CODEWITHSUNDEEP
iosobjective-cxcodeaudio-recording
Abin George
Abin George

Reputation: 654

convert audio to lower sampling rate

I am using AVRecorder to save recording and AVAssetExportsession to append multiple files. But output of the Exportsession is too large.

So I would like to convert it to a lower size before uploading it to the server. How can I convert this to a lower sampling rate.

Upvotes: 1

Views: 1507

Answers (1)

jnpdx
jnpdx

Reputation: 52347

Use AVAssetWriter (Apple docs: https://developer.apple.com/library/mac/documentation/AVFoundation/Reference/AVAssetWriter_Class/index.html), which will allow you to choose bitrate/channel/etc options for the file.

This related question (AVAssetWriter How to write down-sampled/compressed m4a/mp3 files) has a full code sample using AVAssetWriter if you need that -- be sure, of course, to take note of the answer to that question, in regards to locations for the exported file.

Upvotes: 2

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