Re: [SoX-users] Unknown chunk marker in WAV

[TJF <tjf...@we...>]

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)
>
> ------------------------------------------------------------------------------
>
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