multi-mixing and DBC_CHECK warning

[Pierre Muller-3]

Hi all,

I'm using ecasound to merge several wav files into few ones.
My problem is that when using the following command, resulting files are
partially blank (they contain several chunks of silence).
And the following message appears several times :
Warning: DBC_CHECK failed -
"little_endian_uint32(riff_format_rep.byte_second) ==
static_cast<uint32_t>(bytes_per_second())", audioio-wave.cpp, 369.

Any idea ?
Pierre

The command is : (to fill audio_1.wav  and audio_3.wav, and audio_4.wav) :
ecasound -q            -a:0 -i:audio111-2.wav -o:audio_1.wav -y:0.975
-t:60.576                  -a:1 -i:audio333-2.wav -o:audio_3.wav
-y:2.008 -t:39.703 -a:2 -i:audio333-3.wav -o:audio_3.wav -y:41.711
-t:5.185 -a:3 -i:audio333-4.wav -o:audio_3.wav -y:46.896 -t:6.502 -a:4
-i:audio333-5.wav -o:audio_3.wav -y:53.398 -t:12.16 -a:5
-i:audio333-6.wav -o:audio_3.wav -y:65.558 -t:7.139 -a:6
-i:audio333-7.wav -o:audio_3.wav -y:72.697 -t:10.207                    
-a:7 -i:audio444-2.wav -o:audio_4.wav -y:4.354 -t:22.943 -a:8
-i:audio444-3.wav -o:audio_4.wav -y:27.297 -t:3.618 -a:9
-i:audio444-4.wav -o:audio_4.wav -y:30.915 -t:3.955 -a:10
-i:audio444-5.wav -o:audio_4.wav -y:34.87 -t:3.556 -a:11
-i:audio444-6.wav -o:audio_4.wav -y:38.426 -t:3.44 -a:12
-i:audio444-7.wav -o:audio_4.wav -y:41.866 -t:3.678 -a:13
-i:audio444-8.wav -o:audio_4.wav -y:45.544 -t:4.926 -a:14
-i:audio444-9.wav -o:audio_4.wav -y:50.47 -t:3.39 -a:15
-i:audio444-10.wav -o:audio_4.wav -y:53.86 -t:3.211 -a:16
-i:audio444-11.wav -o:audio_4.wav -y:57.071 -t:5.591 -a:17
-i:audio444-12.wav -o:audio_4.wav -y:62.662 -t:4.776 -a:18
-i:audio444-13.wav -o:audio_4.wav -y:67.438 -t:11.211 -a:19
-i:audio444-14.wav -o:audio_4.wav -y:78.649 -t:3.609

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[Kai Vehmanen]

Hi,

btw, my last message to ecasound-list today, I promise! :)

On Mon, 21 May 2007, Pierre Muller wrote:

> I'm using ecasound to merge several wav files into few ones.
> My problem is that when using the following command, resulting files are
> partially blank (they contain several chunks of silence).

Let's see...

> ecasound -q            -a:0 -i:audio111-2.wav -o:audio_1.wav -y:0.975
> -t:60.576                  -a:1 -i:audio333-2.wav -o:audio_3.wav
> -y:2.008 -t:39.703 -a:2 -i:audio333-3.wav -o:audio_3.wav -y:41.711
> -t:5.185 -a:3 -i:audio333-4.wav -o:audio_3.wav -y:46.896 -t:6.502 -a:4

This doesn't quite work as '-t:xxx' is a global setting (unlike '-y'
which is applied to one file only). So you specify one '-t' for each file,
but in practise only the last '-t' will have any effect.

> And the following message appears several times :
> Warning: DBC_CHECK failed -
> "little_endian_uint32(riff_format_rep.byte_second) ==
> static_cast<uint32_t>(bytes_per_second())", audioio-wave.cpp, 369.

I think this is a separate issue. It would seem the RIFF WAVE headers are
not fully valid. How have you created the input .wav files?

Br, Kai

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