E / ExoPlayerImplInternal：从本地存储播放.MP4文件时发生源错误

问题描述

我正在从URL下载MP4文件并将其存储在本地，然后当我使用exoplayer播放视频时，它可以正常工作。但是当我使用seekbar来回移动时，它会抛出异常（尽管确实适用于某些视频）

2020-08-19 08:49:20.464 19968-20115/com.pearson.ppe E/ExoPlayerImplInternal: Source error
      com.google.android.exoplayer2.ParserException: Invalid NAL length
        at com.google.android.exoplayer2.extractor.mp4.Mp4Extractor.readSample(Mp4Extractor.java:542)
        at com.google.android.exoplayer2.extractor.mp4.Mp4Extractor.read(Mp4Extractor.java:192)
        at com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:982)
        at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:391)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
        at java.lang.Thread.run(Thread.java:764)

它适用于某些视频，而不适用于某些其他视频（已选中可在PC上播放下载的视频，它始终有效）。

这是代码段

        val controls: PlayerControlView = findViewById(R.id.controls)
        controls.player = player
        // Produces DataSource instances through which media data is loaded.
        dataSourceFactory= DefaultDataSourceFactory(this,Util.getUserAgent(this,getString(R.string.app_name)))

        val path = intent.getStringExtra("path")
        // MediaSource representing the media to be played.
        val uri = Uri.parse(path)
        val videoSource: MediaSource = ProgressiveMediaSource.Factory(dataSourceFactory).createMediaSource(uri)

        player.prepare(videoSource)
        player.playWhenReady = true 

Exo-Player版本：

implementation 'com.google.android.exoplayer:exoplayer:2.11.4'

解决方法

此问题已在exoplayer git存储库中报告，您也可以从以下位置进行检查

https://github.com/google/ExoPlayer/issues/6554