Get the audio duration using libsndfile
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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.
c++ libsndfile
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
asked Nov 16 '18 at 13:34
IT WorldIT World
677
add a comment |
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.
c++ libsndfile
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
asked Nov 16 '18 at 13:34
IT WorldIT World
677
add a comment |
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.
c++ libsndfile
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
asked Nov 16 '18 at 13:34
IT WorldIT World
677
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.
c++ libsndfile
c++ libsndfile
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
asked Nov 16 '18 at 13:34
IT WorldIT World
677
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
asked Nov 16 '18 at 13:34
IT WorldIT World
677
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
edited Nov 16 '18 at 13:58
Matthieu Brucher
17.4k42345
17.4k42345
asked Nov 16 '18 at 13:34
IT WorldIT World
677
asked Nov 16 '18 at 13:34
IT WorldIT World
677
asked Nov 16 '18 at 13:34
IT WorldIT World
677
677
add a comment |
add a comment |
1 Answer
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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 BrucherMatthieu Brucher
17.4k42345
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
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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oldest
votes
active
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votes
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 BrucherMatthieu Brucher
17.4k42345
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
add a comment |
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 BrucherMatthieu Brucher
17.4k42345
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
add a comment |
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 BrucherMatthieu Brucher
17.4k42345
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 BrucherMatthieu Brucher
17.4k42345
answered Nov 16 '18 at 13:57
Matthieu BrucherMatthieu Brucher
17.4k42345
answered Nov 16 '18 at 13:57
Matthieu BrucherMatthieu Brucher
17.4k42345
answered Nov 16 '18 at 13:57
Matthieu BrucherMatthieu Brucher
17.4k42345
17.4k42345
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
add a comment |
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
Thank you for your answer, so if it returns 0.834, that means 834 ms, right?
– IT World
Nov 16 '18 at 14:10
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
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
add a comment |
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