Re: stretching files, unexpected duration after stretching file

Am 2025-01-13 21:19, schrieb Jan Stary:
> On Jan 13 20:07:12, [email protected] wrote:
>> I use sox for converting and merging vox-files in a shell script. But 
>> the
>> vox files often have different duration in seconds and I want to make 
>> sure
>> that the shorter file always has the duration of the longer file 
>> before
>> merging.
> 
> Why? You are not telling the whole story.

My fantasy story for you is: I work for the German secret service and 
monitor telephone conversations. The VOX files contain the recordings 
from side A and B respectively. Unfortunately, the technology is not 
perfect. For some reason, the recording of side A is usually somewhat 
slower, probably due to asynchronous processes in the background. In a 
42-minute conversation, the difference _can_ be up to 20 seconds. That's 
why I try to stretch the recording with the shorter duration to the 
duration of the longer recording in order to get the dialog in sync.

The individual files are mono and with the merging it remains mono.

I had already tried the tempo option, but that didn't work at all. 
Stretching is not worthwhile when the difference is so small. A certain 
tolerance can be taken into account. However, I will make it dependent 
on the length in future.

chatgpt is an ideal helper (albeit with flaws) who doesn't ask 
superfluous questions and always tries to offer individual solutions and 
even spreads good vibes. I can't say that your text puts me in a good 
mood ;-) But thank you for taking the trouble to reply. It would have 
been your chance to show that humans can still be smarter than AI :) 
I'll keep experimenting with it until the result is perfect.