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mvanbeusekomEgor
mvanbeusekom
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Egor
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[camera] Set audio encoding bitrate when recording video (flutter#3124)
Fixes flutter/flutter#38787
1 parent 71d966a commit fb157ec

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7 files changed

+189
-19
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7 files changed

+189
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‎packages/camera/CHANGELOG.md

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## 0.5.8+8
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* Fixed garbled audio (in video) by setting audio encoding bitrate.
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## 0.5.8+7
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* Keep handling deprecated Android v1 classes for backward compatibility.

‎packages/camera/android/build.gradle

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@@ -51,4 +51,5 @@ android {
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dependencies {
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testImplementation 'junit:junit:4.12'
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testImplementation 'org.mockito:mockito-core:3.5.13'
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}

‎packages/camera/android/src/main/java/io/flutter/plugins/camera/Camera.java

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@@ -28,6 +28,7 @@
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import androidx.annotation.NonNull;
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import io.flutter.plugin.common.EventChannel;
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import io.flutter.plugin.common.MethodChannel.Result;
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import io.flutter.plugins.camera.media.MediaRecorderBuilder;
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import io.flutter.view.TextureRegistry.SurfaceTextureEntry;
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import java.io.File;
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import java.io.FileOutputStream;
@@ -82,7 +83,6 @@ public Camera(
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if (activity == null) {
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throw new IllegalStateException("No activity available!");
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}
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this.cameraName = cameraName;
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this.enableAudio = enableAudio;
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this.flutterTexture = flutterTexture;
@@ -120,23 +120,12 @@ private void prepareMediaRecorder(String outputFilePath) throws IOException {
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if (mediaRecorder != null) {
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mediaRecorder.release();
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}
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mediaRecorder = new MediaRecorder();
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// There's a specific order that mediaRecorder expects. Do not change the order
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// of these function calls.
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if (enableAudio) mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
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mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
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mediaRecorder.setOutputFormat(recordingProfile.fileFormat);
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if (enableAudio) mediaRecorder.setAudioEncoder(recordingProfile.audioCodec);
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mediaRecorder.setVideoEncoder(recordingProfile.videoCodec);
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mediaRecorder.setVideoEncodingBitRate(recordingProfile.videoBitRate);
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if (enableAudio) mediaRecorder.setAudioSamplingRate(recordingProfile.audioSampleRate);
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mediaRecorder.setVideoFrameRate(recordingProfile.videoFrameRate);
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mediaRecorder.setVideoSize(recordingProfile.videoFrameWidth, recordingProfile.videoFrameHeight);
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mediaRecorder.setOutputFile(outputFilePath);
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mediaRecorder.setOrientationHint(getMediaOrientation());
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mediaRecorder.prepare();
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mediaRecorder =
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new MediaRecorderBuilder(recordingProfile, outputFilePath)
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.setEnableAudio(enableAudio)
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.setMediaOrientation(getMediaOrientation())
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.build();
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}
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@SuppressLint("MissingPermission")

‎packages/camera/android/src/main/java/io/flutter/plugins/camera/media/MediaRecorderBuilder.java

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// Copyright 2019 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package io.flutter.plugins.camera.media;
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import android.media.CamcorderProfile;
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import android.media.MediaRecorder;
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import androidx.annotation.NonNull;
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import java.io.IOException;
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public class MediaRecorderBuilder {
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static class MediaRecorderFactory {
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MediaRecorder makeMediaRecorder() {
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return new MediaRecorder();
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}
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}
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private final String outputFilePath;
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private final CamcorderProfile recordingProfile;
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private final MediaRecorderFactory recorderFactory;
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private boolean enableAudio;
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private int mediaOrientation;
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public MediaRecorderBuilder(
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@NonNull CamcorderProfile recordingProfile, @NonNull String outputFilePath) {
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this(recordingProfile, outputFilePath, new MediaRecorderFactory());
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}
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MediaRecorderBuilder(
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@NonNull CamcorderProfile recordingProfile,
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@NonNull String outputFilePath,
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MediaRecorderFactory helper) {
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this.outputFilePath = outputFilePath;
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this.recordingProfile = recordingProfile;
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this.recorderFactory = helper;
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}
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public MediaRecorderBuilder setEnableAudio(boolean enableAudio) {
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this.enableAudio = enableAudio;
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return this;
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}
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public MediaRecorderBuilder setMediaOrientation(int orientation) {
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this.mediaOrientation = orientation;
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return this;
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}
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public MediaRecorder build() throws IOException {
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MediaRecorder mediaRecorder = recorderFactory.makeMediaRecorder();
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// There's a specific order that mediaRecorder expects. Do not change the order
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// of these function calls.
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if (enableAudio) {
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mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
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mediaRecorder.setAudioEncodingBitRate(recordingProfile.audioBitRate);
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}
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mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
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mediaRecorder.setOutputFormat(recordingProfile.fileFormat);
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if (enableAudio) mediaRecorder.setAudioEncoder(recordingProfile.audioCodec);
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mediaRecorder.setVideoEncoder(recordingProfile.videoCodec);
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mediaRecorder.setVideoEncodingBitRate(recordingProfile.videoBitRate);
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if (enableAudio) mediaRecorder.setAudioSamplingRate(recordingProfile.audioSampleRate);
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mediaRecorder.setVideoFrameRate(recordingProfile.videoFrameRate);
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mediaRecorder.setVideoSize(recordingProfile.videoFrameWidth, recordingProfile.videoFrameHeight);
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mediaRecorder.setOutputFile(outputFilePath);
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mediaRecorder.setOrientationHint(this.mediaOrientation);
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mediaRecorder.prepare();
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return mediaRecorder;
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}
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}

‎packages/camera/android/src/test/java/io/flutter/plugins/camera/DartMessengerTest.java

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@@ -95,6 +95,7 @@ public void sendCameraClosingEvent() {
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private Map<String, String> decodeSentMessage(ByteBuffer sentMessage) {
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sentMessage.position(0);
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//noinspection unchecked
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return (Map<String, String>) StandardMethodCodec.INSTANCE.decodeEnvelope(sentMessage);
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}
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‎packages/camera/android/src/test/java/io/flutter/plugins/camera/media/MediaRecorderBuilderTest.java

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package io.flutter.plugins.camera.media;
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import static org.junit.Assert.assertNotNull;
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import static org.mockito.Mockito.*;
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import android.media.CamcorderProfile;
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import android.media.MediaRecorder;
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import java.io.IOException;
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import java.lang.reflect.Constructor;
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import org.junit.Test;
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import org.mockito.InOrder;
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public class MediaRecorderBuilderTest {
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@Test
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public void ctor_test() {
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MediaRecorderBuilder builder =
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new MediaRecorderBuilder(CamcorderProfile.get(CamcorderProfile.QUALITY_1080P), "");
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assertNotNull(builder);
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}
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@Test
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public void build_Should_set_values_in_correct_order_When_audio_is_disabled() throws IOException {
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CamcorderProfile recorderProfile = getEmptyCamcorderProfile();
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MediaRecorderBuilder.MediaRecorderFactory mockFactory =
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mock(MediaRecorderBuilder.MediaRecorderFactory.class);
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MediaRecorder mockMediaRecorder = mock(MediaRecorder.class);
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String outputFilePath = "mock_video_file_path";
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int mediaOrientation = 1;
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MediaRecorderBuilder builder =
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new MediaRecorderBuilder(recorderProfile, outputFilePath, mockFactory)
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.setEnableAudio(false)
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.setMediaOrientation(mediaOrientation);
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when(mockFactory.makeMediaRecorder()).thenReturn(mockMediaRecorder);
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MediaRecorder recorder = builder.build();
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InOrder inOrder = inOrder(recorder);
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inOrder.verify(recorder).setVideoSource(MediaRecorder.VideoSource.SURFACE);
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inOrder.verify(recorder).setOutputFormat(recorderProfile.fileFormat);
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inOrder.verify(recorder).setVideoEncoder(recorderProfile.videoCodec);
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inOrder.verify(recorder).setVideoEncodingBitRate(recorderProfile.videoBitRate);
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inOrder.verify(recorder).setVideoFrameRate(recorderProfile.videoFrameRate);
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inOrder
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.verify(recorder)
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.setVideoSize(recorderProfile.videoFrameWidth, recorderProfile.videoFrameHeight);
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inOrder.verify(recorder).setOutputFile(outputFilePath);
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inOrder.verify(recorder).setOrientationHint(mediaOrientation);
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inOrder.verify(recorder).prepare();
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}
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@Test
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public void build_Should_set_values_in_correct_order_When_audio_is_enabled() throws IOException {
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CamcorderProfile recorderProfile = getEmptyCamcorderProfile();
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MediaRecorderBuilder.MediaRecorderFactory mockFactory =
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mock(MediaRecorderBuilder.MediaRecorderFactory.class);
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MediaRecorder mockMediaRecorder = mock(MediaRecorder.class);
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String outputFilePath = "mock_video_file_path";
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int mediaOrientation = 1;
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MediaRecorderBuilder builder =
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new MediaRecorderBuilder(recorderProfile, outputFilePath, mockFactory)
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.setEnableAudio(true)
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.setMediaOrientation(mediaOrientation);
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when(mockFactory.makeMediaRecorder()).thenReturn(mockMediaRecorder);
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MediaRecorder recorder = builder.build();
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InOrder inOrder = inOrder(recorder);
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inOrder.verify(recorder).setAudioSource(MediaRecorder.AudioSource.MIC);
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inOrder.verify(recorder).setAudioEncodingBitRate(recorderProfile.audioBitRate);
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inOrder.verify(recorder).setVideoSource(MediaRecorder.VideoSource.SURFACE);
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inOrder.verify(recorder).setOutputFormat(recorderProfile.fileFormat);
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inOrder.verify(recorder).setAudioEncoder(recorderProfile.audioCodec);
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inOrder.verify(recorder).setVideoEncoder(recorderProfile.videoCodec);
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inOrder.verify(recorder).setVideoEncodingBitRate(recorderProfile.videoBitRate);
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inOrder.verify(recorder).setAudioSamplingRate(recorderProfile.audioSampleRate);
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inOrder.verify(recorder).setVideoFrameRate(recorderProfile.videoFrameRate);
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inOrder
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.verify(recorder)
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.setVideoSize(recorderProfile.videoFrameWidth, recorderProfile.videoFrameHeight);
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inOrder.verify(recorder).setOutputFile(outputFilePath);
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inOrder.verify(recorder).setOrientationHint(mediaOrientation);
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inOrder.verify(recorder).prepare();
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}
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private CamcorderProfile getEmptyCamcorderProfile() {
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try {
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Constructor<CamcorderProfile> constructor =
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CamcorderProfile.class.getDeclaredConstructor(
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int.class, int.class, int.class, int.class, int.class, int.class, int.class,
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int.class, int.class, int.class, int.class, int.class);
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constructor.setAccessible(true);
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return constructor.newInstance(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
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} catch (Exception ignored) {
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}
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return null;
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}
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}

‎packages/camera/pubspec.yaml

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description: A Flutter plugin for getting information about and controlling the
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camera on Android and iOS. Supports previewing the camera feed, capturing images, capturing video,
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and streaming image buffers to dart.
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version: 0.5.8+7
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version: 0.5.8+8
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homepage: https://github.com/flutter/plugins/tree/master/packages/camera
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