我可以使用以下内容从一组图像创建带有jcodec的视频，但无法添加音频。
public void createVideo()
{
SequenceEncoder se = null;
try {
File dir=new File(Environment.getExternalStorageDirectory()+ "/" + "DCIM/");
// if(!video.exists())
// {
File video = File.createTempFile("jcodec_enc",".mp4",dir);
// }
Log.e("Test ","File created");
se = new SequenceEncoder(video);
String directoryPath = Environment.getExternalStorageDirectory() /*+ "/" + "DCIM"*/ + "/Test/";
File directory = new File(directoryPath);
File[] files = directory.listFiles();
for (int i = 0;i<files.length; i++) {
if (!files[i].isDirectory()) {
if (!files[i].exists())
break;
Bitmap frame = BitmapFactory.decodeFile(files[i]
.getAbsolutePath());
Log.e("Path ",files[i]
.getAbsolutePath());
se.encodeNativeFrame(fromBitmap(Bitmap.createScaledBitmap(frame, 1300, 800, false)));
try {
Thread.sleep(1000);
} catch (Exception e) {
e.printStackTrace();
}
}
}
se.finish();
Log.e("Test ","Finish");
} catch (IOException e) {
Log.e("TAG", "IO", e);
}
}
和build.gradle
compile 'org.jcodec:jcodec-android:0.1.9'
我尝试了什么
private void createFinalVideo() {
String TAG = "AUDIO_TRACK";
String outputFile = "";
try {
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "final.mp4");
file.createNewFile();
outputFile = file.getAbsolutePath();
MediaExtractor videoExtractor = new MediaExtractor();
videoExtractor.setDataSource(Environment.getExternalStorageDirectory()
+ File.separator + "testvideo.mp4");
// videoExtractor.setDataSource(affd.getFileDescriptor(), affd.getStartOffset(), affd.getLength());
MediaExtractor audioExtractor = new MediaExtractor();
final AssetFileDescriptor afd = this.getAssets().openFd("audio.m4a");
audioExtractor.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
final AssetFileDescriptor afdd = this.getAssets().openFd("audio.m4a");
// audioExtractor.setDataSource(Environment.getExternalStorageDirectory() + File.separator + "test_audio.ogg");
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;
audioBufferInfo.offset = offset;
videoBufferInfo.size = videoExtractor.readSampleData(videoBuf, offset);
audioBufferInfo.size = audioExtractor.readSampleData(audioBuf, offset);
if (videoBufferInfo.size < 0 || audioBufferInfo.size < 0) {
Log.d(TAG, "saw input EOS.");
sawEOS = true;
videoBufferInfo.size = 0;
audioBufferInfo.size = 0;
} else {
videoBufferInfo.presentationTimeUs = videoExtractor.getSampleTime();
videoBufferInfo.flags = videoExtractor.getSampleFlags();
muxer.writeSampleData(videoTrack, videoBuf, videoBufferInfo);
videoExtractor.advance();
audioBufferInfo.presentationTimeUs = audioExtractor.getSampleTime();
audioBufferInfo.flags = audioExtractor.getSampleFlags();
muxer.writeSampleData(audioTrack, audioBuf, audioBufferInfo);
audioExtractor.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);
}
}
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());
}
return;
}
使用上面的代码输出文件已创建，但未添加音轨。帮我为视频添加背景音频。所有建议将不胜感激。
答案 0 :(得分：0)
以下是带音频的带视频的代码示例
private void muxing(String videopath, String output_path) {
String outputFile = "";
try {
File file = new File(output_path);
file.createNewFile();
outputFile = file.getAbsolutePath();
MediaExtractor videoExtractor = new MediaExtractor();
// AssetFileDescriptor afdd = getAssets().openFd("test.3gp");
videoExtractor.setDataSource(videopath);
MediaExtractor audioExtractor = new MediaExtractor();
/*audioExtractor.setDataSource(Environment.getExternalStorageDirectory() + File.separator + "theme.aac");*/
final AssetFileDescriptor afd = getActivity().getAssets().openFd("themes.aac");
audioExtractor.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
Log.d("test", "Video Extractor Track Count " + videoExtractor.getTrackCount());
Log.d("test", "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("test", "Video Format " + videoFormat.toString());
Log.d("test", "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("test", "saw input EOS.");
sawEOS = true;
videoBufferInfo.size = 0;
} else {
videoBufferInfo.presentationTimeUs = videoExtractor.getSampleTime();
videoBufferInfo.flags = videoExtractor.getSampleFlags();
// videoBufferInfo.flags =MediaCodec.BUFFER_FLAG_SYNC_FRAME;
muxer.writeSampleData(videoTrack, videoBuf, videoBufferInfo);
videoExtractor.advance();
frameCount++;
Log.d("test", "Frame (" + frameCount + ") Video PresentationTimeUs:" + videoBufferInfo.presentationTimeUs + " Flags:" + videoBufferInfo.flags + " Size(KB) " + videoBufferInfo.size / 1024);
Log.d("test", "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("test", "saw input EOS.");
sawEOS2 = true;
audioBufferInfo.size = 0;
} else {
// audioBufferInfo.presentationTimeUs = audioExtractor.getSampleTime();
audioBufferInfo.presentationTimeUs = 30;
audioBufferInfo.flags = audioExtractor.getSampleFlags();
muxer.writeSampleData(audioTrack, audioBuf, audioBufferInfo);
audioExtractor.advance();
Log.d("test", "Frame (" + frameCount + ") Video PresentationTimeUs:" + videoBufferInfo.presentationTimeUs + " Flags:" + videoBufferInfo.flags + " Size(KB) " + videoBufferInfo.size / 1024);
Log.d("test", "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();
if (new File(videopath).exists()) {
new File(videopath).delete();
}
} catch (IOException e) {
Log.d("test", "Mixer Error 1 " + e.getMessage());
} catch (Exception e) {
Log.d("test", "Mixer Error 2 " + e.getMessage());
}
}
答案 1 :(得分：0)
此代码用于将一系列图像转换为视频文件。
padding-bottom:78px;