Android Camera2 API银河S7 [英] Android camera2 api galaxy s7

问题描述

我正在编写一个应用程序，该应用程序记录来自手机的视频并将其上传到服务器.在除Galaxy S7之外的任何设备上均可正常运行.在Galaxy S7上，录制会生成一个仅包含音频的视频文件，而没有视频或一个视频帧.这在手机上创建的临时文件中确实如此，而不仅仅是上传到服务器上的一个临时文件. 我正在使用Camera2 API，并且已经尝试使用前置和后置摄像头.

I am writing an app which records video from the phone and uploads it to a server. Works fine on any device except Galaxy S7. On the Galaxy S7 recording produces a video file with audio only and either no video or one video frame. This is true in the temporary file created on the phone and not just the one uploaded to the server. I am using the Camera2 API, and I have tried with the front and back cameras.

我尝试使用我的代码和以下两个示例应用程序: 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

I have tried with my code, and these two example applications: 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

产生的视频文件似乎正常，这是编解码器信息: 流0 类型:视频 编解码器:H264-MPEG-4 AVC(第10部分)(avc1) 英语语言 分辨率:960x720 显示分辨率:960x720 帧频:29.055091

The video file produced appears to be ok, here is the codec info: Stream 0 Type: Video Codec: H264 - MPEG-4 AVC (part 10) (avc1) Language: English Resolution: 960x720 Display resolution: 960x720 Frame rate: 29.055091

流1 类型:音频 编解码器:MPEG AAC音频(mp4a) 英语语言 频道:立体声 采样率:16000 Hz

Stream 1 Type: Audio Codec: MPEG AAC Audio (mp4a) Language: English Channels: Stereo Sample rate: 16000 Hz

推荐答案

工作几天后，我找到了答案.

After several days of work I found the answer.

三星Galaxy S7(我认为是S6)有一个错误，使编码混乱. 解决方法是使用以下功能重新编码.

The Samsung Galaxy S7 (and S6 I think) has a bug which messes up the encoding. The fix is to reencode using the function below.

请注意，在gradle中需要此依赖项: 编译'com.googlecode.mp4parser:isoparser:1.1.22'

Note that you need this dependency in your gradle: compile '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");
    }
}

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