我一直在尝试修改bigflake的DecodeEditEncode来编辑mp4文件，然后将其编码回mp4。我环顾互联网，无法找到解决方案。我正在设置IFRAME间隔和FPS，但Muxer仍然抱怨同步帧并且无法停止。
任何有经验的人都可以指出我做错了什么吗？ 非常感谢提前：）
private static void encodeToMp4(MediaCodec decoder,
OutputSurface outputSurface, InputSurface inputSurface, MediaCodec encoder) {
final int TIMEOUT_USEC = 10000;
ByteBuffer[] decoderInputBuffers = decoder.getInputBuffers();
ByteBuffer[] encoderOutputBuffers = encoder.getOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
MediaMuxer mediaMuxer = null;
int inputChunk = 0;
int outputCount = 0;
boolean outputDone = false;
boolean inputDone = false;
boolean decoderDone = false;
while (!outputDone) {
if (VERBOSE) Log.d(TAG, "edit loop");
// Feed more data to the decoder.
if (!inputDone) {
int inputBufIndex = decoder.dequeueInputBuffer(TIMEOUT_USEC);
if (inputBufIndex >= 0) {
ByteBuffer buffer = decoderInputBuffers[inputBufIndex];
int sampleSize = extractor.readSampleData(buffer, 0);
if (sampleSize < 0) {
inputChunk++;
// End of stream -- send empty frame with EOS flag set.
decoder.queueInputBuffer(inputBufIndex, 0, 0, 0L,
MediaCodec.BUFFER_FLAG_END_OF_STREAM);
inputDone = true;
} else {
// Copy a chunk of input to the decoder. The first chunk should have
// the BUFFER_FLAG_CODEC_CONFIG flag set.
buffer.clear();
decoder.queueInputBuffer(inputBufIndex, 0, sampleSize, extractor.getSampleTime(), 0);
extractor.advance();
inputChunk++;
}
}
}
// Assume output is available. Loop until both assumptions are false.
boolean decoderOutputAvailable = !decoderDone;
boolean encoderOutputAvailable = true;
try {
mediaMuxer = new MediaMuxer(outputFile.getAbsolutePath(), MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
} catch (IOException e) {
e.printStackTrace();
}
MediaFormat mediaFormat = extractor.getTrackFormat(0);
mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 20);
mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 10);
int trackIndex = mediaMuxer.addTrack(mediaFormat);
mediaMuxer.start();
while (decoderOutputAvailable || encoderOutputAvailable) {
int encoderStatus = encoder.dequeueOutputBuffer(info, TIMEOUT_USEC);
if (encoderStatus == (int) MediaCodec.INFO_TRY_AGAIN_LATER) {
// no output available yet
encoderOutputAvailable = false;
} else if (encoderStatus == (int) MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
encoderOutputBuffers = encoder.getOutputBuffers();
} else if (encoderStatus == (int) MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
MediaFormat newFormat = encoder.getOutputFormat();
} else { // encoderStatus >= 0
ByteBuffer encodedData = encoderOutputBuffers[encoderStatus];
if (encodedData == null) {
Log.e(TAG, "encoderOutputBuffer " + encoderStatus + " was null");
}
// Write the data to the output "file".
if (info.size != 0) {
encodedData.position(info.offset);
encodedData.limit(info.offset + info.size);
byte[] data = new byte[encodedData.remaining()];
encodedData.get(data);
mediaMuxer.writeSampleData(trackIndex, encodedData, info);
// outputData.addChunk(encodedData, (int)info.Flags, info.PresentationTimeUs);
outputCount++;
if (VERBOSE) Log.d(TAG, "encoder output " + info.size + " bytes");
}
outputDone = (info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0;
encoder.releaseOutputBuffer(encoderStatus, false);
}
if (encoderStatus != (int) MediaCodec.INFO_TRY_AGAIN_LATER) {
// Continue attempts to drain output.
continue;
}
// Encoder is drained, check to see if we've got a new frame of output from
// the decoder. (The output is going to a Surface, rather than a ByteBuffer,
// but we still get information through BufferInfo.)
if (!decoderDone) {
int decoderStatus = decoder.dequeueOutputBuffer(info, TIMEOUT_USEC);
if (decoderStatus == (int) MediaCodec.INFO_TRY_AGAIN_LATER) {
// no output available yet
if (VERBOSE) Log.d(TAG, "no output from decoder available");
decoderOutputAvailable = false;
} else if (decoderStatus == (int) MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
//decoderOutputBuffers = decoder.GetOutputBuffers();
if (VERBOSE) Log.d(TAG, "decoder output buffers changed (we don't care)");
} else if (decoderStatus == (int) MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
// expected before first buffer of data
MediaFormat newFormat = decoder.getOutputFormat();
if (VERBOSE) Log.d(TAG, "decoder output format changed: " + newFormat);
} else if (decoderStatus < 0) {
Log.e(TAG, "unexpected result from decoder.dequeueOutputBuffer: " + decoderStatus);
} else { // decoderStatus >= 0
if (VERBOSE) Log.d(TAG, "surface decoder given buffer "
+ decoderStatus + " (size=" + info.size + ")");
// The ByteBuffers are null references, but we still get a nonzero
// size for the decoded data.
boolean doRender = (info.size != 0);
// As soon as we call releaseOutputBuffer, the buffer will be forwarded
// to SurfaceTexture to convert to a texture. The API doesn't
// guarantee that the texture will be available before the call
// returns, so we need to wait for the onFrameAvailable callback to
// fire. If we don't wait, we risk rendering from the previous frame.
decoder.releaseOutputBuffer(decoderStatus, doRender);
if (doRender) {
// This waits for the image and renders it after it arrives.
if (VERBOSE) Log.d(TAG, "awaiting frame");
outputSurface.awaitNewImage();
outputSurface.drawImage();
// Send it to the encoder.
inputSurface.setPresentationTime(info.presentationTimeUs * 1000);
if (VERBOSE) Log.d(TAG, "swapBuffers");
inputSurface.swapBuffers();
}
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
// forward decoder EOS to encoder
if (VERBOSE) Log.d(TAG, "signaling input EOS");
if (WORK_AROUND_BUGS) {
// Bail early, possibly dropping a frame.
return;
} else {
encoder.signalEndOfInputStream();
}
}
}
}
}
}
if (inputChunk != outputCount) {
throw new RuntimeException("frame lost: " + inputChunk + " in, " +
outputCount + " out");
}
mediaMuxer.stop();
mediaMuxer.release();
listener.onFinished();
}
答案 0 :(得分：0)
使用以下bigflake测试ExtractDecodeEditEncodeMuxTest.java修复了所有问题。对于每个尝试实现类似功能的人来说，这个样本都是节省生命的。 ：）