Re: [Kaldi-developers] Problems writing HTK files

[Arnab G. <ar...@gm...>]

That happens because you are using TableWriter to write the HTK
features. This is to be used for writing Kaldi-style objects that are
always stored as key-value pairs: in your case key my be the utterance
ID and value being the actual features. You can find more information
at: http://kaldi.sourceforge.net/io.html

If you really need to write something that will be processed by a
non-Kaldi tool that expects HTK-style feature files, you should
directly open the file and write to it (you may want to use
kaldi::Output). But note that the filenames cannot have "ark:" or
"scp:" like qualifiers; the name will be treated as a literal.

-Arnab

On Sun, Aug 19, 2012 at 12:16 AM, Xavier Anguera <xan...@gm...> wrote:
> Hi,
> I have extracted the code below from some example file and I am trying
> to make it write an HTK-compliant features file.
> I almost make it, except that the file I get contains the HTK file
> (readable by HList, all correst) with the preceding key I pass to
> htk_writer (in my case the string "key", I tried passing it "" but it
> complains).
> Is there a way not to have the annoying key always written into the HTK file?
>
> Thanks!
>
> Xavier Anguera
>
>
>
>         std::pair<Matrix<BaseFloat>, HtkHeader> p;
>         p.first.Resize(m_feats.NumRows(), m_feats.NumCols());
>         p.first.CopyFromMat(m_feats);
>         HtkHeader header = {
>         m_feats.NumRows(),
>         (int)(m_mfcc_opts.frame_opts.frame_shift_ms * 10000), //shift
>         sizeof(float)*m_feats.NumCols(),
>         011
>         };
>
>         p.second = header;
>
>         string outputFile = "ark:";
>         outputFile += fileName;
>         TableWriter<HtkMatrixHolder> htk_writer(outputFile);
>         htk_writer.Write("key", p);
>
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