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How to create 300 sec files in continuous recording?

in Configuration Support

Hello everyone,

For French scientific monitoring, we have to program the audiomoths as follows:

sleep duration : 0 s
Recording duration : 300s
all the night (6pm - 8am)

So we create files of 300 s (5 min) in continuous recording.

Unfortunately I get files not necessarily "in the cycle" :

As you can see, the first file is correct: 7:10 p.m. to 7:15 p.m., but there is a "jump" from 7:15 p.m. to 7:25 p.m.

(if I understand it is the second of 7.15pm which causes the "problem"). The problem is that I lose the 5 min between 7.20pm and 7.25pm.

Do you have a solution to overcome this problem?

Thanks in advance!

Adrien CHARBONNEAU

4 answers10 replies

14 Comments

Adrien CHARBONNEAU

Jun 23, 2020

Thank you very much David Lee! It's perfect.

davidlee_malvern

Jun 23, 2020

@Adrien CHARBONNEAU

If you record a single long file you can split it into short individual wav files using Kaleidoscope from Wildlife Acoustics. Free download from www.wildlifeacoustics.com/account/downloads/kaleidoscope

Kaleidoscope will recognize the time in the AudioMoth filename and properly timestamp the resulting short files.

Alex Rogers

Jun 24, 2020

Replying to

Another option we were thinking of would be to add a 'chop up' function to the config app so that you can record continuously so not lose any time between periods. The problem is really that the sleep function is being used to divide up large files which wasn't really the original intent.

davidlee_malvern

Jun 22, 2020

The minimum sleep time has been increased to 5sec in the latest configuration app (1.3.2)

Adrien CHARBONNEAU

Jun 23, 2020

Replying to

Thanks for your reply, I understand.

Wim van Dam

Jun 22, 2020

Maybe the 0s sleep trips things up? What happens if you program it with 5 seconds of sleep and a recording duration of 295 seconds?

Wim van Dam

davidlee_malvern

Jun 23, 2020

Replying to

@Alex Rogers

Just how common is the "problem" that you have tried to solve with the increase in minimum sleep time? My experience has been that a 2 second sleep works perfectly and setting sleep to zero or 1 second defaults gracefully to a 2 second sleep. I've just confirmed this behaviour recording 15sec files at 256kHz on an AudioMoth v 1.0.0 running firmware 1.4.0 - and using a only a Sandisk Ultra SD card (32GB formatted exFAT). Can I suggest that you remove the 5sec limit but advise users to check the performance of their devices before deploying with sleep times less than 5sec.

Additionally there is an issue with the way that the 5sec limit has been applied in the config app. It is now impossible to type any number commencing with a digit less than 4. This nonsense means that the only way to enter - for example - a sleep time of 300 seconds is to enter either 59 or 500 and then scroll up or down using the arrow keys! ,

Adrien CHARBONNEAU

Jun 23, 2020

Replying to

Thank you very much Alex, it works perfectly!

Pierre

Jun 23, 2021

Replying to

@Adrien CHARBONNEAU You could schedule recording 3555s + 5s sleep.

Then split the wav files when retrieving them from SD card to disc. This can be done either with the tool in Configuration App or with a third party software (eg. Kaleidoscope). This can take some time though, depending on computer power and disc/memory performances.

That would loose recording only 5 seconds per hour.