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I deployed some passive acoustic devices to record bird song, and I am using birdNET for the first time. I downloaded the Windows version of the app, set the parameters I preferred and, after running a .wav file, this is what I get:

enter image description here

Is there any way to automatically reference each frame to start time of the file in excel or R instead of getting the start and end of each frame in seconds? I am using GUI, with the following settings: minimum conf: 0.5, Sensitivity : 1, Overlap: 0., species by location. Latitude: 43, Longitude: -110, Week: 24

Thank you!

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  • $\begingroup$ extrapolate with respect to which time? I guess you mean to reference each frame to start time of the file, which would not call extrapolate. Please clarify. $\endgroup$
    – WMXZ
    Commented Oct 9, 2023 at 6:29
  • $\begingroup$ Thanks for the comment @WMXZ, I've edited my question accordingly. $\endgroup$
    – Parus major
    Commented Oct 9, 2023 at 14:04
  • $\begingroup$ Could you please add, how you invoke Birdnet (CLI or GUI) and if CLI which parameter and for GUI which parameter settigs? $\endgroup$
    – WMXZ
    Commented Oct 9, 2023 at 16:31
  • $\begingroup$ Thanks, question edited again with these details. $\endgroup$
    – Parus major
    Commented Oct 13, 2023 at 18:34

2 Answers 2

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And if you wanted to do that "automatically" you could just use your favourite programming language or even Excel. In R, using the lubridate package, you would set the start Date_Time of the recording as a ymd_hms object like floor_time = lubridate::ymd_hms(name_of_your_file)

set the start and end time as lubridate-time objects alike.

datetime_start = lubridate::ymd_hms(paste(date, time_start)

the you can just add them to your start_date_time with a +. datetime_start = (floor_time + datetime_start)

hope that helps.

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  • $\begingroup$ Thank you very much for the suggestion, that was very helpful! :) $\endgroup$
    – Parus major
    Commented Dec 5, 2023 at 3:57
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In order to "...automatically reference each frame to start time of the file..." you have to know the start time of that file (well, duh!). Fortunately, sound files commonly include that information as part of their filename.

For example, I was recently asked to analyze a sound file with the following filename:

SWIFT #2_96K_20200621_172433.wav

Note the bolded portion, which contains the date_time that the recording started. This recording started on June 21, 2020 at 24 minutes and 33 seconds after 5 pm. The field recorder automatically appended that information to the filename as yyyymmdd_hhmmss, where:

yyyy = year
mm = month
dd = day
hh = hour (24)
mm = minute
ss = second

If this file contained a sound that had a start time of 14 seconds, then that time is simply added to the filename's date_time. In this case that sound would have started on June 21, 2020 at 24 minutes and 47 seconds after 5 pm.

AFAIK, most field recorders automatically include the starting date_time as part of the filename. If your sound files do not include this, then you'll need to locate some metadata that includes the recording's start time. Failing that, I don't know how you would be able to determine a start time...

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