我正在努力掌握今年ExoPlayer library引入的新Google I/O 2014，以便我可以将其纳入我的申请中。
我正在尝试通过HTTP传输mp3，但到目前为止还没有成功。我不确定它是否可行，但我试图在不扩展任何基础Source / Sample类的情况下完成此任务。我的代码如下：
在我的活动中
SampleSource s = new FrameworkSampleSource(this, Uri.parse("http://traffic.libsyn.com/joeroganexp/p518.mp3"), null, 1);
// Since I only have 1 audio renderer
ExoPlayer player = ExoPlayer.Factory.newInstance(1);
MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(s);
player.prepare(audioRenderer);
player.setPlayWhenReady(true);
logcat的
3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ SniffFFMPEG
07-06 15:52:34.080 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ android-source:0xb7c53e00
07-06 15:52:34.084 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source begin open
07-06 15:52:34.084 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android open, url: android-source:0xb7c53e00
07-06 15:52:34.084 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ ffmpeg open android data source success, source ptr: 0xb7c53e00
07-06 15:52:34.088 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source open success
07-06 15:52:34.108 3363-3363/com.kevintcoughlin.smodr W/EGL_genymotion﹕ eglSurfaceAttrib not implemented
07-06 15:52:34.116 3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from GradienCache
07-06 15:52:34.120 3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
07-06 15:52:34.128 3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from Caches::initConstraints()
07-06 15:52:34.128 3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
07-06 15:52:34.128 3363-3363/com.kevintcoughlin.smodr D/OpenGLRenderer﹕ Enabling debug mode 0
07-06 15:52:34.640 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ [mp3 @ 0xb7c57040] Estimating duration from bitrate, this may be inaccurate
07-06 15:52:34.640 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Input #0, mp3, from 'android-source:0xb7c53e00':
07-06 15:52:34.640 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Metadata:
07-06 15:52:34.640 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ TSS : Logic Pro 9.1.8
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ title : #518 - Matt Fulchiron
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ artist : Joe Rogan Experience
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ album_artist : Joe Rogan Experience
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Duration: 02:57:10.21, start: 0.000000, bitrate: 127 kb/s
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ FFmpegExtrator, url: android-source:0xb7c53e00, format_name: mp3, format_long_name: MP2/3 (MPEG audio layer 2/3)
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ list the formats suppoted by ffmpeg:
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[00]: mpeg
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[01]: mpegts
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[02]: mov,mp4,m4a,3gp,3g2,mj2
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[03]: matroska,webm
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[04]: asf
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[05]: rm
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[06]: flv
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[07]: swf
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[08]: avi
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[09]: ape
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[10]: dts
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[11]: flac
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[12]: ac3
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[13]: wav
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[14]: ogg
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[15]: vc1
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[16]: hevc
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source close
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr W/FFmpegExtractor﹕ sniff through BetterSniffFFMPEG failed, try LegacySniffFFMPEG
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ source url:http://traffic.libsyn.com/joeroganexp/p518.mp3
07-06 15:52:34.644 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source begin open
07-06 15:52:34.648 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android open, url: android-source:0xb7c53e00|file:http://traffic.libsyn.com/joeroganexp/p518.mp3
07-06 15:52:34.648 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ ffmpeg open android data source success, source ptr: 0xb7c53e00
07-06 15:52:34.648 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source open success
07-06 15:52:34.708 3363-3394/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed 361K, 4% free 10852K/11288K, paused 75ms, total 75ms
07-06 15:52:34.844 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ [mp3 @ 0xb7ca7700] Estimating duration from bitrate, this may be inaccurate
07-06 15:52:34.844 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Input #0, mp3, from 'android-source:0xb7c53e00|file:http://traffic.libsyn.com/joeroganexp/p518.mp3':
07-06 15:52:34.844 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Metadata:
07-06 15:52:34.844 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ TSS : Logic Pro 9.1.8
07-06 15:52:34.848 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ title : #518 - Matt Fulchiron
07-06 15:52:34.848 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ artist : Joe Rogan Experience
07-06 15:52:34.848 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ album_artist : Joe Rogan Experience
07-06 15:52:34.848 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Duration: 02:57:10.21, start: 0.000000, bitrate: 127 kb/s
07-06 15:52:34.848 3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
07-06 15:52:34.848 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ FFmpegExtrator, url: android-source:0xb7c53e00|file:http://traffic.libsyn.com/joeroganexp/p518.mp3, format_name: mp3, format_long_name: MP2/3 (MPEG audio layer 2/3)
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ list the formats suppoted by ffmpeg:
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[00]: mpeg
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[01]: mpegts
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[02]: mov,mp4,m4a,3gp,3g2,mj2
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[03]: matroska,webm
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[04]: asf
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[05]: rm
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[06]: flv
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[07]: swf
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[08]: avi
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[09]: ape
07-06 15:52:34.852 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[10]: dts
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[11]: flac
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[12]: ac3
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[13]: wav
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[14]: ogg
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[15]: vc1
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[16]: hevc
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source close
07-06 15:52:34.856 3363-3376/com.kevintcoughlin.smodr D/FFmpegExtractor﹕ SniffFFMPEG failed to sniff this source
07-06 15:52:34.856 3363-3397/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed 120K, 3% free 12342K/12696K, paused 29ms, total 60ms
07-06 15:52:34.860 3363-3397/com.kevintcoughlin.smodr I/dalvikvm-heap﹕ Grow heap (frag case) to 13.981MB for 1960012-byte allocation
07-06 15:52:34.872 3363-3387/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed <1K, 3% free 14256K/14612K, paused 10ms, total 10ms
07-06 15:52:34.880 3363-3376/com.kevintcoughlin.smodr I/OMXClient﹕ Using client-side OMX mux.
07-06 15:52:34.976 3363-3400/com.kevintcoughlin.smodr I/OMXClient﹕ Using client-side OMX mux.
07-06 15:52:35.144 3363-3393/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed 1512K, 12% free 13705K/15532K, paused 12ms, total 36ms
07-06 15:52:35.152 3363-3393/com.kevintcoughlin.smodr I/dalvikvm-heap﹕ Grow heap (frag case) to 15.315MB for 1962812-byte allocation
07-06 15:52:35.200 3363-3388/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed <1K, 11% free 15621K/17452K, paused 39ms, total 39ms
07-06 15:52:35.356 3363-3400/com.kevintcoughlin.smodr E/ACodec﹕ OMX/mediaserver died, signalling error!
07-06 15:52:35.356 3363-3400/com.kevintcoughlin.smodr E/MediaCodec﹕ Codec reported an error. (omx error 0x8000100d, internalError -32)
07-06 15:52:35.376 3363-3400/com.kevintcoughlin.smodr A/ACodec﹕ frameworks/av/media/libstagefright/ACodec.cpp:499 CHECK(mem.get() != NULL) failed.
07-06 15:52:35.376 3363-3400/com.kevintcoughlin.smodr A/libc﹕ Fatal signal 4 (SIGILL) at 0xb76d563d (code=2), thread 3400 (MediaCodec_loop)
对于我未经训练的眼睛，似乎我可以正确获取TrackInfo，但是在通过HTTP读取数据时遇到问题。似乎框架嗅探mimetype是如何失败的，即使我确实收到类型'audio / mpeg'。
再次，我感谢我收到的任何指示。我意识到这些API非常新。
谢谢！
答案 0 :(得分：6)
以下代码对我有用。我很难将exoPlayer连接到UI。
String key = DeveloperKey.CLIENT_ID;
// Construct the URL for the query
final String BASE_URL = "https://api.soundcloud.com/tracks/101150664/stream?";
final String CLIENTID_PARAM = "client_id";
Uri builtUri = Uri.parse(BASE_URL).buildUpon()
.appendQueryParameter(CLIENTID_PARAM, key)
.build();
Log.v(LOG_TAG, "BUILT URI FOR STREAMING: " + builtUri);
// Build the sample source
FrameworkSampleSource sampleSource = new FrameworkSampleSource(getActivity(), builtUri, null, 1);
// Build the track renderers
TrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource, null, true);
// Build the ExoPlayer and start playback
ExoPlayer exoPlayer = ExoPlayer.Factory.newInstance(1);
exoPlayer.prepare(audioRenderer);
exoPlayer.setPlayWhenReady(true);