Android MediaCodec dekoduje surową ramkę h264
Używam Android MediaCodec API do dekodowania ramek h264. Mogłem dekodować i renderować klatki w widoku. Mój problem polega na tym, że dekoder nie ma wielu ramek, zwłaszcza pierwszych kilku klatek.DecodeMediaCodec.dequeueOutputBuffer () powrót -1. Około 150 klatek h264, tylko dekodowane 43 klatki. Nie mogę znaleźć problemu. Oto moje kody.
/**
* init decoder
*/
private void initDecodeMediaCodec()
{
mDecodeMediaCodec = MediaCodec.createDecoderByType(MIME_TYPE);
MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE,
VIDEO_WIDTH_640,
VIDEO_HEIGHT_480);
mDecodeMediaCodec.configure(format,
new Surface(mRemoteVideoView.getSurfaceTexture()),
null,
0);
mDecodeMediaCodec.start();
mDecodeInputBuffers = mDecodeMediaCodec.getInputBuffers();
System.out.println("decode-----"
+ mDecodeMediaCodec.getCodecInfo().getName());
}
Po uruchomieniu dekodera uruchomię wątek dekodera.
/**
*
* @param frameData
*/
private void decode()
{
new Thread(new Runnable()
{
@Override
public void run()
{
while (true)
{
ByteBuffer decodeDataBuffer = null;
try
{
//take h264 frame from cache queue
decodeDataBuffer = decodeDataQuene.take();
}
catch (InterruptedException e)
{
e.printStackTrace();
}
BufferInfo info = new BufferInfo();
int inputBufferIndex = mDecodeMediaCodec.dequeueInputBuffer(-1);
System.out.println("inputBufferIndex: " + inputBufferIndex);
if (inputBufferIndex >= 0)
{
ByteBuffer buffer = mDecodeInputBuffers[inputBufferIndex];
buffer.clear();
buffer.put(decodeDataBuffer.array());
mDecodeMediaCodec.queueInputBuffer(inputBufferIndex,
0,
decodeDataBuffer.array().length,
0,
0);
decodeDataBuffer.clear();
decodeDataBuffer = null;
}
int outputBufferIndex = mDecodeMediaCodec.dequeueOutputBuffer(info,
1000);
System.out.println("outputBufferIndex: "
+ outputBufferIndex);
do
{
if (outputBufferIndex == MediaCodec.INFO_TRY_AGAIN_LATER)
{
//no output available yet
}
else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED)
{
//encodeOutputBuffers = mDecodeMediaCodec.getOutputBuffers();
}
else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED)
{
MediaFormat formats = mDecodeMediaCodec.getOutputFormat();
//mediaformat changed
}
else if (outputBufferIndex < 0)
{
//unexpected result from encoder.dequeueOutputBuffer
}
else
{
mDecodeMediaCodec.releaseOutputBuffer(outputBufferIndex,
true);
outputBufferIndex = mDecodeMediaCodec.dequeueOutputBuffer(info,
0);
System.out.println("inner outputBufferIndex: "
+ outputBufferIndex);
}
} while (outputBufferIndex > 0);
}
}
}).start();
}
Ktoś wie dlaczego? Mam nadzieję, że twoja pomoc. Moje urządzenie z Androidem to nexus 7.