Alert every two minutes of video

[falco2000]

Hello, I need to have an alert each time the playback position of a movie is a multiple of 2 minutes (i.e. at 0h2m0s, at 0h4m0s, at 0h6m0s, etc.). This alert should be acoustic, like a "beep", for example, or a flash of the computer screen. Is it possible and how? I need this alert because I'm using VLC to transcribe the speech of a video and I have to put timestamps in the text. Thank you very much.

[Rémi Denis-Courmont]

It should be possible with an audio filter to some extent.

[falco2000]

It should be possible with an audio filter to some extent.

You mean that I could:

1) create an audio track containing a beep every two minutes, with the same length of the movie
2) extract the audio track from the movie and merge it with the beep track
3) create a new movie with the new audio track and the old video track

Is it right? It's not very easy since the file is 20 GigaBytes large...

EDIT: I read your answer again and I realized that you probably meant something different... Did you think about a particular audio filter that I could try out?

[Rémi Denis-Courmont]

No. You'd need to write one.

[falco2000]

Ok, thank you for your help.