android - react-native-video 需要很长时间才能开始播放

Question

在将我的应用程序升级到 react-native 0.59 时，我还升级了 react-native-video到它的最新版本 4.4.1。当前发生的情况是，当尝试使用此库播放视频时，视频需要一段时间才能播放。视频的大小似乎并不重要。视频存储在 S3 上，在我的测试环境中，视频通过 Cloudfront 链接，在我的本地环境中，视频是由 S3 位置链接的，但是两种环境所表现出的行为是相同的。

这仅适用于 Android，iOS 播放可用性可在 1 秒内为相同的视频做好准备。

我试过回滚 react-native-video到以前的兼容版本，问题仍然存在。

不同的设备有不同的播放可用性等待时间。

由于使用需要 SDK 28 的 Firebase 版本，我无法使用 SDK 27。

有一个IOException在初始化组件以获取 S3 资源时引发，但库最终会获取视频。

我不知道问题的确切原因，库是否在播放前下载了视频，或者请求中是否需要包含 header 。

这是尝试播放视频时的调试输出:

I/MediaPlayer: constructor
W/MediaPlayer: setScreenOnWhilePlaying(true) is ineffective without a SurfaceHolder
V/MediaPlayer: resetDrmState:  mDrmInfo=null mDrmProvisioningThread=null mPrepareDrmInProgress=false mActiveDrmScheme=false
    cleanDrmObj: mDrmObj=null mDrmSessionId=null
V/MediaPlayer: resetDrmState:  mDrmInfo=null mDrmProvisioningThread=null mPrepareDrmInProgress=false mActiveDrmScheme=false
    cleanDrmObj: mDrmObj=null mDrmSessionId=null
I/MediaPlayer: setDataSource:<S3-url>/video.mp4
W/MediaPlayer: Couldn't open <S3-url>/video.mp4: java.io.FileNotFoundException: No content provider: <S3-url>/video.mp4
I/MediaPlayer: setDataSource:<S3-url>/video.mp4
V/MediaHTTPService: MediaHTTPService(android.media.MediaHTTPService@cefd526): Cookies: null
V/MediaHTTPService: makeHTTPConnection: CookieManager created: java.net.CookieManager@6738567
    makeHTTPConnection(android.media.MediaHTTPService@cefd526): cookieHandler: java.net.CookieManager@6738567 Cookies: null
I/DpmTcmClient: RegisterTcmMonitor from: com.android.okhttp.TcmIdleTimerMonitor
V/MediaPlayer: resetDrmState:  mDrmInfo=null mDrmProvisioningThread=null mPrepareDrmInProgress=false mActiveDrmScheme=false
    cleanDrmObj: mDrmObj=null mDrmSessionId=null
V/MediaPlayer: resetDrmState:  mDrmInfo=null mDrmProvisioningThread=null mPrepareDrmInProgress=false mActiveDrmScheme=false
    cleanDrmObj: mDrmObj=null mDrmSessionId=null
I/MediaPlayer: setDataSource:<S3-url>/video.mp4
W/MediaPlayer: Couldn't open <S3-url>/video.mp4: java.io.FileNotFoundException: No content provider: <S3-url>/video.mp4
I/MediaPlayer: setDataSource:<S3-url>/video.mp4
V/MediaHTTPService: MediaHTTPService(android.media.MediaHTTPService@f3e96c4): Cookies: null
V/MediaHTTPService: makeHTTPConnection: CookieHandler (java.net.CookieManager@6738567) exists.
    makeHTTPConnection(android.media.MediaHTTPService@f3e96c4): cookieHandler: java.net.CookieManager@6738567 Cookies: null
W/MediaPlayer: setScreenOnWhilePlaying(true) is ineffective for Surface
W/System: A resource failed to call release. 
I/MediaPlayer: start
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
E/Config:Grabber:GameModeImComponents: Exception:Value 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 of type java.lang.String cannot be converted to JSONArray
E/Config:Grabber:GameModeImComponents: Exception:Value 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 of type java.lang.String cannot be converted to JSONArray
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
W/MediaPlayerNative: info/warning (3, 0)
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
W/OpenGLRenderer: Unsupported Gamut: 147062784
W/MapperHal: buffer descriptor with invalid usage bits 0x2000
W/MediaPlayerNative: info/warning (703, 62540)
W/MediaPlayerNative: info/warning (701, 0)
W/MediaPlayerNative: info/warning (703, 69051)
W/MediaPlayerNative: info/warning (702, 0)
W/MediaPlayerNative: info/warning (3, 0)
W/MediaPlayerNative: info/warning (703, 10821)
W/MediaPlayerNative: info/warning (701, 0)
W/MediaPlayerNative: info/warning (703, 13947)
W/MediaPlayerNative: info/warning (702, 0)
W/MediaPlayerNative: info/warning (3, 0)
I/MediaPlayer: seek to:0 mode:0
W/MediaPlayerNative: info/warning (703, 67808)
    info/warning (701, 0)
W/MediaPlayerNative: info/warning (703, 9582)
    info/warning (702, 0)

React-Native: 0.59
Target SDK: 28
Android OS: Pie
Testing Device: OnePlus 5
Other devices with older OS version (at least Marshmellow) are also affected

Answer 1

通过启用 react-native-video 在 Android 上使用 ExoPlayer 将加载时间从之前的 20 秒左右减少到只有几秒。所以现在在 iOS 和 Android 上的播放时间差不多。播放的文件是通过 Google Cloud 存储的 8.8mb .MOV 文件。
在整个项目的根目录中添加一个 react-native.config.js 文件，其中包含以下几行:

module.exports = {
    dependencies: {
        "react-native-video": {
            platforms: {
                android: {
                    sourceDir: "../node_modules/react-native-video/android-exoplayer",
                },
            },
        },
    },
}

已使用: "react-native-video": "^5.2.0" ,
Release模式，在设备上。