Dahua DHI-VTH2421FW-P - reduce the ring time !?

F

federico12345

n3wb
Sep 10, 2022
1
0
Italy
Hi everyone, my Dahua DHI-VTH2421FW-P model is driving me crazy. It is not possible to reduce the duration of the alarm below 15 seconds through the settings.
It is unacceptable, if someone rings the doorbell you don't need to ring continuously for 15 seconds, a single sound is enough to not disturb.


There are only two ringtones by default. I tried to replace them by adding a new ringtone. There are many limitations to doing this through the micro SD card. The file must be PCM audio under 100Kb (it's crazy)
I tried to get around the limitations by creating a very compressed 15 second long PCM file. The first two seconds have audio, the rest are blank. The problem is that the sound still plays in a loop, I've tried everything.

Is it possible to get around this problem? Is there an applicable solution? Thanks for the support
 
Hi,
this is exaclty what I'm looking for. I also tried a 15 second file with a blank part with no success.
It would be so easy if there was a setting to play the file only once.
Any solutions?

Thank you!
 
Yes very annoying. I'm running the android version of the Dahua VTH and have the same issue.
I can't get it to update the ring tone either, the procedure must be different to the Linux VTH.
 
I have a theoretical solution. Folks have mentioned they put a trailing BLANK audio space for the final 13 seconds or so of the replacement PCM audio ringtone. The software is evidently smart enough to detect that there is no audio present for the final 13 seconds of the ringtone. My idea is to trick the software into playing the extra 13 seconds of what you want to hear - which in this case is nothing.

Instead of a trailing BLANK audio, insert a very low volume (almost inaudible or perhaps even inaudible) static noise to the end of the track. The software should be able to read the noise and therefore "play" through to the end to get to it.

If that doesn't work, add an audible tone to the very end of the audio track. If you find that the software is skipping over the blank section in the middle, then add a very low static noise throughout the the trailing 13 seconds. You can experiment to find out how low you can go before the software stops detecting the presence of audio. My guess is near-zero; blank audio has no bits of information present, so it is skipped over. Near-zero inaudible noise has bits, so it should get played.
 
noco said:
I tried that. The software speeds up the new file to the old length and plays it several times.
Click to expand...


it skipped over quiet noise? or it skipped over blank audio?

If the latter, change the blank audio to quiet noise.

If the former, change the quiet noise to louder noise until it registers and plays it.

Also, my solution is based on the assumption that you are replacing a 15 second ringtone with a 15 second audio clip of your own. Your audio clip should be maybe a 2 second ringtone followed by 13 seconds of inaudible audio.
 
It was neither one nor the other. It accelerated the 15 second file and played it several times within a shorter time to get the 15 seconds full.

The original ringtone isn't 15 seconds, it's less and is played several times to fill up the 15 seconds.
 
noco said:
It was neither one nor the other. It accelerated the 15 second file and played it several times within a shorter time to get the 15 seconds full.

The original ringtone isn't 15 seconds, it's less and is played several times to fill up the 15 seconds.
Click to expand...

That's bananas.

How are you modifying the ringtone? Replacing the existing file? Or are you using this method: How to use a custom ring tone on a Dahua VTH
 
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