android - Imágenes a video usando MediaCodec y MediaMuxer

Question

Tengo un montón de imágenes locales guardadas como archivos jpeg. Mis imágenes se capturan usando CameraPreview y el PreviewFormat es el predeterminado: NV21. Quiero generar un pequeño video a partir de un número fijo de imágenes.

No voy a usar FFMpeg porque requiere NDK y presentaré problemas de compatibilidad.

MediaCodec y MediaMuxer parecen funcionar, pero no hay soluciones que funcionen en la web.

Hay algunas referencias que conducen a mi solución actual.

1. EncodeAndMuxTest : http://bigflake.com/mediacodec/EncodeAndMuxTest.java.txt

Este está escrito por Fadden. Se adapta bastante a mis necesidades, excepto que utiliza createInputSurface, no queueInputBuffer.

2. Convertir una matriz de mapa de bits a YUV (YCbCr NV21)

Hago la conversión siguiendo esta respuesta. https://stackoverflow.com/a/17116985/3047840

3. Usando MediaCodec para guardar series de imágenes como Video

Esta pregunta se parece mucho a la mía, pero no me molesto en usar MediaMuxer.

Mi código es el siguiente:

public class EncodeAndMux extends Activity {
private static final String TAG = "EncodeAndMuxTest";
private static final boolean VERBOSE = false;
private static final File OUTPUT_DIR = Environment
.getExternalStorageDirectory();
private static final String MIME_TYPE = "video/avc";
private static final int FRAME_RATE = 10;
// 10 seconds between I-frames
private static final int IFRAME_INTERVAL = 10;
private static final int NUM_FRAMES = 5;
private static final String DEBUG_FILE_NAME_BASE = "/sdcard/test";
// two seconds of video size of a frame, in pixels
private int mWidth = -1;
private int mHeight = -1;
// bit rate, in bits per second
private int mBitRate = -1;
private byte[] mFrame;
// largest color component delta seen (i.e. actual vs. expected)
private int mLargestColorDelta;
// encoder / muxer state
private MediaCodec mEncoder;
private MediaMuxer mMuxer;
private int mTrackIndex;
private boolean mMuxerStarted;
private Utils mUtils;
private float mPadding;
private int mColumnWidth;
private static final int TEST_Y = 120; // YUV values for colored rect
private static final int TEST_U = 160;
private static final int TEST_V = 200;
private static final int TEST_R0 = 0; // RGB equivalent of {0,0,0}
private static final int TEST_G0 = 136;
private static final int TEST_B0 = 0;
private static final int TEST_R1 = 236; // RGB equivalent of {120,160,200}
private static final int TEST_G1 = 50;
private static final int TEST_B1 = 186;
private static final boolean DEBUG_SAVE_FILE = false; // save copy of
// encoded movie
// allocate one of these up front so we don''t need to do it every time
private MediaCodec.BufferInfo mBufferInfo;
private ArrayList<String> mImagePaths = new ArrayList<String>();
byte[] getNV21(int inputWidth, int inputHeight, Bitmap scaled) {
int[] argb = new int[inputWidth * inputHeight];
scaled.getPixels(argb, 0, inputWidth, 0, 0, inputWidth, inputHeight);
byte[] yuv = new byte[inputWidth * inputHeight * 3 / 2];
encodeYUV420SP(yuv, argb, inputWidth, inputHeight);
scaled.recycle();
return yuv;
}
void encodeYUV420SP(byte[] yuv420sp, int[] argb, int width, int height) {
final int frameSize = width * height;
int yIndex = 0;
int uvIndex = frameSize;
int a, R, G, B, Y, U, V;
int index = 0;
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
a = (argb[index] & 0xff000000) >> 24; // a is not used obviously
R = (argb[index] & 0xff0000) >> 16;
G = (argb[index] & 0xff00) >> 8;
B = (argb[index] & 0xff) >> 0;
// well known RGB to YUV algorithm
Y = ((66 * R + 129 * G + 25 * B + 128) >> 8) + 16;
U = ((-38 * R - 74 * G + 112 * B + 128) >> 8) + 128;
V = ((112 * R - 94 * G - 18 * B + 128) >> 8) + 128;
// NV21 has a plane of Y and interleaved planes of VU each
// sampled by a factor of 2
// meaning for every 4 Y pixels there are 1 V and 1 U. Note the
// sampling is every other
// pixel AND every other scanline.
yuv420sp[yIndex++] = (byte) ((Y < 0) ? 0
: ((Y > 255) ? 255 : Y));
if (j % 2 == 0 && index % 2 == 0) {
yuv420sp[uvIndex++] = (byte) ((V < 0) ? 0
: ((V > 255) ? 255 : V));
yuv420sp[uvIndex++] = (byte) ((U < 0) ? 0
: ((U > 255) ? 255 : U));
}
index++;
}
}
}
public static Bitmap decodeFile(String filePath, int WIDTH, int HIGHT) {
try {
File f = new File(filePath);
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
o.inPurgeable = true;
o.inInputShareable = true;
BitmapFactory.decodeStream(new FileInputStream(f), null, o);
final int REQUIRED_WIDTH = WIDTH;
final int REQUIRED_HIGHT = HIGHT;
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_WIDTH
&& o.outHeight / scale / 2 >= REQUIRED_HIGHT)
scale *= 2;
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
o2.inPurgeable = true;
o2.inInputShareable = true;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_encode_and_mux);
mUtils = new Utils(this);
mImagePaths = mUtils.getBackFilePaths();
mPadding = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
AppConstant.GRID_PADDING, getResources().getDisplayMetrics());
mColumnWidth = (int) ((mUtils.getScreenWidth() - ((AppConstant.NUM_OF_COLUMNS + 1) * mPadding)) / AppConstant.NUM_OF_COLUMNS);
try {
testEncodeDecodeVideoFromBufferToSurface720p();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Returns the first codec capable of encoding the specified MIME type, or null if no
* match was found.
*/
private static MediaCodecInfo selectCodec(String mimeType) {
int numCodecs = MediaCodecList.getCodecCount();
for (int i = 0; i < numCodecs; i++) {
MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
if (!codecInfo.isEncoder()) {
continue;
}
String[] types = codecInfo.getSupportedTypes();
for (int j = 0; j < types.length; j++) {
if (types[j].equalsIgnoreCase(mimeType)) {
return codecInfo;
}
}
}
return null;
}
/**
* Returns a color format that is supported by the codec and by this test code. If no
* match is found, this throws a test failure -- the set of formats known to the test
* should be expanded for new platforms.
*/
private static int selectColorFormat(MediaCodecInfo codecInfo, String mimeType) {
MediaCodecInfo.CodecCapabilities capabilities = codecInfo.getCapabilitiesForType(mimeType);
for (int i = 0; i < capabilities.colorFormats.length; i++) {
int colorFormat = capabilities.colorFormats[i];
if (isRecognizedFormat(colorFormat)) {
return colorFormat;
}
}
Log.e("","couldn''t find a good color format for " + codecInfo.getName() + " / " + mimeType);
return 0; // not reached
}
/**
* Returns true if this is a color format that this test code understands (i.e. we know how
* to read and generate frames in this format).
*/
private static boolean isRecognizedFormat(int colorFormat) {
switch (colorFormat) {
// these are the formats we know how to handle for this test
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar:
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedPlanar:
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar:
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedSemiPlanar:
case MediaCodecInfo.CodecCapabilities.COLOR_TI_FormatYUV420PackedSemiPlanar:
return true;
default:
return false;
}
}
/**
* Returns true if the specified color format is semi-planar YUV. Throws an exception
* if the color format is not recognized (e.g. not YUV).
*/
private static boolean isSemiPlanarYUV(int colorFormat) {
switch (colorFormat) {
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar:
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedPlanar:
return false;
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar:
case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedSemiPlanar:
case MediaCodecInfo.CodecCapabilities.COLOR_TI_FormatYUV420PackedSemiPlanar:
return true;
default:
throw new RuntimeException("unknown format " + colorFormat);
}
}
/**
* Does the actual work for encoding frames from buffers of byte[].
*/
private void doEncodeDecodeVideoFromBuffer(MediaCodec encoder, int encoderColorFormat,
MediaCodec decoder, boolean toSurface) {
final int TIMEOUT_USEC = 10000;
ByteBuffer[] encoderInputBuffers = encoder.getInputBuffers();
ByteBuffer[] encoderOutputBuffers = encoder.getOutputBuffers();
ByteBuffer[] decoderInputBuffers = null;
ByteBuffer[] decoderOutputBuffers = null;
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
MediaFormat decoderOutputFormat = null;
int generateIndex = 0;
int checkIndex = 0;
int badFrames = 0;
boolean decoderConfigured = false;
OutputSurface outputSurface = null;
// The size of a frame of video data, in the formats we handle, is stride*sliceHeight
// for Y, and (stride/2)*(sliceHeight/2) for each of the Cb and Cr channels. Application
// of algebra and assuming that stride==width and sliceHeight==height yields:
// Just out of curiosity.
long rawSize = 0;
long encodedSize = 0;
// Save a copy to disk. Useful for debugging the test. Note this is a raw elementary
// stream, not a .mp4 file, so not all players will know what to do with it.
if (toSurface) {
outputSurface = new OutputSurface(mWidth, mHeight);
}
// Loop until the output side is done.
boolean inputDone = false;
boolean encoderDone = false;
boolean outputDone = false;
while (!outputDone) {
Log.e(TAG, "loop");
// If we''re not done submitting frames, generate a new one and submit it. By
// doing this on every loop we''re working to ensure that the encoder always has
// work to do.
//
// We don''t really want a timeout here, but sometimes there''s a delay opening
// the encoder device, so a short timeout can keep us from spinning hard.
if (!inputDone) {
int inputBufIndex = encoder.dequeueInputBuffer(TIMEOUT_USEC);
Log.e(TAG, "inputBufIndex=" + inputBufIndex);
if (inputBufIndex >= 0) {
long ptsUsec = computePresentationTime(generateIndex);
if (generateIndex == NUM_FRAMES) {
// Send an empty frame with the end-of-stream flag set. If we set EOS
// on a frame with data, that frame data will be ignored, and the
// output will be short one frame.
encoder.queueInputBuffer(inputBufIndex, 0, 0, ptsUsec,
MediaCodec.BUFFER_FLAG_END_OF_STREAM);
inputDone = true;
Log.e(TAG, "sent input EOS (with zero-length frame)");
} else {
generateFrame(generateIndex, encoderColorFormat, mFrame);
//generateFrame(generateIndex);
ByteBuffer inputBuf = encoderInputBuffers[inputBufIndex];
// the buffer should be sized to hold one full frame
inputBuf.clear();
inputBuf.put(mFrame);
encoder.queueInputBuffer(inputBufIndex, 0, mFrame.length, ptsUsec, 0);
Log.e(TAG, "submitted frame " + generateIndex + " to enc");
}
generateIndex++;
} else {
// either all in use, or we timed out during initial setup
Log.e(TAG, "input buffer not available");
}
}
// Check for output from the encoder. If there''s no output yet, we either need to
// provide more input, or we need to wait for the encoder to work its magic. We
// can''t actually tell which is the case, so if we can''t get an output buffer right
// away we loop around and see if it wants more input.
//
// Once we get EOS from the encoder, we don''t need to do this anymore.
if (!encoderDone) {
int encoderStatus = encoder.dequeueOutputBuffer(info, TIMEOUT_USEC);
if (encoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) {
// no output available yet
Log.e(TAG, "no output from encoder available");
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
// not expected for an encoder
encoderOutputBuffers = encoder.getOutputBuffers();
Log.e(TAG, "encoder output buffers changed");
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
// not expected for an encoder
if (mMuxerStarted) {
throw new RuntimeException("format changed twice");
}
MediaFormat newFormat = encoder.getOutputFormat();
Log.e(TAG, "encoder output format changed: " + newFormat);
// now that we have the Magic Goodies, start the muxer
mTrackIndex = mMuxer.addTrack(newFormat);
Log.e(TAG, "muxer defined muxer format: " + newFormat);
mMuxer.start();
mMuxerStarted = true;
} else if (encoderStatus < 0) {
Log.e("","unexpected result from encoder.dequeueOutputBuffer: " + encoderStatus);
} else { // encoderStatus >= 0
ByteBuffer encodedData = encoderOutputBuffers[encoderStatus];
if (encodedData == null) {
Log.e("","encoderOutputBuffer " + encoderStatus + " was null");
}
// It''s usually necessary to adjust the ByteBuffer values to match BufferInfo.
encodedData.position(info.offset);
encodedData.limit(info.offset + info.size);
encodedSize += info.size;
if ((info.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
// Codec config info. Only expected on first packet. One way to
// handle this is to manually stuff the data into the MediaFormat
// and pass that to configure(). We do that here to exercise the API.
MediaFormat format =
MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight);
format.setByteBuffer("csd-0", encodedData);
decoder.configure(format, toSurface ? outputSurface.getSurface() : null,
null, 0);
decoder.start();
decoderInputBuffers = decoder.getInputBuffers();
decoderOutputBuffers = decoder.getOutputBuffers();
decoderConfigured = true;
Log.e(TAG, "decoder configured (" + info.size + " bytes)"+format);
} else {
// Get a decoder input buffer, blocking until it''s available.
int inputBufIndex = decoder.dequeueInputBuffer(-1);
ByteBuffer inputBuf = decoderInputBuffers[inputBufIndex];
inputBuf.clear();
inputBuf.put(encodedData);
decoder.queueInputBuffer(inputBufIndex, 0, info.size,
info.presentationTimeUs, info.flags);
encoderDone = (info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0;
Log.e(TAG, "passed " + info.size + " bytes to decoder"
+ (encoderDone ? " (EOS)" : ""));
Log.e("encoderDone",encoderDone+"");
}
encoder.releaseOutputBuffer(encoderStatus, false);
}
}
// Check for output from the decoder. We want to do this on every loop to avoid
// the possibility of stalling the pipeline. We use a short timeout to avoid
// burning CPU if the decoder is hard at work but the next frame isn''t quite ready.
//
// If we''re decoding to a Surface, we''ll get notified here as usual but the
// ByteBuffer references will be null. The data is sent to Surface instead.
if (decoderConfigured) {
int decoderStatus = decoder.dequeueOutputBuffer(info, 3*TIMEOUT_USEC);
if (decoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) {
// no output available yet
Log.e(TAG, "no output from decoder available");
} else if (decoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
// The storage associated with the direct ByteBuffer may already be unmapped,
// so attempting to access data through the old output buffer array could
// lead to a native crash.
Log.e(TAG, "decoder output buffers changed");
decoderOutputBuffers = decoder.getOutputBuffers();
} else if (decoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
// this happens before the first frame is returned
decoderOutputFormat = decoder.getOutputFormat();
Log.e(TAG, "decoder output format changed: " +
decoderOutputFormat);
} else if (decoderStatus < 0) {
Log.e(TAG, "unexpected result from deocder.dequeueOutputBuffer: " + decoderStatus);
} else { // decoderStatus >= 0
if (!toSurface) {
ByteBuffer outputFrame = decoderOutputBuffers[decoderStatus];
outputFrame.position(info.offset);
outputFrame.limit(info.offset + info.size);
mMuxer.writeSampleData(mTrackIndex, outputFrame,
info);
rawSize += info.size;
if (info.size == 0) {
Log.e(TAG, "got empty frame");
} else {
Log.e(TAG, "decoded, checking frame " + checkIndex);
if (!checkFrame(checkIndex++, decoderOutputFormat, outputFrame)) {
badFrames++;
}
}
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
Log.e(TAG, "output EOS");
outputDone = true;
}
decoder.releaseOutputBuffer(decoderStatus, false /*render*/);
} else {
Log.e(TAG, "surface decoder given buffer " + decoderStatus +
" (size=" + info.size + ")");
rawSize += info.size;
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
Log.e(TAG, "output EOS");
outputDone = true;
}
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.
decoder.releaseOutputBuffer(decoderStatus, doRender);
if (doRender) {
Log.e(TAG, "awaiting frame " + checkIndex);
outputSurface.awaitNewImage();
outputSurface.drawImage();
if (!checkSurfaceFrame(checkIndex++)) {
badFrames++;
}
}
}
}
}
}
Log.e(TAG, "decoded " + checkIndex + " frames at "
+ mWidth + "x" + mHeight + ": raw=" + rawSize + ", enc=" + encodedSize);
if (outputSurface != null) {
outputSurface.release();
}
if (checkIndex != NUM_FRAMES) {
Log.e(TAG, "awaiting frame " + checkIndex);
}
if (badFrames != 0) {
Log.e(TAG, "Found " + badFrames + " bad frames");
}
}
private void generateFrame(int frameIndex) {
Bitmap bitmap = decodeFile(mImagePaths.get(frameIndex), mColumnWidth,
mColumnWidth);
mFrame = getNV21(bitmap.getWidth(), bitmap.getHeight(), bitmap);
}
/**
* Generates data for frame N into the supplied buffer. We have an 8-frame animation
* sequence that wraps around. It looks like this:
* <pre>
* 0 1 2 3
* 7 6 5 4
* </pre>
* We draw one of the eight rectangles and leave the rest set to the zero-fill color.
*/
private void generateFrame(int frameIndex, int colorFormat, byte[] mFrame) {
final int HALF_WIDTH = mWidth / 2;
boolean semiPlanar = isSemiPlanarYUV(colorFormat);
// Set to zero. In YUV this is a dull green.
Arrays.fill(mFrame, (byte) 0);
int startX, startY, countX, countY;
frameIndex %= 8;
//frameIndex = (frameIndex / 8) % 8; // use this instead for debug -- easier to see
if (frameIndex < 4) {
startX = frameIndex * (mWidth / 4);
startY = 0;
} else {
startX = (7 - frameIndex) * (mWidth / 4);
startY = mHeight / 2;
}
for (int y = startY + (mHeight/2) - 1; y >= startY; --y) {
for (int x = startX + (mWidth/4) - 1; x >= startX; --x) {
if (semiPlanar) {
// full-size Y, followed by UV pairs at half resolution
// e.g. Nexus 4 OMX.qcom.video.encoder.avc COLOR_FormatYUV420SemiPlanar
// e.g. Galaxy Nexus OMX.TI.DUCATI1.VIDEO.H264E
// OMX_TI_COLOR_FormatYUV420PackedSemiPlanar
mFrame[y * mWidth + x] = (byte) TEST_Y;
if ((x & 0x01) == 0 && (y & 0x01) == 0) {
mFrame[mWidth*mHeight + y * HALF_WIDTH + x] = (byte) TEST_U;
mFrame[mWidth*mHeight + y * HALF_WIDTH + x + 1] = (byte) TEST_V;
}
} else {
// full-size Y, followed by quarter-size U and quarter-size V
// e.g. Nexus 10 OMX.Exynos.AVC.Encoder COLOR_FormatYUV420Planar
// e.g. Nexus 7 OMX.Nvidia.h264.encoder COLOR_FormatYUV420Planar
mFrame[y * mWidth + x] = (byte) TEST_Y;
if ((x & 0x01) == 0 && (y & 0x01) == 0) {
mFrame[mWidth*mHeight + (y/2) * HALF_WIDTH + (x/2)] = (byte) TEST_U;
mFrame[mWidth*mHeight + HALF_WIDTH * (mHeight / 2) +
(y/2) * HALF_WIDTH + (x/2)] = (byte) TEST_V;
}
}
}
}
}
/**
* Sets the desired frame size and bit rate.
*/
private void setParameters(int width, int height, int bitRate) {
if ((width % 16) != 0 || (height % 16) != 0) {
Log.w(TAG, "WARNING: width or height not multiple of 16");
}
mWidth = width;
mHeight = height;
mBitRate = bitRate;
mFrame = new byte[mWidth * mHeight * 3 / 2];
}
public void testEncodeDecodeVideoFromBufferToSurface720p() throws Throwable {
setParameters(1280, 720, 6000000);
encodeDecodeVideoFromBuffer(false);
}

}

Logcat:

 12-17 18:25:47.405: E/EncodeAndMuxTest(16415): found codec: OMX.qcom.video.encoder.avc
12-17 18:25:47.405: I/OMXClient(16415): Using client-side OMX mux.
12-17 18:25:47.455: E/EncodeAndMuxTest(16415): found colorFormat: 21
12-17 18:25:47.455: E/EncodeAndMuxTest(16415): format: {frame-rate=10, bitrate=6000000, height=720, mime=video/avc, color-format=21, i-frame-interval=10, width=1280}
12-17 18:25:47.465: I/OMXClient(16415): Using client-side OMX mux.
12-17 18:25:47.495: E/ACodec(16415): [OMX.qcom.video.encoder.avc] storeMetaDataInBuffers (output) failed w/ err -2147483648
12-17 18:25:47.495: I/ACodec(16415): setupVideoEncoder succeeded
12-17 18:25:47.535: I/OMXClient(16415): Using client-side OMX mux.
12-17 18:25:47.545: E/EncodeAndMuxTest(16415): loop
12-17 18:25:47.545: E/EncodeAndMuxTest(16415): inputBufIndex=0
12-17 18:25:47.655: E/EncodeAndMuxTest(16415): submitted frame 0 to enc
12-17 18:25:47.655: E/EncodeAndMuxTest(16415): encoder output format changed: {csd-1=java.nio.ByteArrayBuffer[position=0,limit=8,capacity=8], height=720, mime=video/avc, csd-0=java.nio.ByteArrayBuffer[position=0,limit=18,capacity=18], what=1869968451, width=1280}
12-17 18:25:47.655: E/EncodeAndMuxTest(16415): muxer defined muxer format: {csd-1=java.nio.ByteArrayBuffer[position=0,limit=8,capacity=8], height=720, mime=video/avc, csd-0=java.nio.ByteArrayBuffer[position=0,limit=18,capacity=18], what=1869968451, width=1280}
12-17 18:25:47.655: I/MPEG4Writer(16415): limits: 2147483647/0 bytes/us, bit rate: -1 bps and the estimated moov size 3072 bytes
12-17 18:25:47.655: E/EncodeAndMuxTest(16415): inputBufIndex=2
12-17 18:25:47.795: E/EncodeAndMuxTest(16415): submitted frame 1 to enc
12-17 18:25:47.825: E/EncodeAndMuxTest(16415): decoder configured (26 bytes){csd-0=java.nio.DirectByteBuffer[position=0,limit=26,capacity=692224], height=720, width=1280, mime=video/avc}
12-17 18:25:47.855: E/EncodeAndMuxTest(16415): no output from decoder available
12-17 18:25:47.855: E/EncodeAndMuxTest(16415): inputBufIndex=0
12-17 18:25:47.976: E/EncodeAndMuxTest(16415): submitted frame 2 to enc
12-17 18:25:48.136: E/EncodeAndMuxTest(16415): passed 3188 bytes to decoder
12-17 18:25:48.176: E/EncodeAndMuxTest(16415): no output from decoder available
12-17 18:25:48.176: E/EncodeAndMuxTest(16415): inputBufIndex=1
12-17 18:25:48.296: E/EncodeAndMuxTest(16415): submitted frame 3 to enc
12-17 18:25:48.296: E/EncodeAndMuxTest(16415): passed 1249 bytes to decoder
12-17 18:25:48.326: E/EncodeAndMuxTest(16415): no output from decoder available
12-17 18:25:48.326: E/EncodeAndMuxTest(16415): loop
12-17 18:25:48.326: E/EncodeAndMuxTest(16415): inputBufIndex=2
12-17 18:25:48.396: E/EncodeAndMuxTest(16415): submitted frame 4 to enc
12-17 18:25:48.396: E/EncodeAndMuxTest(16415): passed 3085 bytes to decoder
12-17 18:25:48.436: E/EncodeAndMuxTest(16415): no output from decoder available
12-17 18:25:48.436: E/EncodeAndMuxTest(16415): inputBufIndex=0
12-17 18:25:48.436: E/EncodeAndMuxTest(16415): sent input EOS (with zero-length frame)
12-17 18:25:48.436: E/EncodeAndMuxTest(16415): passed 3056 bytes to decoder
12-17 18:25:48.466: E/EncodeAndMuxTest(16415): no output from decoder available
12-17 18:25:48.466: E/EncodeAndMuxTest(16415): passed 1085 bytes to decoder (EOS)
12-17 18:25:48.476: E/EncodeAndMuxTest(16415): decoder output buffers changed
12-17 18:25:48.496: E/EncodeAndMuxTest(16415): decoder output format changed:

Answer 1

Leer los archivos JPEG, descomprimirlos y luego volver a comprimirlos causará la pérdida de la calidad de la imagen (y tomará tiempo y esfuerzo de la CPU) simplemente agregándolos por completo y lanzándolos en un contenedor de video será más rápido y producirá un mejor video.

El formato de video MJpeg es bastante antiguo, por lo que (casi) cualquier programa puede reproducir videos Mjpeg.

Sugiero una solución similar a esta http://sourceforge.net/projects/jpegtoavi/ IE: haga una película Mjpeg desde sus archivos JPEG. Hay más de ese Programa para elegir, use un Motor de búsqueda (o nuestra Barra de búsqueda) para encontrar más Código fuente.

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Probé mi teléfono para ver si puede entender Mjpegs creando un archivo usando este comando:

ffmpeg.exe -i test_in.mp4 -vcodec mjpeg -acodec copy test_out.mp4

En: Stream # 0: 0 (und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1: 1 DAR 16: 9], 1568 kb / s, 29.97 fps, 29.97 tbr, 90k tbn , 59.94 tbc (por defecto)
Salida: Transmisión # 0: 0 (und): Video: mjpeg (l [0] [0] [0] / 0x006C), yuvj420p, 1280x720 [SAR 1: 1 DAR 16: 9], q = 2-31, 200 kb / s, 30k tbn, 29.97 tbc (predeterminado)

Desafortunadamente, el "Reproductor de Galería" de Android es uno de los Programas que no entiende ese formato, pero BSPlayer, VLC y MPlayer para Android pueden reproducir ese Formato si desea que el Video resultante se reproduzca en su teléfono (sin escribir más Código).