Android MediaMuxer 无法停止

Question

我正在尝试使用 MediaCodec、MediaExtractor 和 MediaMuxer 生成 mp4 文件。 EveryThing 似乎工作正常，但当我调用 MediaMuxer.stop 时出现错误。 MP4 文件已创建，但无法使用播放器播放。

这是我的日志:

02-13 10:41:22.420: D/OpenGLRenderer(11768): Enabling debug mode 0
02-13 10:41:22.600: I/OMXClient(11768): Using client-side OMX mux.
02-13 10:41:22.717: E/ACodec(11768): [OMX.TI.DUCATI1.VIDEO.DECODER] storeMetaDataInBuffers failed w/ err -2147483648
02-13 10:41:22.717: I/ACodec(11768): DRC Mode: Port Reconfig Mode
02-13 10:41:22.725: I/MPEG4Writer(11768): limits: 2147483647/0 bytes/us, bit rate: -1 bps and the estimated moov size 3072 bytes
02-13 10:41:22.803: I/MPEG4Writer(11768): setStartTimestampUs: 0
02-13 10:41:22.803: I/MPEG4Writer(11768): Earliest track starting time: 0
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768): Warning message AMessage(what = 'omx ', target = 1) = {
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768):   int32_t type = 0
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768):   void *node = 0x4d
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768):   int32_t event = 3
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768):   int32_t data1 = 1
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768):   int32_t data2 = 117440527
02-13 10:41:22.896: W/AHierarchicalStateMachine(11768): } unhandled in root state.
02-13 10:41:22.912: I/MPEG4Writer(11768): setStartTimestampUs: 0
02-13 10:41:22.912: D/DecodeActivity(11768): INFO_OUTPUT_BUFFERS_CHANGED
02-13 10:41:22.935: D/DecodeActivity(11768): New format {height=832, what=1869968451, color-format=256, slice-height=832, crop-left=32, width=1408, crop-bottom=743, crop-top=24, mime=video/raw, stride=4096, crop-right=1311}
02-13 10:41:22.959: W/MPEG4Writer(11768): 0-duration samples found: 1
02-13 10:41:22.975: W/MPEG4Writer(11768): 0-duration samples found: 1
02-13 10:41:22.990: I/ActivityManager(11768): Timeline: Activity_idle id: android.os.BinderProxy@41ab6858 time:26420441
02-13 10:41:33.701: D/DecodeActivity(11768): InputBuffer BUFFER_FLAG_END_OF_STREAM
02-13 10:41:33.709: D/DecodeActivity(11768): OutputBuffer BUFFER_FLAG_END_OF_STREAM
02-13 10:41:33.709: E/MPEG4Writer(11768): There are no sync frames for video track
02-13 10:41:33.717: W/MPEG4Writer(11768): 0-duration samples found: 283
02-13 10:41:33.717: I/MPEG4Writer(11768): Received total/0-length (284/0) buffers and encoded 284 frames. - video
02-13 10:41:33.717: D/MPEG4Writer(11768): Stopping Video track
02-13 10:41:33.717: D/MPEG4Writer(11768): Stopping Video track source
02-13 10:41:33.717: D/MPEG4Writer(11768): Video track stopped
02-13 10:41:33.717: D/MPEG4Writer(11768): Stopping Audio track
02-13 10:41:36.076: W/MPEG4Writer(11768): 0-duration samples found: 453
02-13 10:41:36.076: I/MPEG4Writer(11768): Received total/0-length (454/0) buffers and encoded 454 frames. - audio
02-13 10:41:36.271: I/MPEG4Writer(11768): Audio track drift time: 0 us
02-13 10:41:36.271: D/MPEG4Writer(11768): Stopping Audio track source
02-13 10:41:36.271: D/MPEG4Writer(11768): Audio track stopped
02-13 10:41:36.271: D/MPEG4Writer(11768): Duration from tracks range is [0, 0] us
02-13 10:41:36.271: D/MPEG4Writer(11768): Stopping writer thread
02-13 10:41:36.271: D/MPEG4Writer(11768): 0 chunks are written in the last batch
02-13 10:41:36.271: D/MPEG4Writer(11768): Writer thread stopped
02-13 12:28:47.507: E/MediaMuxer(14233): stop() is called in invalid state 3
02-13 10:41:36.271: W/dalvikvm(11768): threadid=11: thread exiting with uncaught exception (group=0x417fbc80)
02-13 10:41:36.271: E/AndroidRuntime(11768): FATAL EXCEPTION: Thread-2394
02-13 10:41:36.271: E/AndroidRuntime(11768): Process: com.test.applyexporter, PID: 11768
02-13 10:41:36.271: E/AndroidRuntime(11768): java.lang.IllegalStateException: Failed to stop the muxer
02-13 10:41:36.271: E/AndroidRuntime(11768):    at android.media.MediaMuxer.nativeStop(Native Method)
02-13 10:41:36.271: E/AndroidRuntime(11768):    at android.media.MediaMuxer.stop(MediaMuxer.java:226)
02-13 10:41:36.271: E/AndroidRuntime(11768):    at com.test.applyexporter.MainActivity$DecoderThread.releaseDecoder(MainActivity.java:266)
02-13 10:41:36.271: E/AndroidRuntime(11768):    at com.test.applyexporter.MainActivity$DecoderThread.run(MainActivity.java:113)
02-13 10:41:36.310: I/Process(11768): Sending signal. PID: 11768 SIG: 9

停止失败的任何线索？

Answer 1

注意错误:

E/MPEG4Writer(11768): There are no sync frames for video track

混合视频输出必须以同步帧(a/k/a 关键帧、a/k/a I 帧)开始。如果您从一个预测帧开始，但没有任何可预测的内容，解码器将不知道该怎么做。

确保您通过了所有 MediaCodec.BufferInfo通过 MediaMuxer 传递值——这就是标志所在的位置。同步帧将设置 BUFFER_FLAG_SYNC_FRAME 标志。

(更新:自 API 21 起，BUFFER_FLAG_SYNC_FRAME 已弃用，取而代之的是 BUFFER_FLAG_KEY_FRAME。两个符号具有相同的整数值和相同的含义；更改只是努力在 API 中采用一致的术语。)