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Re: [SoX-users] Unknown chunk marker in WAV
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From: TJF <tjf...@we...> - 2010-06-01 13:50:10
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Processing these things in memory (on the fly - resampling): Is there
any advantage to do that in an other lossless format ("sox" i.e.)? Input
"wav" could be handled in another lossless format, because there is no
output-file!
Any advice?
Regards
Thomas
Chris Bagwell schrieb:
> Did you close the file? Its very important to properly close WAV
> files because it updates the header with important information only
> known at end-of-file.
>
> Chris
>
>
> On Fri, May 28, 2010 at 1:44 AM, TJF <tjf...@we...
> <mailto:tjf...@we...>> wrote:
>
> Hi,
>
> has no one an idea how to generate a correct 88200/32 wav file
> with libsox?
>
> The batch command generates a correct file (s.b.):
> sox input.wav -b 32 output.wav rate -v 88200
>
> Regards
> Thomas
>
> ----------------------------
> batch command file:
> ----------------------------
> Length : 110318288
> RIFF : 110318268
> WAVE
> fmt : 40
> Format : 0xFFFE => WAVE_FORMAT_EXTENSIBLE
> Channels : 2
> Sample Rate : 88200
> Block Align : 8
> Bit Width : 32
> Bytes/sec : 705600
> Valid Bits : 32
> Channel Mask : 0x0 (should not be zero)
> Subformat
> esf_field1 : 0x1
> esf_field2 : 0x0
> esf_field3 : 0x10
> esf_field4 : 0x80 0x0 0x0 0xAA 0x0 0x38 0x9B 0x71
> format : pcm
> fact : 4
> frames : 13789776
> data : 110318208
> End
>
> ----------------------------------------
> Sample Rate : 88200
> Frames : 13789776
> Channels : 2
> Format : 0x00130004
> Sections : 1
> Seekable : TRUE
> Duration : 00:02:36.347
> Signal Max : 2.0575e+009 (-0.37 dB)
>
>
>
>
>
>
>
> TJF schrieb:
> > Hi,
> >
> > on my libsox way I found a mistake. The generated wav-file (with
> > effects) shows always this mistakes (see also below). A 44100/16
> wav is
> > upsampled to 88200/32:
> >
> > frames : 0
> > data : 0
> > *** Unknown chunk marker (0) at position 80. Exiting parser.
> > Duration : 00:00:00.000
> > Signal Max : 0 (-1.#J dB)
> >
> > The file has the right size (bytes) and plays fine. But the
> player-API
> > could not find the end.
> >
> > Here is the code (beneath the file-analysis).
> >
> > Regards
> > Thomas
> >
> > ------------------------------------------------------
> >
> > sox_init();
> > data.fd_in = sox_open_read(file, NULL, NULL, NULL);
> > data.fd_out = sox_open_write("temp.wav", &data.fd_in->signal, NULL,
> > NULL, NULL, NULL);
> > data.fd_out->encoding.bits_per_sample = 32;
> > data.fd_out->signal.rate = 88200;
> > data.fd_out->signal.length = data.fd_out->signal.length * 4; // 2 x
> > upsampling + 16 to 32 bit
> >
> > data.chain = sox_create_effects_chain(&data.fd_in->encoding,
> > &data.fd_out->encoding);
> >
> > data.e = sox_create_effect(sox_find_effect("input"));
> > args[0] = (char *)data.fd_in, assert(sox_effect_options(data.e,
> 1, args)
> > == SOX_SUCCESS);
> > assert(sox_add_effect(data.chain, data.e, &data.fd_in->signal,
> > &data.fd_out->signal) == SOX_SUCCESS);
> > if (data.fd_in->signal.rate != data.fd_out->signal.rate)
> > {
> > std::cout << "signal.rate is processed!\n";
> > data.e = sox_create_effect(sox_find_effect("rate"));
> > args[0] = "-v", assert(sox_effect_options(data.e, 1, args) ==
> > SOX_SUCCESS); // VHQ
> > args[0] = "-b 99", assert(sox_effect_options(data.e, 1, args) ==
> > SOX_SUCCESS); // 95 (VHQ) to 99 % (-s)
> > args[0] = al, assert(sox_effect_options(data.e, 1, args) ==
> > SOX_SUCCESS); // Allow aliasing/imaging above the pass-band
> > args[0] = phase, assert(sox_effect_options(data.e, 1, args) ==
> > SOX_SUCCESS); // 0 = minimum, 25 = intermediate, 50 = linear
> > assert(sox_add_effect(data.chain, data.e, &data.fd_in->signal,
> > &data.fd_out->signal) == SOX_SUCCESS);
> > }
> > data.e = sox_create_effect(sox_find_effect("output"));
> > args[0] = (char *)data.fd_out, assert(sox_effect_options(data.e, 1,
> > args) == SOX_SUCCESS);
> > assert(sox_add_effect(data.chain, data.e, &data.fd_in->signal,
> > &data.fd_out->signal) == SOX_SUCCESS);
> >
> > sox_flow_effects(data.chain, NULL, NULL);
> >
> > -------------------------------------------------
> > -------------------------------------------------
> >
> > File : D:\Sox\temp.wav
> > Length : 110318252
> > RIFF : 60
> > WAVE
> > fmt : 40
> > Format : 0xFFFE => WAVE_FORMAT_EXTENSIBLE
> > Channels : 2
> > Sample Rate : 88200
> > Block Align : 8
> > Bit Width : 32
> > Bytes/sec : 705600
> > Valid Bits : 32
> > Channel Mask : 0x0 (should not be zero)
> > Subformat
> > esf_field1 : 0x1
> > esf_field2 : 0x0
> > esf_field3 : 0x10
> > esf_field4 : 0x80 0x0 0x0 0xAA 0x0 0x38 0x9B 0x71
> > format : pcm
> > fact : 4
> > frames : 0
> > data : 0
> > *** Unknown chunk marker (0) at position 80. Exiting parser.
> >
> > ----------------------------------------
> > Sample Rate : 88200
> > Frames : 0
> > Channels : 2
> > Format : 0x00130004
> > Sections : 1
> > Seekable : TRUE
> > Duration : 00:00:00.000
> > Signal Max : 0 (-1.#J dB)
> >
> >
> ------------------------------------------------------------------------------
> >
> > _______________________________________________
> > Sox-users mailing list
> > Sox...@li...
> <mailto:Sox...@li...>
> > https://lists.sourceforge.net/lists/listinfo/sox-users
> >
> >
>
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