* convert wav to ogg twice produces diffrent binary files
@ 2017-10-14 16:16 Dennis Muratshin
2017-10-15 18:52 ` Måns Rullgård
0 siblings, 1 reply; 4+ messages in thread
From: Dennis Muratshin @ 2017-10-14 16:16 UTC (permalink / raw)
To: sox-users
for example run these commands:
sox.exe src.wav dest1.ogg -G rate 44100
sox.exe src.wav dest2.ogg -G rate 44100
It will produce two files with small difference between them:
http://prntscr.com/gxdifd
Is there any way to avoid it?
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: convert wav to ogg twice produces diffrent binary files
2017-10-14 16:16 convert wav to ogg twice produces diffrent binary files Dennis Muratshin
@ 2017-10-15 18:52 ` Måns Rullgård
2017-10-15 20:44 ` Jeremy Nicoll - ml sox users
2017-10-16 13:54 ` Dennis Muratshin
0 siblings, 2 replies; 4+ messages in thread
From: Måns Rullgård @ 2017-10-15 18:52 UTC (permalink / raw)
To: Dennis Muratshin; +Cc: sox-users
Dennis Muratshin <frankinshtein85@gmail.com> writes:
> for example run these commands:
>
> sox.exe src.wav dest1.ogg -G rate 44100
> sox.exe src.wav dest2.ogg -G rate 44100
>
> It will produce two files with small difference between them:
> http://prntscr.com/gxdifd
> Is there any way to avoid it?
It could be due to dither. Try the -R option to use a fixed seed for
the random number generator.
--
Måns Rullgård
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* Re: convert wav to ogg twice produces diffrent binary files
2017-10-15 18:52 ` Måns Rullgård
@ 2017-10-15 20:44 ` Jeremy Nicoll - ml sox users
2017-10-16 13:54 ` Dennis Muratshin
1 sibling, 0 replies; 4+ messages in thread
From: Jeremy Nicoll - ml sox users @ 2017-10-15 20:44 UTC (permalink / raw)
To: sox-users
On 2017-10-15 19:52, Måns Rullgård wrote:
> Dennis Muratshin <frankinshtein85@gmail.com> writes:
>
>> for example run these commands:
>>
>> sox.exe src.wav dest1.ogg -G rate 44100
>> sox.exe src.wav dest2.ogg -G rate 44100
>>
>> It will produce two files with small difference between them:
>> http://prntscr.com/gxdifd
>> Is there any way to avoid it?
>
> It could be due to dither. Try the -R option to use a fixed seed for
> the random number generator.
It's hard to tell from the screenshot how big the files are... but they
look as if they might be tiny. The line 1 difference might I guess be
a date/time stamp, if the file format allows that.
Then ... do we have just one or two 'frames' (if that's an appropriate
term) of audio? Might they also have a date/time stamp in them?
I'd have thought a dither difference would affect many bytes in the
audio
stream, but then again maybe that depends on what the audio in the file
actually is - silence, test tones, real music?
--
Jeremy Nicoll - my opinions are my own
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: convert wav to ogg twice produces diffrent binary files
2017-10-15 18:52 ` Måns Rullgård
2017-10-15 20:44 ` Jeremy Nicoll - ml sox users
@ 2017-10-16 13:54 ` Dennis Muratshin
1 sibling, 0 replies; 4+ messages in thread
From: Dennis Muratshin @ 2017-10-16 13:54 UTC (permalink / raw)
To: Måns Rullgård; +Cc: sox-users
Thank you! '-R' option helped. Now files are identical:
sox -R src.wav dest1.ogg -G rate 44100
sox -R src.wav dest1.ogg -G rate 44100
15.10.2017 23:52, Måns Rullgård пишет:
> Dennis Muratshin <frankinshtein85@gmail.com> writes:
>
>> for example run these commands:
>>
>> sox.exe src.wav dest1.ogg -G rate 44100
>> sox.exe src.wav dest2.ogg -G rate 44100
>>
>> It will produce two files with small difference between them:
>> http://prntscr.com/gxdifd
>> Is there any way to avoid it?
> It could be due to dither. Try the -R option to use a fixed seed for
> the random number generator.
>
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2017-10-14 16:16 convert wav to ogg twice produces diffrent binary files Dennis Muratshin
2017-10-15 18:52 ` Måns Rullgård
2017-10-15 20:44 ` Jeremy Nicoll - ml sox users
2017-10-16 13:54 ` Dennis Muratshin
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