Android HLS-流式传输无法获取细分 [英] Android HLS- Streaming failed to fetch segment

问题描述

我为Android编写了一个Videoplayer，用于通过HLS流式传输视频.在我的服务器上，我有m3u8-Playlist和.ts-Segments. 我的代码如下:

I write a Videoplayer for Android to stream Video over HLS. On my Server I have the m3u8-Playlist and the .ts-Segments. My Code look like this:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    vidSurface = (SurfaceView) findViewById(R.id.surfView);
    vidHolder = vidSurface.getHolder();
    vidHolder.addCallback(this);
}


public void surfaceCreated(SurfaceHolder arg0) {
    try {
        mediaPlayer = new MediaPlayer();
        mediaPlayer.setDisplay(vidHolder);
        mediaPlayer.setDataSource(vidAddress);
        mediaPlayer.prepareAsync();
        mediaPlayer.setOnPreparedListener(this);
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    }
    catch(Exception e){
        e.printStackTrace();
    }
}    

对于Apple bipbopall.m3u8示例，播放器工作正常.但是当我尝试播放我的播放列表时，会发生此错误:

The Player works fine for the Apple bipbopall.m3u8 example. But when I try to play my Playlist this error occurs:

E/PlaylistFetcher﹕ failed to fetch .ts segment at url 'http://example.com/USSM.mp4Frag1Num0.ts'
E/LiveSession﹕ XXX Received error -1008 from PlaylistFetcher.
E/MediaPlayer﹕ error (1, -1008)

我认为文件的AES-128解密存在问题. MediaPlayer是否可以自己解密文件，如何检查解密是否成功? (我使用最新的Android版本)

I think there is a problem with the AES-128 decryption of the files. Does the MediaPlayer decrypt the files by him self and how can I check if the decryption was successful? (I use the latest Android-Version)

推荐答案

在评论中继续讨论:

1008为ERROR_OUT_OF_RANGE.通过下载片段，解密片段并尝试播放片段来检查服务器是否正确响应(请参见下面的方法).

1008 is ERROR_OUT_OF_RANGE returned when trying to read the segment into a buffer. Check if the server is properly responding by downloading a segment, decrypting it and attempting to play it back (see method below).

要检查的其他事项:确保MPEG-TS段有效.如果您使用MP4文件中包含的H.264流创建段，请检查它们是否使用Annex B格式(例如，在ffmpeg中，您可以使用h264_mp4toannexb位流过滤器)编码流-您可以将其与-c:v copy)

Other things to check: make sure the MPEG-TS segments are valid. If you used the H.264 stream contained in an MP4 file to create the segments check if they're using the Annex B format (for eg. in ffmpeg you can use the h264_mp4toannexb bitstream filter which works on the encoded stream - you can use it with -c:v copy)

要检查加密是否正确，请使用openssl.

To check if the encryption is correct use openssl.

1. 以普通十六进制格式获取密钥

1. Get the key in plain hex

xxd -p keyfile.key

解密.ts段

openssl aes-128-cbc -d -in encrypted_segment.ts -out decrypted_segment.ts -nosalt -iv <iv_hex> -K <key_hex>

如果没有定义的IV，则它等于媒体序列.

If there's no defined IV then it is equal to the media sequence.

尝试播放解密的片段.

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