我正在創建由MediaCodec輸出的原始H.264流。問題是輸出文件在Android默認播放器(API 16)中無法播放。 Android如何導出無法在播放器中播放的文件,只能在PC上的VLC中導出。也許我的代碼有一些錯誤?我的視頻是384x288。由MediaCodec輸出的原始H.264流不可播放
public class AvcEncoder {
private MediaCodec mediaCodec;
private BufferedOutputStream outputStream;
private File f;
public AvcEncoder(int w, int h, String file_name)
{
f = new File(file_name + ".mp4");
try {
outputStream = new BufferedOutputStream(new FileOutputStream(f));
} catch (Exception e){
e.printStackTrace();
}
String key_mime = "video/avc"; //video/mp4v-es, video/3gpp, video/avc
mediaCodec = MediaCodec.createEncoderByType(key_mime);
MediaFormat mediaFormat = MediaFormat.createVideoFormat(key_mime, w, h);
mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, (w * h) << 3);
mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 25);
mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar);
mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
mediaFormat.setInteger(MediaFormat.KEY_AAC_PROFILE,MediaCodecInfo.CodecProfileLevel.MPEG4ProfileMain);
mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mediaCodec.start();
}
public void close() {
try {
mediaCodec.stop();
mediaCodec.release();
outputStream.flush();
outputStream.close();
} catch (Exception e){
e.printStackTrace();
}
}
public void offerEncoder(byte[] input) {
try {
ByteBuffer[] inputBuffers = mediaCodec.getInputBuffers();
ByteBuffer[] outputBuffers = mediaCodec.getOutputBuffers();
int inputBufferIndex = mediaCodec.dequeueInputBuffer(0);
if (inputBufferIndex >= 0) {
ByteBuffer inputBuffer = inputBuffers[inputBufferIndex];
inputBuffer.clear();
inputBuffer.put(input);
mediaCodec.queueInputBuffer(inputBufferIndex, 0, input.length, 0, 0);
}
MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
int outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo, 0);
while (outputBufferIndex >= 0) {
ByteBuffer outputBuffer = outputBuffers[outputBufferIndex];
byte[] outData = new byte[bufferInfo.size];
outputBuffer.get(outData);
outputStream.write(outData, 0, outData.length);
mediaCodec.releaseOutputBuffer(outputBufferIndex, false);
outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo, 0);
}
} catch (Throwable t) {
}
}
}
對於其他人遇到這個問題:能夠在VLC中播放它是完美的,並表明編碼正在工作。 h264曲目只是「沒有裝盒」,所以玩家無法知道如何播放它。順便說一句,在API 18之前,使用Mp4Parser/IsoParser java庫很容易將它複用。 AVC特別適合並優雅地取代MediaMuxer。 –