我在Windows 10上使用 private void muxing() {
String outputFile = "";
try {
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/output1.mp4");
file.createNewFile();
outputFile = file.getAbsolutePath();
MediaExtractor videoExtractor = new MediaExtractor();
videoExtractor.setDataSource(mVideoFileName);
MediaExtractor audioExtractor = new MediaExtractor();
audioExtractor.setDataSource(Environment.getExternalStorageDirectory().getAbsolutePath() + "/kiki.aac");
Log.d(TAG, "Video Extractor Track Count " + videoExtractor.getTrackCount());
Log.d(TAG, "Audio Extractor Track Count " + audioExtractor.getTrackCount());
MediaMuxer muxer = new MediaMuxer(outputFile, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
videoExtractor.selectTrack(0);
MediaFormat videoFormat = videoExtractor.getTrackFormat(0);
int videoTrack = muxer.addTrack(videoFormat);
audioExtractor.selectTrack(0);
MediaFormat audioFormat = audioExtractor.getTrackFormat(0);
int audioTrack = muxer.addTrack(audioFormat);
Log.d(TAG, "Video Format " + videoFormat.toString());
Log.d(TAG, "Audio Format " + audioFormat.toString());
boolean sawEOS = false;
int frameCount = 0;
int offset = 100;
int sampleSize = 256 * 1024;
ByteBuffer videoBuf = ByteBuffer.allocate(sampleSize);
ByteBuffer audioBuf = ByteBuffer.allocate(sampleSize);
MediaCodec.BufferInfo videoBufferInfo = new MediaCodec.BufferInfo();
MediaCodec.BufferInfo audioBufferInfo = new MediaCodec.BufferInfo();
videoExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
audioExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
muxer.start();
while (!sawEOS) {
videoBufferInfo.offset = offset;
videoBufferInfo.size = videoExtractor.readSampleData(videoBuf, offset);
if (videoBufferInfo.size < 0 || audioBufferInfo.size < 0) {
Log.d(TAG, "saw input EOS.");
sawEOS = true;
videoBufferInfo.size = 0;
} else {
videoBufferInfo.presentationTimeUs = videoExtractor.getSampleTime();
videoBufferInfo.flags = videoExtractor.getSampleFlags();
muxer.writeSampleData(videoTrack, videoBuf, videoBufferInfo);
videoExtractor.advance();
frameCount++;
Log.d(TAG, "Frame (" + frameCount + ") Video PresentationTimeUs:" + videoBufferInfo.presentationTimeUs + " Flags:" + videoBufferInfo.flags + " Size(KB) " + videoBufferInfo.size / 1024);
Log.d(TAG, "Frame (" + frameCount + ") Audio PresentationTimeUs:" + audioBufferInfo.presentationTimeUs + " Flags:" + audioBufferInfo.flags + " Size(KB) " + audioBufferInfo.size / 1024);
}
}
Toast.makeText(getApplicationContext(), "frame:" + frameCount, Toast.LENGTH_SHORT).show();
boolean sawEOS2 = false;
int frameCount2 = 0;
while (!sawEOS2) {
frameCount2++;
audioBufferInfo.offset = offset;
audioBufferInfo.size = audioExtractor.readSampleData(audioBuf, offset);
if (videoBufferInfo.size < 0 || audioBufferInfo.size < 0) {
Log.d(TAG, "saw input EOS.");
sawEOS2 = true;
audioBufferInfo.size = 0;
} else {
audioBufferInfo.presentationTimeUs = audioExtractor.getSampleTime();
audioBufferInfo.flags = audioExtractor.getSampleFlags();
muxer.writeSampleData(audioTrack, audioBuf, audioBufferInfo);
audioExtractor.advance();
Log.d(TAG, "Frame (" + frameCount + ") Video PresentationTimeUs:" + videoBufferInfo.presentationTimeUs + " Flags:" + videoBufferInfo.flags + " Size(KB) " + videoBufferInfo.size / 1024);
Log.d(TAG, "Frame (" + frameCount + ") Audio PresentationTimeUs:" + audioBufferInfo.presentationTimeUs + " Flags:" + audioBufferInfo.flags + " Size(KB) " + audioBufferInfo.size / 1024);
}
}
Toast.makeText(getApplicationContext(), "frame:" + frameCount2, Toast.LENGTH_SHORT).show();
muxer.stop();
muxer.release();
} catch (IOException e) {
Log.d(TAG, "Mixer Error 1 " + e.getMessage());
} catch (Exception e) {
Log.d(TAG, "Mixer Error 2 " + e.getMessage());
}
命令创建了Neo4j数据库。
之后，我看到在
下成功创建了数据库neo4j-admin.bat import现在如何在Neo4j Desktop中访问/使用此数据库？我正在寻找将这个新创建的数据库添加到我的项目中的方法，但是我只看到
的选项（a）创建局部图并
（b）连接到远程图。
我试图连接到本地数据库，但是在导入过程中没有为graph2.db设置用户名/密码，所以这也不起作用。
答案 0 :(得分：2)
您需要创建一个本地数据库。
然后打开数据库的文件夹，并将您的graph.db文件夹复制到neo4j文件夹data/databases中（重要：此文件夹的名称必须为graph.db，而不是graph2.db ）。
作为参考，登录名/密码未存储在graph.db内。