Retrieve audio duration from kbps and size

Question

I have this data:

Bit speed: 276 kilobytes/seconds
File size: 6.17 MB
Channels: 2
Layer: 3
Frequency: 44100 HZ

How can I retrieve the audio duration in seconds or milliseconds?

If you can open the file then you can find the real uncompressed length inside the headers. — Dominique Lorre, Sep 26 '16 at 22:01

score 0 · Answer 1 · answered Sep 26 '16 at 21:32

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You can't. To get the duration you need the sampling rate in samples per second but also the number of channels (mono, stereo, etc.), and the sample length in bytes (1 to 3 usually). And unless it is a raw audio there is also additional data that takes some space. 276kpbs does not help here. If it is a mP3 the file is compressed, you simply can't just by looking at the file size.

answered Sep 26 '16 at 21:32

Dominique Lorre

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Ok, I have both channels and sample lenght – Salvo Matteini Sep 26 '16 at 21:39
@SalvoMatteini what is the file type? mp3, wav, aiff, ogg? – Dominique Lorre Sep 26 '16 at 21:48
is a mpeg layer 3 – Salvo Matteini Sep 26 '16 at 21:52
You can't, all you can do is to make an [educated guess](http://stackoverflow.com/questions/29494827/calculate-mp3-duration-based-on-bitrate-and-file-size) – Dominique Lorre Sep 26 '16 at 21:55

Retrieve audio duration from kbps and size

1 Answers1