本文整理汇总了Java中android.media.MediaExtractor.seekTo方法的典型用法代码示例。如果您正苦于以下问题：Java MediaExtractor.seekTo方法的具体用法？Java MediaExtractor.seekTo怎么用？Java MediaExtractor.seekTo使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类android.media.MediaExtractor的用法示例。
在下文中一共展示了MediaExtractor.seekTo方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: verifySamplesMatch
import android.media.MediaExtractor; //导入方法依赖的package包/类
/**
* Uses 2 MediaExtractor, seeking to the same position, reads the sample and
* makes sure the samples match.
*/
private void verifySamplesMatch(int srcMedia, String testMediaPath,
int seekToUs) throws IOException {
AssetFileDescriptor testFd = mResources.openRawResourceFd(srcMedia);
MediaExtractor extractorSrc = new MediaExtractor();
extractorSrc.setDataSource(testFd.getFileDescriptor(),
testFd.getStartOffset(), testFd.getLength());
int trackCount = extractorSrc.getTrackCount();
MediaExtractor extractorTest = new MediaExtractor();
extractorTest.setDataSource(testMediaPath);
assertEquals("wrong number of tracks", trackCount,
extractorTest.getTrackCount());
// Make sure the format is the same and select them
for (int i = 0; i < trackCount; i++) {
MediaFormat formatSrc = extractorSrc.getTrackFormat(i);
MediaFormat formatTest = extractorTest.getTrackFormat(i);
String mimeIn = formatSrc.getString(MediaFormat.KEY_MIME);
String mimeOut = formatTest.getString(MediaFormat.KEY_MIME);
if (!(mimeIn.equals(mimeOut))) {
fail("format didn't match on track No." + i +
formatSrc.toString() + "\n" + formatTest.toString());
}
extractorSrc.selectTrack(i);
extractorTest.selectTrack(i);
}
// Pick a time and try to compare the frame.
extractorSrc.seekTo(seekToUs, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
extractorTest.seekTo(seekToUs, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
int bufferSize = MAX_SAMPLE_SIZE;
ByteBuffer byteBufSrc = ByteBuffer.allocate(bufferSize);
ByteBuffer byteBufTest = ByteBuffer.allocate(bufferSize);
extractorSrc.readSampleData(byteBufSrc, 0);
extractorTest.readSampleData(byteBufTest, 0);
if (!(byteBufSrc.equals(byteBufTest))) {
fail("byteBuffer didn't match");
}
}
示例2: verifySamplesMatch
import android.media.MediaExtractor; //导入方法依赖的package包/类
/**
* Uses 2 MediaExtractor, seeking to the same position, reads the sample and
* makes sure the samples match.
*/
private void verifySamplesMatch(int srcMedia, String testMediaPath,
int seekToUs) throws IOException {
AssetFileDescriptor testFd = mResources.openRawResourceFd(srcMedia);
MediaExtractor extractorSrc = new MediaExtractor();
extractorSrc.setDataSource(testFd.getFileDescriptor(),
testFd.getStartOffset(), testFd.getLength());
int trackCount = extractorSrc.getTrackCount();
MediaExtractor extractorTest = new MediaExtractor();
extractorTest.setDataSource(testMediaPath);
assertEquals("wrong number of tracks", trackCount,
extractorTest.getTrackCount());
// Make sure the format is the same and select them
for (int i = 0; i < trackCount; i++) {
MediaFormat formatSrc = extractorSrc.getTrackFormat(i);
MediaFormat formatTest = extractorTest.getTrackFormat(i);
String mimeIn = formatSrc.getString(MediaFormat.KEY_MIME);
String mimeOut = formatTest.getString(MediaFormat.KEY_MIME);
if (!(mimeIn.equals(mimeOut))) {
fail("format didn't match on track No." + i +
formatSrc.toString() + "\n" + formatTest.toString());
}
extractorSrc.selectTrack(i);
extractorTest.selectTrack(i);
}
// Pick a time and try to compare the frame.
extractorSrc.seekTo(seekToUs, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
extractorTest.seekTo(seekToUs, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
int bufferSize = MAX_SAMPLE_SIZE;
ByteBuffer byteBufSrc = ByteBuffer.allocate(bufferSize);
ByteBuffer byteBufTest = ByteBuffer.allocate(bufferSize);
extractorSrc.readSampleData(byteBufSrc, 0);
extractorTest.readSampleData(byteBufTest, 0);
if (!(byteBufSrc.equals(byteBufTest))) {
fail("byteBuffer didn't match");
}
}
示例3: readAndWriteTrack
import android.media.MediaExtractor; //导入方法依赖的package包/类
@TargetApi(16)
private long readAndWriteTrack(final MessageObject messageObject, MediaExtractor extractor, MP4Builder mediaMuxer, MediaCodec.BufferInfo info, long start, long end, File file, boolean isAudio) throws Exception {
int trackIndex = selectTrack(extractor, isAudio);
if (trackIndex >= 0) {
extractor.selectTrack(trackIndex);
MediaFormat trackFormat = extractor.getTrackFormat(trackIndex);
int muxerTrackIndex = mediaMuxer.addTrack(trackFormat, isAudio);
int maxBufferSize = trackFormat.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);
boolean inputDone = false;
if (start > 0) {
extractor.seekTo(start, MediaExtractor.SEEK_TO_PREVIOUS_SYNC);
} else {
extractor.seekTo(0, MediaExtractor.SEEK_TO_PREVIOUS_SYNC);
}
ByteBuffer buffer = ByteBuffer.allocateDirect(maxBufferSize);
long startTime = -1;
checkConversionCanceled();
long lastTimestamp = -100;
while (!inputDone) {
checkConversionCanceled();
boolean eof = false;
int index = extractor.getSampleTrackIndex();
if (index == trackIndex) {
info.size = extractor.readSampleData(buffer, 0);
if (info.size >= 0) {
info.presentationTimeUs = extractor.getSampleTime();
} else {
info.size = 0;
eof = true;
}
if (info.size > 0 && !eof) {
if (start > 0 && startTime == -1) {
startTime = info.presentationTimeUs;
}
if (end < 0 || info.presentationTimeUs < end) {
if (info.presentationTimeUs > lastTimestamp) {
info.offset = 0;
info.flags = extractor.getSampleFlags();
if (mediaMuxer.writeSampleData(muxerTrackIndex, buffer, info, isAudio)) {
didWriteData(messageObject, file, false, false);
}
}
lastTimestamp = info.presentationTimeUs;
} else {
eof = true;
}
}
if (!eof) {
extractor.advance();
}
} else if (index == -1) {
eof = true;
} else {
extractor.advance();
}
if (eof) {
inputDone = true;
}
}
extractor.unselectTrack(trackIndex);
return startTime;
}
return -1;
}
示例4: readAndWriteTrack
import android.media.MediaExtractor; //导入方法依赖的package包/类
@TargetApi(16)
private long readAndWriteTrack(MediaExtractor extractor, MP4Builder mediaMuxer, MediaCodec.BufferInfo info, long start, long end, File file, boolean isAudio) throws Exception {
int trackIndex = selectTrack(extractor, isAudio);
if (trackIndex >= 0) {
extractor.selectTrack(trackIndex);
MediaFormat trackFormat = extractor.getTrackFormat(trackIndex);
int muxerTrackIndex = mediaMuxer.addTrack(trackFormat, isAudio);
int maxBufferSize = trackFormat.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);
boolean inputDone = false;
if (start > 0) {
extractor.seekTo(start, MediaExtractor.SEEK_TO_PREVIOUS_SYNC);
} else {
extractor.seekTo(0, MediaExtractor.SEEK_TO_PREVIOUS_SYNC);
}
ByteBuffer buffer = ByteBuffer.allocateDirect(maxBufferSize);
long startTime = -1;
while (!inputDone) {
boolean eof = false;
int index = extractor.getSampleTrackIndex();
if (index == trackIndex) {
info.size = extractor.readSampleData(buffer, 0);
if (info.size < 0) {
info.size = 0;
eof = true;
} else {
info.presentationTimeUs = extractor.getSampleTime();
if (start > 0 && startTime == -1) {
startTime = info.presentationTimeUs;
}
if (end < 0 || info.presentationTimeUs < end) {
info.offset = 0;
info.flags = extractor.getSampleFlags();
if (mediaMuxer.writeSampleData(muxerTrackIndex, buffer, info, isAudio)) {
// didWriteData(messageObject, file, false, false);
}
extractor.advance();
} else {
eof = true;
}
}
} else if (index == -1) {
eof = true;
}
if (eof) {
inputDone = true;
}
}
extractor.unselectTrack(trackIndex);
return startTime;
}
return -1;
}
示例5: feedClipToEncoder
import android.media.MediaExtractor; //导入方法依赖的package包/类
private void feedClipToEncoder( SamplerClip clip ) {
mLastSampleTime = 0;
MediaCodec decoder = null;
MediaExtractor extractor = setupExtractorForClip(clip);
if(extractor == null ) {
return;
}
int trackIndex = getVideoTrackIndex(extractor);
extractor.selectTrack( trackIndex );
MediaFormat clipFormat = extractor.getTrackFormat( trackIndex );
if ( clip.getStartTime() != -1 ) {
extractor.seekTo( clip.getStartTime() * 1000, MediaExtractor.SEEK_TO_PREVIOUS_SYNC );
clip.setStartTime( extractor.getSampleTime() / 1000 );
}
try {
decoder = MediaCodec.createDecoderByType( MediaHelper.MIME_TYPE_AVC );
mOutputSurface = new OutputSurface();
decoder.configure( clipFormat, mOutputSurface.getSurface(), null, 0 );
decoder.start();
resampleVideo( extractor, decoder, clip );
} finally {
if ( mOutputSurface != null ) {
mOutputSurface.release();
}
if ( decoder != null ) {
decoder.stop();
decoder.release();
}
if ( extractor != null ) {
extractor.release();
extractor = null;
}
}
}