
cannot.
> Is there a list somewhere of codecs supported by
WMP? Is it possible to
create
> user-defined plug-ins and additional codec
identifier definitions for WMP so
they can
> handle other codec types? My company does work on
mil/gov codecs like MELPe;
making
> it possible for people to click on a MELPe
compressed file using WMP would be
very
> convenient.
Yes, to write your own Winamp decoder plug-in, read this:
http://www.winamp.com/nsdn/winamp2x/dev/plugins/in.jhtml
-Mark
> -Jeff
> > --- Jeff Brower <> wrote:
> > > Shaofeng-
> > >
> > > > The 'fact' chunk is required for all compressed
> > > audio
> > > > formats, and for the case where the data is
> > > included
> > > > in 'wavl' list chunk.
> > >
> > > What kind of .wav files typically contain non-PCM
> > > data? Can you give some
> > > typical examples? Do they still have .wav
> > > extensions, or some other
> > > extensions?
> > >
> > > Thanks.
> > >
> > > -Jeff
> > >
> > > > --- Jeff Brower <> wrote:
> > > >> Shaofeng-
> > > >>
> > > >> FWIW, most .wav files are 44 byte header (e.g.
> > > >> Microsoft examples included with
> > > >> WinXX) and don't have the 'fact' tag.
> > > >>
> > > >> Jeff Brower
> > > >> system engineer
> > > >> Signalogic
> > > >>
> > > >> Shaofeng Li wrote:
> > > >> >
> > > >> > Padmalatha,
> > > >> >
> > > >> > You can refer to this link for wave format:
> > > >> >
> > > >> >
> > > >>
> > > >
> > >
> >
http://ccrma-www.stanford.edu/CCRMA/Courses/422/projects/WaveFormat/
> > > >> >
> > > >> > Your wave file is formatted as follows:
> > > >> >
> > > >> > Chunk Id = 'RIFF'
> > > >> > Chunk Size = 5996
> > > >> > Format = 'WAVE'
> > > >> >
> > > >> > Subchunk Id = 'fmt '
> > > >> > Subchunk Size = 18
> > > >> > AudioFormat = 0x0007 (WAVE_FORMAT_MULAW)
> > > >> > NumChannels = 1
> > > >> > SampleRate = 8000
> > > >> > ByteRate = 8000
> > > >> > BlockAlign = 1
> > > >> > BitsPerSample = 8
> > > >> > ExtraParamLen = 2
> > > >> > ExtraParamVal = 0x0000
> > > >> >
> > > >> > Subchunk Id = 'fact'
> > > >> > Subchunk Size = 4
> > > >> > Subchunk Val = 0xe8160000
> > > >> >
> > > >> > Subchunk Id = 'data'
> > > >> > Subchunk Size = 5864
> > > >> >
> > > >> > Regards,
> > > >> > /Shaofeng
> > > >> >
> > > >> > --- Padmalatha Y <>
> > > wrote:
> > > >> > > Hi All,
> > > >> > >
> > > >> > > Can any one tell me the wave header
> > > for
> > > >> > > mu-law and A-law. I have a wave file which
is
> > > >> mu-law
> > > >> > > 8-bit mono which has 56 bytes as header. I
> > > want
> > > >> to
> > > >> > > know in what format are these bytes
arranged.
> > > >> The
> > > >> > > following 56 byte header is provided for
> > > >> reference.
> > > >> > >
> > > >> > > 52 49 46 46 6C 17 00 00 57 41 56 45 66 6D
74
> > > 20
> > > >> > > 12 00 00 00 07 00 01 00 40 1F 00 00 40 1F
00
> > > 00
> > > >> > > 01 00 08 00 00 00 66 61 63 74 04 00 00 00
E8
> > > 16
> > > >> > > 00 00 64 61 74 61 E8 16 00 00
> > > >> > >
> > > >> > >
> > > >> > > Thanks in advance,
> > > >> > > Padmalatha
>
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