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I have an mp4 video in my sd card
MediaFormat = {
repeat-previous-frame-after=66666,
mime=video/avc,
frame-rate=15,
color-format=2130708361,
height=720,
width=1280,
bitrate=1000000,
i-frame-interval=1
}
If I set Surface in MediaCodec.Decoder configure then image is created correctly.
If I don't and create Bitmap with ByteBuffer I get an incorrect color image.
I tried YuvImage, and method for converting YUV420 to RGB, and ScriptIntrinsicYuvToRGB but can't get a correct bitmap;
I need to create a Bitmap and not setting surface in MediaCodec.Decoder.configure!
private class PlayerThread extends Thread {
private MediaExtractor extractor;
private MediaCodec decoder;
private Surface surface;
private boolean needStop = false;
final int TIMEOUT_USEC = 10000;
PlayerThread(Surface surface) {
this.surface = surface;
}
@Override
public void run() {
extractor = new MediaExtractor();
try {
extractor.setDataSource(SAMPLE);
} catch (IOException e) {
e.printStackTrace();
}
for (int i = 0; i < extractor.getTrackCount(); i++) {
MediaFormat format = extractor.getTrackFormat(i);
String mime = format.getString(MediaFormat.KEY_MIME);
if (mime.startsWith("video/")) {
extractor.selectTrack(i);
try {
decoder = MediaCodec.createDecoderByType(mime);
} catch (IOException e) {
e.printStackTrace();
}
decoder.configure(format, /*surface*/ null, null, 0);
break;
}
}
if (decoder == null) {
return;
}
decoder.start();
ByteBuffer[] inputBuffers = decoder.getInputBuffers();
ByteBuffer[] outputBuffers = decoder.getOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
long startMs = System.currentTimeMillis();
boolean isEOS = false;
while (!Thread.interrupted() && !needStop) {
if (!isEOS) {
int inIndex = -1;
try {
inIndex = decoder.dequeueInputBuffer(TIMEOUT_USEC);
} catch (IllegalStateException e) {
e.printStackTrace();
}
if (inIndex >= 0) {
ByteBuffer buffer = inputBuffers[inIndex];
int sampleSize = extractor.readSampleData(buffer, 0);
if (sampleSize < 0) {
if (!needStop) {
decoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
isEOS = true;
}
} else {
try {
if (!needStop) {
decoder.queueInputBuffer(inIndex, 0, sampleSize, extractor.getSampleTime(), 0);
extractor.advance();
}
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
}
}
int outIndex = MediaCodec.INFO_TRY_AGAIN_LATER;
try {
if (!needStop) {
outIndex = decoder.dequeueOutputBuffer(info, TIMEOUT_USEC);
}
} catch (IllegalStateException e) {
e.printStackTrace();
}
switch (outIndex) {
case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:
outputBuffers = decoder.getOutputBuffers();
break;
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
break;
case MediaCodec.INFO_TRY_AGAIN_LATER:
break;
default:
ByteBuffer buffer = outputBuffers[outIndex];
buffer.position(info.offset);
buffer.limit(info.offset + info.size);
byte[] ba = new byte[buffer.remaining()];
buffer.get(ba);
//this i use many algorithm conversion for get bitmap
YuvImage yuvimage = new YuvImage(ba, ImageFormat.NV21, 1280, 720, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
yuvimage.compressToJpeg(new Rect(0, 0, 1280, 720), 80, baos);
byte[] jdata = baos.toByteArray();
final Bitmap bmp = BitmapFactory.decodeByteArray(jdata, 0, jdata.length);
if (bmp != null) {
srcRect.left = 0;
srcRect.top = 0;
srcRect.bottom = 720;
srcRect.right = 1280;
Canvas canvas = surface.lockCanvas(dstRect);
try {
if (canvas != null) {
canvas.drawBitmap(bmp, srcRect, dstRect, null);
}
} finally {
if (canvas != null) {
surface.unlockCanvasAndPost(canvas);
}
}
} else {
Log.e(TAG, "bmp = BAD");
}
while (info.presentationTimeUs / 1000 > System.currentTimeMillis() -
startMs && !needStop) {
try {
sleep(10);
} catch (InterruptedException e) {
PlayerThread.this.interrupt();
e.printStackTrace();
break;
}
}
decoder.releaseOutputBuffer(outIndex, false);
break;
}
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
break;
}
}
decoder.stop();
decoder.release();
extractor.release();
}
}
How to correct the conversion ByteBuffer (decoder) in Bitmap?
739
asked Dec 01 '25 06:12
I found solution for my problem. Now i don't use ByteBuffer and get with decoder Image and it help me in may problem
Now need refactoring code and implement variables such as video Size, surface size in dynamic mode
Corrected code
private class PlayerThread extends Thread {
private MediaExtractor extractor;
private MediaCodec decoder;
private Surface surface;
private boolean needStop = false;
final int TIMEOUT_USEC = 10000;
PlayerThread(Surface surface) {
this.surface = surface;
}
@Override
public void run() {
extractor = new MediaExtractor();
try {
extractor.setDataSource(SAMPLE); //path MP4 file
} catch (IOException e) {
e.printStackTrace();
}
for (int i = 0; i < extractor.getTrackCount(); i++) {
MediaFormat format = extractor.getTrackFormat(i);
String mime = format.getString(MediaFormat.KEY_MIME);
if (mime.startsWith("video/")) {
extractor.selectTrack(i);
try {
decoder = MediaCodec.createDecoderByType(mime);
} catch (IOException e) {
e.printStackTrace();
}
decoder.configure(format, /*surface*/ null, null, 0);
break;
}
}
if (decoder == null) {
return;
}
decoder.start();
ByteBuffer[] inputBuffers = decoder.getInputBuffers();
ByteBuffer[] outputBuffers = decoder.getOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
long startMs = System.currentTimeMillis();
boolean isEOS = false;
while (!Thread.interrupted() && !needStop) {
if (!isEOS) {
int inIndex = -1;
try {
inIndex = decoder.dequeueInputBuffer(TIMEOUT_USEC);
} catch (IllegalStateException e) {
e.printStackTrace();
}
if (inIndex >= 0) {
ByteBuffer buffer = inputBuffers[inIndex];
int sampleSize = extractor.readSampleData(buffer, 0);
if (sampleSize < 0) {
if (!needStop) {
decoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
isEOS = true;
}
} else {
try {
if (!needStop) {
decoder.queueInputBuffer(inIndex, 0, sampleSize, extractor.getSampleTime(), 0);
extractor.advance();
}
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
}
}
int outIndex = MediaCodec.INFO_TRY_AGAIN_LATER;
try {
if (!needStop) {
outIndex = decoder.dequeueOutputBuffer(info, TIMEOUT_USEC);
}
} catch (IllegalStateException e) {
e.printStackTrace();
}
switch (outIndex) {
case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:
outputBuffers = decoder.getOutputBuffers();
break;
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
break;
case MediaCodec.INFO_TRY_AGAIN_LATER:
break;
default:
Image image = decoder.getOutputImage(outIndex);
Image.Plane[] plants = image.getPlanes();
Bitmap bmp = null;
if (plants != null && plants.length > 0) {
YuvImage yuvimage = new YuvImage(YUV_420_888toNV21(image), ImageFormat.NV21, 1280, 720, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
yuvimage.compressToJpeg(new Rect(0, 0, 1280, 720), 80, baos);
byte[] jdata = baos.toByteArray();
bmp = BitmapFactory.decodeByteArray(jdata, 0, jdata.length);
}
if (bmp != null) {
srcRect.left = 0;
srcRect.top = 0;
srcRect.bottom = 720;
srcRect.right = 1280;
Canvas canvas = surface.lockCanvas(dstRect);
try {
if (canvas != null) {
canvas.drawBitmap(bmp, srcRect, dstRect /*0,0, surfaceChanged
dstRect.right = width;
dstRect.bottom = height;*/,
null);
}
} finally {
if (canvas != null) {
surface.unlockCanvasAndPost(canvas);
}
}
}
while (info.presentationTimeUs / 1000 > System.currentTimeMillis() -
startMs && !needStop) {
try {
sleep(10);
} catch (InterruptedException e) {
PlayerThread.this.interrupt();
e.printStackTrace();
break;
}
}
decoder.releaseOutputBuffer(outIndex, false);
break;
}
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
break;
}
}
decoder.stop();
decoder.release();
extractor.release();
}
}
private static byte[] YUV_420_888toNV21(Image image) {
byte[] nv21;
ByteBuffer yBuffer = image.getPlanes()[0].getBuffer();
ByteBuffer uBuffer = image.getPlanes()[1].getBuffer();
ByteBuffer vBuffer = image.getPlanes()[2].getBuffer();
int ySize = yBuffer.remaining();
int uSize = uBuffer.remaining();
int vSize = vBuffer.remaining();
nv21 = new byte[ySize + uSize + vSize];
//U and V are swapped
yBuffer.get(nv21, 0, ySize);
vBuffer.get(nv21, ySize, vSize);
uBuffer.get(nv21, ySize + vSize, uSize);
return nv21;
}
167
answered Dec 03 '25 20:12
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