从无线 IP 摄像机到 Android 手机的实时视频流

Question

在这里，我必须使用 RTSP 协议将实时视频流从无线网络摄像机传输到 android 手机。摄像机连接到无线路由器，手机也有相同的 wifi 网络。现在我需要从摄像机实现实时视频流。

为此，我应该怎么做？这对我来说是新概念。如何以编程方式连接 android 手机和相机并获得直播。任何帮助将不胜感激。

Answer 1

你可以从你的网络摄像机访问图像实时源到你的电脑，我的是

String URL = "http://192.168.1.8/image/jpeg.cgi";

或某种。如果包含，您应该检查您的设备。然后，您可以下载图像并将其放在 imageview 上。不是实际的图像文件，只是它的图形细节。您可以搜索 MJpegInputStream ，这是它的示例代码

public class MjpegInputStream extends DataInputStream {
private final byte[] SOI_MARKER = { (byte) 0xFF, (byte) 0xD8 };
private final byte[] EOF_MARKER = { (byte) 0xFF, (byte) 0xD9 };
private final String CONTENT_LENGTH = "Content-Length";
private final static int HEADER_MAX_LENGTH = 100;
private final static int FRAME_MAX_LENGTH = 40000 + HEADER_MAX_LENGTH;
private int mContentLength = -1;

public static MjpegInputStream read(Context context,String url) {
    HttpResponse res;
    MyHttpClient httpclient = new MyHttpClient( context );     
    try {
        res = httpclient.execute(new HttpGet(URI.create(url)));
        return new MjpegInputStream(res.getEntity().getContent());              
    } catch (ClientProtocolException e) {
    } catch (IOException e) {}
    return null;
}

public MjpegInputStream(InputStream in) { super(new BufferedInputStream(in, FRAME_MAX_LENGTH)); }

private int getEndOfSeqeunce(DataInputStream in, byte[] sequence) throws IOException {
    int seqIndex = 0;
    byte c;
    for(int i=0; i < FRAME_MAX_LENGTH; i++) {
        c = (byte) in.readUnsignedByte();
        if(c == sequence[seqIndex]) {
            seqIndex++;
            if(seqIndex == sequence.length) return i + 1;
        } else seqIndex = 0;
    }
    return -1;
}

private int getStartOfSequence(DataInputStream in, byte[] sequence) throws IOException {
    int end = getEndOfSeqeunce(in, sequence);
    return (end < 0) ? (-1) : (end - sequence.length);
}

private int parseContentLength(byte[] headerBytes) throws IOException, NumberFormatException {
    ByteArrayInputStream headerIn = new ByteArrayInputStream(headerBytes);
    Properties props = new Properties();
    props.load(headerIn);
    return Integer.parseInt(props.getProperty(CONTENT_LENGTH));
}   

public Bitmap readMjpegFrame() throws IOException {
    mark(FRAME_MAX_LENGTH);
    int headerLen = getStartOfSequence(this, SOI_MARKER);
    reset();
    byte[] header = new byte[headerLen];
    readFully(header);
    try {
        mContentLength = parseContentLength(header);
    } catch (NumberFormatException nfe) { 
        mContentLength = getEndOfSeqeunce(this, EOF_MARKER); 
    }
    reset();
    byte[] frameData = new byte[mContentLength];
    skipBytes(headerLen);
    readFully(frameData);
    return BitmapFactory.decodeStream(new ByteArrayInputStream(frameData));
}

您可以查看有关 MJpegInput 流 here 和 here 的更多信息

希望它有用、快乐的编码。