Get the audio duration using libsndfile

Question

I created an application using libsndfile and wasapi, it allows playing an audio file slowly and manually with the cursor using QSlider.

I see that libsndfile uses frames, I want to know how to get the duration of this audio file but I can not find it in the documentation of libsndfile and play parts of the audio file using ms.

I managed to make it work with the frames but I want to understand how to do it with the milliseconds.

score 5 · Accepted Answer · answered Nov 16 '18 at 13:57

5

The objects libsndfile creates have a frames() method that gives you this information. samplerate() gives you the sampling rate, so then the duration is:

static_cast<double>(frames())/samplerate()

answered Nov 16 '18 at 13:57

Matthieu Brucher

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Thank you for your answer, so if it returns 0.834, that means 834 ms, right? – IT World Nov 16 '18 at 14:10
yes, exactly. Samplerate is samples per sec, frames are samples, so you get an answer in seconds. – Matthieu Brucher Nov 16 '18 at 14:11

Get the audio duration using libsndfile

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