Re: [EXTERNAL] Re: "norm" effect causes intermittent truncation of MP3 output.

[Scott Temby <scottt@damsmart.com.au>]

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Thanks Peter,

I'm aware of the frame/chunk granularity at the end, I'm talking about serious truncation, e.g. 30min input wav, with a 4 minute MP3. Without the "norm" argument, everything reliably processes as expected.

Cheers,
Scott


On 18 Jun. 2021, 1:54 am, at 1:54 am, "Peter P." <peterparker@fastmail.com> wrote:
>Hi Scott,
>
>encountered a similar thing and was told that the file length of mp3
>files has a lower resolution as it stores data in chunks. If your .wav
>is a bit longer than the mp3 but not long enough to fill up another
>chunk at the end this might get discarded. Don't quote me on this, just
>remembering something I asked here years ago...
>
>* Scott Temby <scottt@damsmart.com.au> [2021-06-17 16:03]:
>> Hi,
>>
>> When using "sox.exe *<source_file>.wav* -C 192.01
>> *<destination_file>.mp3* norm"
>> I've found the output is occasionally truncated (shorter duration
>than the
>> input, but matches up to that point).
>>
>> I've tried this on a few systems, and while the fault is intermittent
>(not
>> linked to any particular input file or condition), it does repeatedly
>occur
>> (a few times in a "batch"). Immediately re-processing the same input
>files
>> often yields success, or at least, failures on different files. I've
>also
>> tried -C 192.2 to see if that was the issue, and it is not. removing
>"norm"
>> solves the problem, and I can reliably encode thousands of files
>without
>> truncation.
>>
>> Hopefully there's an easy fix, if not, at least you are now aware of
>the
>> issue.
>>
>> Regards,
>> Scott
>
>
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