我正在编写一个应用程序,从手机上录制视频,并上传到服务器。在除Galaxy S7以外的任何设备上都能正常工作。在Galaxy上,S7录制会生成一个只有音频的视频文件,没有视频或只有一个视频帧。这适用于在手机上创建的临时文件,而不仅仅是上传到服务器的临时文件。我正在使用Camera2应用程序接口,并且我已经尝试了前后摄像头。
我已经尝试过使用我的代码,下面是两个示例应用程序:https://developer.android.com/samples/Camera2Video/project.html https://github.com/googlesamples/android-Camera2Video/blob/master/Application/src/main/java/com/example/android/camera2video/Camera2VideoFragment.java
生成的视频文件看起来没有问题,以下是编解码器信息:流0类型:视频编解码器: H264 -MPEG-4avc(第10部分) (avc1)语言:英语分辨率: 960x720显示分辨率: 960x720帧率: 29.055091
流1类型:音频编解码器: MPEG AAC音频(mp4a)语言:英语频道:立体声采样率: 16000 Hz
发布于 2017-07-31 23:43:58
经过几天的工作,我找到了答案。
三星盖乐世S7 (我想还有S6 )有一个bug,会把编码搞乱。修复方法是使用下面的函数重新编码。
注意,在gradle中需要这个依赖:编译'com.googlecode.mp4parser:isoparser:1.1.22‘
public void fixSamsungBug()
{
DataSource channel = null;
try
{
channel = new FileDataSourceImpl(app.dataMgr.videoFileURL);
} catch (FileNotFoundException e)
{
e.printStackTrace();
}
IsoFile isoFile = null;
try
{
isoFile = new IsoFile(channel);
} catch (IOException e)
{
e.printStackTrace();
}
List<TrackBox> trackBoxes = isoFile.getMovieBox().getBoxes(TrackBox.class);
boolean sampleError = false;
for (TrackBox trackBox : trackBoxes) {
TimeToSampleBox.Entry firstEntry = trackBox.getMediaBox().getMediaInformationBox().getSampleTableBox().getTimeToSampleBox().getEntries().get(0);
// Detect if first sample is a problem and fix it in isoFile
// This is a hack. The audio deltas are 1024 for my files, and video deltas about 3000
// 10000 seems sufficient since for 30 fps the normal delta is about 3000
if(firstEntry.getDelta() > 10000) {
sampleError = true;
firstEntry.setDelta(3000);
}
}
if(sampleError) {
Log.d("gpinterviewandroid", "Sample error! correcting...");
Movie movie = new Movie();
for (TrackBox trackBox : trackBoxes) {
movie.addTrack(new Mp4TrackImpl(channel.toString() + "[" + trackBox.getTrackHeaderBox().getTrackId() + "]" , trackBox));
}
movie.setMatrix(isoFile.getMovieBox().getMovieHeaderBox().getMatrix());
Container out = new DefaultMp4Builder().build(movie);
//delete file first!
File file = new File(app.dataMgr.videoFileURL);
boolean deleted = file.delete();
FileChannel fc = null;
try
{
//fc = new FileOutputStream(new File(app.dataMgr.videoFileURL)).getChannel();
fc = new RandomAccessFile(app.dataMgr.videoFileURL, "rw").getChannel();
} catch (FileNotFoundException e)
{
e.printStackTrace();
}
try
{
out.writeContainer(fc);
fc.close();
} catch (IOException e)
{
e.printStackTrace();
}
Log.d("gpinterviewandroid", "Finished correcting raw video");
}
}https://stackoverflow.com/questions/45358247
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