基于騰訊云播放器封裝的Flutter Video Player插件
項(xiàng)目github地址：https://github.com/RandyWei/flt_video_player
Flutter版本現(xiàn)在已經(jīng)更新到了v1.5.4-hotfix.2，在國(guó)內(nèi)也越來(lái)越火冲呢。
在之前項(xiàng)目中有視頻播放功能舍败，使用了flutter官方出的video_player庫(kù)完成實(shí)現(xiàn)。flutter官方所有插件碗硬，詳見(jiàn)https://github.com/flutter/plugins
官方的video_player瓤湘，安卓是基于ExoPlayer，蘋果是基于原生的AVPlayer恩尾，目前項(xiàng)目使用中也沒(méi)什么毛病弛说。
在閑暇之余，出于學(xué)習(xí)開(kāi)發(fā)flutter plugin目的翰意，基于騰訊云(https://cloud.tencent.com/document/product/881)播放器封裝了一個(gè)flutter視頻播放器木人。
目前項(xiàng)目在開(kāi)發(fā)測(cè)試階段，還沒(méi)發(fā)布到pub平臺(tái)上冀偶，可通過(guò)git配置使用醒第。
項(xiàng)目github地址：https://github.com/RandyWei/flt_video_player
播放器開(kāi)放了部分騰訊云播放器的功能，如：倍速进鸠、靜音等稠曼。
參考資料:
https://github.com/An-uking/Flutter_IJKPlayer
https://github.com/CaiJingLong/flutter_ijkplayer
https://github.com/flutter/plugins/tree/master/packages/video_player
在項(xiàng)目開(kāi)發(fā)過(guò)程中碰到了以下問(wèn)題，作了一下總結(jié)：
1客年、出現(xiàn)label標(biāo)簽沖突問(wèn)題霞幅，如下錯(cuò)誤
Attribute application@label value=(flutter_plugin_demo_example) from AndroidManifest.xml:13:9-52is also present at [LiteAVSDK_Player_6.3.7089.aar] AndroidManifest.xml:19:9-41 value=(@string/app_name).Suggestion: add 'tools:replace="android:label"' to <application> element at AndroidManifest.xml:11:5-35:19 to override.
這個(gè)錯(cuò)誤是在安卓端出現(xiàn)的，因?yàn)槭褂昧薒iteAVSDK類似這種使用了各種第三方庫(kù)包含android:label的量瓜，所以沖突了
解決辦法：其實(shí)錯(cuò)誤代碼提示也很是明確司恳，或者直接上谷歌去百度一下就可以得到答案，在mainfest Application標(biāo)簽中添加tools:relpace=”label”即可绍傲。
2扔傅、在使用EventChannel進(jìn)行Flutter和Native通信過(guò)程中出現(xiàn)以下錯(cuò)誤：
E/EventChannel#flutter_plugin_demo.event.status(15177): Failed to open event streamE/EventChannel#flutter_plugin_demo.event.status(15177): java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter oE/EventChannel#flutter_plugin_demo.event.status(15177): at com.chinahrt.flutter_plugin_demo2.FlutterPluginDemo2Plugin$onMethodCall$1.onListen(Unknown Source:2)E/EventChannel#flutter_plugin_demo.event.status(15177): at io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler.onListen(EventChannel.java:181)E/EventChannel#flutter_plugin_demo.event.status(15177): at io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler.onMessage(EventChannel.java:160)E/EventChannel#flutter_plugin_demo.event.status(15177): at io.flutter.view.FlutterNativeView$PlatformMessageHandlerImpl.handleMessageFromDart(FlutterNativeView.java:188)E/EventChannel#flutter_plugin_demo.event.status(15177): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:202)E/EventChannel#flutter_plugin_demo.event.status(15177): at android.os.MessageQueue.nativePollOnce(Native Method)E/EventChannel#flutter_plugin_demo.event.status(15177): at android.os.MessageQueue.next(MessageQueue.java:326)E/EventChannel#flutter_plugin_demo.event.status(15177): at android.os.Looper.loop(Looper.java:160)E/EventChannel#flutter_plugin_demo.event.status(15177): at android.app.ActivityThread.main(ActivityThread.java:6718)E/EventChannel#flutter_plugin_demo.event.status(15177): at java.lang.reflect.Method.invoke(Native Method)E/EventChannel#flutter_plugin_demo.event.status(15177): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)E/EventChannel#flutter_plugin_demo.event.status(15177): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)I/flutter (15177): ══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════I/flutter (15177): The following PlatformException was thrown while activating platform stream on channelI/flutter (15177): flutter_plugin_demo.event.status:I/flutter (15177): PlatformException(error, Parameter specified as non-null is null: methodI/flutter (15177): kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter o, null)I/flutter (15177):I/flutter (15177): When the exception was thrown, this was the stack:I/flutter (15177): #0 ?????StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:564:7)I/flutter (15177): #1 ?????MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:302:33)I/flutter (15177): <asynchronous suspension>I/flutter (15177): #2 ?????EventChannel.receiveBroadcastStream.<anonymous closure> (package:flutter/src/services/platform_channel.dart:490:29)I/flutter (15177): <asynchronous suspension>I/flutter (15177): #7 ?????VideoPlayerController.initialize (package:flutter_plugin_demo2/video_player.dart:33:10)I/flutter (15177): <asynchronous suspension>I/flutter (15177): #8 ?????_MyAppState.initState (package:flutter_plugin_demo2_example/main.dart:25:9)I/flutter (15177): #9 ?????StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3846:58)I/flutter (15177): #10 ????ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (15177): #11 ????Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)I/flutter (15177): #12 ????Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)I/flutter (15177): #13 ????RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:933:16)I/flutter (15177): #14 ????RenderObjectToWidgetElement.mount (package:flutter/src/widgets/binding.dart:904:5)I/flutter (15177): #15 ????RenderObjectToWidgetAdapter.attachToRenderTree.<anonymous closure> (package:flutter/src/widgets/binding.dart:850:17)I/flutter (15177): #16 ????BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2253:19)I/flutter (15177): #17 ????RenderObjectToWidgetAdapter.attachToRenderTree (package:flutter/src/widgets/binding.dart:849:13)I/flutter (15177): #18 ????_WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:736:7)I/flutter (15177): #19 ????runApp (package:flutter/src/widgets/binding.dart:780:7)I/flutter (15177): #20 ????main (package:flutter_plugin_demo2_example/main.dart:8:16)I/flutter (15177): #21 ????_runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:189:25)I/flutter (15177): #26 ????_runMainZoned.<anonymous closure> (dart:ui/hooks.dart:180:5)I/flutter (15177): #27 ????_startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:300:19)I/flutter (15177): #28 ????_RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)I/flutter (15177): (elided 8 frames from package dart:async)I/flutter (15177): ════════════════════════════════════════════════════════════════════════════════════════════════════
這個(gè)問(wèn)題還是出現(xiàn)在安卓平臺(tái)上，因?yàn)榘沧宽?xiàng)目使用了kotlin支持烫饼，在寫kotlin代碼實(shí)現(xiàn)EventChannel.StreamHandler時(shí)
override fun onListen(o: Any?, sink: EventChannel.EventSink?) {
}
override fun onCancel(o: Any?) {
}
參數(shù)應(yīng)該可空猎塞，因誤寫成不可空，導(dǎo)致報(bào)錯(cuò)枫弟。
所以解決辦法就是加?就可以
3邢享、在iOS項(xiàng)目podspec上配置騰訊云播放器TXLiteAVSDK_Player支持時(shí)，出現(xiàn)以下問(wèn)題
Undefined symbols for architecture x86_64:?????"vtable for __cxxabiv1::__si_class_type_info", referenced from:?????????typeinfo for bssl::(anonymous namespace)::ECKeyShare in TXLiteAVSDK_Player(ssl_key_share.o)?????????typeinfo for bssl::(anonymous namespace)::X25519KeyShare in TXLiteAVSDK_Player(ssl_key_share.o)?????NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.?????"_sqlite3_column_text", referenced from:?????????_qcloud_ijktsdb_meta_select in TXLiteAVSDK_Player(ijktsdb.o)?????"_sqlite3_bind_blob", referenced from:?????????_qcloud_ijktsdb_insert in TXLiteAVSDK_Player(ijktsdb.o)?????"_sqlite3_bind_text", referenced from:?????????_qcloud_ijktsdb_select in TXLiteAVSDK_Player(ijktsdb.o)?????????_ijktsdb_check in TXLiteAVSDK_Player(ijktsdb.o)?????????_qcloud_ijktsdb_insert in TXLiteAVSDK_Player(ijktsdb.o)?????????_qcloud_ijktsdb_meta_select in TXLiteAVSDK_Player(ijktsdb.o)?????????_qcloud_ijktsdb_meta_insert in TXLiteAVSDK_Player(ijktsdb.o)?????"_sqlite3_column_bytes", referenced from:?????????_qcloud_ijktsdb_select in TXLiteAVSDK_Player(ijktsdb.o)?????????_ijktsdb_check in TXLiteAVSDK_Player(ijktsdb.o)?????"_sqlite3_column_blob", referenced from:?????????_qcloud_ijktsdb_select in TXLiteAVSDK_Player(ijktsdb.o)?????"_sqlite3_errcode", referenced from:?????????_databaseError in TXLiteAVSDK_Player(ijktsdb.o)?????"_sqlite3_close", referenced from:?????????_qcloud_ijktsdb_open in TXLiteAVSDK_Player(ijktsdb.o)?????????_qcloud_ijktsdb_close in TXLiteAVSDK_Player(ijktsdb.o)
使用framwork配置無(wú)論怎樣都配置不成功淡诗，如果有大佬知道怎么配置的骇塘，可以教教我
最后還是使用了pod：s.dependency 'TXLiteAVSDK_Player' 配置成功了伊履。
參考資料：
https://guides.cocoapods.org/syntax/podspec.html#dependency
4、在開(kāi)發(fā)過(guò)程中出現(xiàn)以下錯(cuò)誤：
Exception: ideviceinfo returned an error:ERROR: Could not connect to lockdownd, error code -8#0 ?????IMobileDevice.getInfoForDevice (package:flutter_tools/src/ios/mac.dart:141:9)<asynchronous suspension>#1 ?????IOSDevice.getAttachedDevices (package:flutter_tools/src/ios/devices.dart:156:55)<asynchronous suspension>#2 ?????IOSDevices.pollingGetDevices (package:flutter_tools/src/ios/devices.dart:110:57)#3 ?????PollingDeviceDiscovery.devices (package:flutter_tools/src/device.dart:186:52)<asynchronous suspension>#4 ?????DeviceManager.getAllConnectedDevices (package:flutter_tools/src/device.dart:114:46)<asynchronous suspension>#5 ?????DeviceValidator.validate (package:flutter_tools/src/doctor.dart:705:54)<asynchronous suspension>#6 ?????Doctor.startValidatorTasks (package:flutter_tools/src/doctor.dart:129:52)#7 ?????Doctor.diagnose (package:flutter_tools/src/doctor.dart:200:41)#8 ?????_AsyncAwaitCompleter.start (dart:async-patch/async_patch.dart:49:6)#9 ?????Doctor.diagnose (package:flutter_tools/src/doctor.dart:190:24)#10 ????DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:48:39)#11 ????_AsyncAwaitCompleter.start (dart:async-patch/async_patch.dart:49:6)#12 ????DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:34:42)#13 ????FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:559:18)#14 ????_asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:77:64)#15 ????_rootRunUnary (dart:async/zone.dart:1132:38)#16 ????_CustomZone.runUnary (dart:async/zone.dart:1029:19)#17 ????_FutureListener.handleValue (dart:async/future_impl.dart:126:18)#18 ????Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)#19 ????Future._propagateToListeners (dart:async/future_impl.dart:668:32)#20 ????Future._complete (dart:async/future_impl.dart:473:7)#21 ????_SyncCompleter.complete (dart:async/future_impl.dart:51:12)#22 ????_AsyncAwaitCompleter.complete.<anonymous closure> (dart:async-patch/async_patch.dart:33:20)#23 ????_rootRun (dart:async/zone.dart:1124:13)#24 ????_CustomZone.run (dart:async/zone.dart:1021:19)#25 ????_CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)#26 ????_microtaskLoop (dart:async/schedule_microtask.dart:41:21)#27 ????_startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)#28 ????_runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:115:13)#29 ????_RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:5)
執(zhí)行命令： ideviceinfo -d 出現(xiàn)如下錯(cuò)誤
idevice.c:295 idevice_connect(): ERROR: Connecting to usbmuxd failed: -9 (Bad file descriptor)13:18:45 lockdown.c:663 lockdownd_client_new(): could not connect to lockdownd (device 1a95bb66796dad5ebf6a99d1c87101b5c2214963)13:18:45 lockdown.c:698 lockdownd_client_new_with_handshake(): failed to create lockdownd client.ERROR: Could not connect to lockdownd, error code -8
關(guān)于”Could not connect to lockdownd”這個(gè)錯(cuò)誤款违，網(wǎng)上出現(xiàn)了很多解決辦法唐瀑，但每個(gè)人碰到的error code -8，錯(cuò)誤碼都不一樣插爹。有部分解決辦法就是修改權(quán)限哄辣，對(duì)于錯(cuò)誤碼為 -8 的，一直沒(méi)有搜到相關(guān)解決辦法赠尾。折騰了一天力穗，其實(shí)原因是，開(kāi)發(fā)過(guò)程中气嫁，我碰到了手機(jī)当窗，導(dǎo)致手機(jī)數(shù)據(jù)線松了，然后我更換了一個(gè)USB接口寸宵，總之是因?yàn)槭謾C(jī)和電腦沒(méi)有連接好崖面。如果有碰到這個(gè)問(wèn)題，換個(gè)接口梯影，然后撤銷iphone手機(jī)和電腦的信任巫员，直到連接電腦時(shí)彈出信任授權(quán)對(duì)話框，才算是正常連接成功甲棍。一旦出現(xiàn)這個(gè)錯(cuò)誤简识，連安卓設(shè)備都運(yùn)行不了。
5感猛、運(yùn)行時(shí)出現(xiàn)
Assertion failed: (AMDeviceIsPaired(device)), function handle_device, file /tmp/ios-deploy-20181117-87168-1goz8ak/ios-deploy-1.9.4/src/ios-deploy/ios-deploy.m, line 1598.Could not install build/ios/iphoneos/Runner.app on 1a95bb66796dad5ebf6a99d1c87101b5c2214963.Try launching Xcode and selecting "Product > Run" to fix the problem:?open ios/Runner.xcworkspaceError launching application on iPhone (5).
出現(xiàn)這個(gè)錯(cuò)誤财异，直接按提示使用Xcode運(yùn)行一下項(xiàng)目即可。
6唱遭、還有最后一個(gè)嚴(yán)重的內(nèi)存泄漏的問(wèn)題
錯(cuò)誤日志：Signal 11 was raised.
在iOS實(shí)現(xiàn)將畫面數(shù)據(jù)傳送到Flutter，使用到了CVPixelBufferRef數(shù)據(jù)呈驶。對(duì)于這塊目前不是很清楚拷泽，大概是因?yàn)榫€程安全的問(wèn)題，在騰訊云播放器回調(diào)的數(shù)據(jù)袖瞻，隨時(shí)可能會(huì)被釋放司致，而在Flutter回調(diào)中使用了已被釋放的數(shù)據(jù)，出現(xiàn)了問(wèn)題聋迎。最后參考了ijk代碼脂矫，使用了OSAtomicCompareAndSwapPtrBarrier對(duì)數(shù)據(jù)進(jìn)行驗(yàn)證比較得以解決，對(duì)于這個(gè)OSAtomicCompareAndSwapPtrBarrier方法也不是很理解霉晕，如果有大佬了解的庭再，可以教教我捞奕。
如果有錯(cuò)誤的地方，希望大佬不吝賜教拄轻。
同時(shí)希望star一下颅围。項(xiàng)目github地址：https://github.com/RandyWei/flt_video_player
