record 6.0.0

Audio recorder from microphone to file or stream with multiple codecs, bit rate and sampling rate options.

Audio recorder from microphone to a given file path or stream.

No external dependencies:

• On Android, AudioRecord and MediaCodec or MediaRecorder.
• On iOS and macOS, AVFoundation.
• On Windows, MediaFoundation.
• On web, well... your browser! (and its underlying platform).

External dependencies:

• On linux, encoding is provided by parecord and ffmpeg. It must be installed separately.

Platform feature parity matrix

Feature	Android	iOS	web	Windows	macOS	linux
pause/resume	✔️	✔️	✔️	✔️	✔️	✔️
amplitude(dBFS)	✔️	✔️	✔️	✔️	✔️
permission check	✔️	✔️	✔️		✔️
num of channels	✔️	✔️	✔️	✔️	✔️	✔️
device selection	✔️ 1 / 2	(auto BT/mic)	✔️	✔️	✔️	✔️
auto gain	✔️ 2	✔️ 3	✔️		✔️ 3
echo cancel	✔️ 2	✔️ 3	✔️		✔️ 3
noise suppresion	✔️ 2		✔️

File

Encoder	Android	iOS	web	Windows	macOS	linux
aacLc	✔️	✔️	?	✔️	✔️	✔️
aacEld	✔️	✔️	?		✔️
aacHe	✔️		?
amrNb	✔️		?	✔️
amrWb	✔️		?
opus	✔️		?			✔️
wav	✔️ 2	✔️	✔️	✔️	✔️	✔️
flac	✔️ 2	✔️	?	✔️	✔️	✔️
pcm16bits	✔️ 2	✔️	✔️	✔️	✔️

?: from my testings:

Encoder	Firefox	Chrome based	Safari
aacLc			✔️*
opus	✔️*	✔️*
wav	✔️	✔️	✔️
pcm16bits	✔️	✔️	✔️

* Sample rate output is determined by your settings in OS. Bit depth is likely 32 bits.

wav and pcm16bits are provided by the package directly.

Stream

Encoder	Android	iOS	web	Windows	macOS	linux
aacLc *	✔️ 2
aacEld *	✔️ 2
aacHe *	✔️ 2
pcm16bits	✔️ 2	✔️	✔️	✔️	✔️

* AAC is streamed with raw AAC with ADTS headers, so it's directly readable through a file!

1. Bluetooth telephony device link (SCO) is automatically done but there's no phone call management.
2. Unsupported on legacy Android recorder.
3. Stream mode only.

Usage

import 'package:record/record.dart';

final record = AudioRecorder();

// Check and request permission if needed
if (await record.hasPermission()) {
  // Start recording to file
  await record.start(const RecordConfig(), path: 'aFullPath/myFile.m4a');
  // ... or to stream
  final stream = await record.startStream(const RecordConfig(encoder: AudioEncoder.pcm16bits));
}

// Stop recording...
final path = await record.stop();
// ... or cancel it (and implicitly remove file/blob).
await record.cancel();

record.dispose(); // As always, don't forget this one.

Setup, permissions and others

Android

Setup.

• min SDK: 23 (amrNb/amrWb: 26, Opus: 29)

iOS

<key>NSMicrophoneUsageDescription</key>
<string>Some message to describe why you need this permission</string>

• min SDK: 12.0

macOS

<key>NSMicrophoneUsageDescription</key>
<string>Some message to describe why you need this permission</string>

• In capabilities, activate "Audio input" in debug AND release schemes.
• or directly in *.entitlements files

<key>com.apple.security.device.audio-input</key>
<true/>

• min SDK: 10.15