玩JavaCV和FFmpeg的视频 [英] Playing a video with JavaCV and FFmpeg

问题描述

所以，我正在开发一个定制的视频播放器Android版，但我需要多打了Android支持的视频文件（MP4，3GP ......），如对WMV，AVI，FLV。

在这个时候我已经转换任何视频类型的MP4，我能重新编码后打他们，但我不知道我怎么可以玩这些WMV，AVI文件，而无需重新编码它们的MP4。

有没有什么办法可以发挥在Android上任何视频而无需重新编写呢？ JavaCV + FFmpeg的库已经工作，只是不知道该怎么做。

通过，我使用重新code视频的方式，继承人的code：

 公共静态无效的转换（档案文件）{

    FFmpegFrameGrabber采集卡=
            新FFmpegFrameGrabber（file.getAbsolutePath（））;

    IplImage的captured_frame = NULL;

    FrameRecorder记录= NULL;
    记录=新FFmpegFrameRecorder（到/ mnt / SD卡/ external_sd / videosteste / primeiroteste.mp4，300，300）;
    recorder.setVideo codeC（13）;
    recorder.setFrameRate（30）;
    recorder.setFormat（MP4）;
    尝试 {
        recorder.start（）;
        frameGrabber.start（）;
        而（真）{
            尝试 {
                captured_frame = frameGrabber.grab（）;

                如果（captured_frame == NULL）{
                    的System.out.println（!!!失败cvQueryFrame）;
                    打破;
                }
                recorder.record（captured_frame）;
            }赶上（例外五）{
            }
        }
        recorder.stop（）;
        recorder.release（）;
    }赶上（例外五）{
        e.printStackTrace（）;
    }
}
 

解决方案

首先创建CanvasFrame然后使用canvas.showImage（captured_frame）;代替recorder.record（captured_frame）;

下面是code：

 公共类GrabberShow实现Runnable
{
    最终静态INT间隔= 40; ///你可以使用间隔
    IplImage的形象;
    静态CanvasFrame帆布=新CanvasFrame（JavaCV播放器）;


    公共GrabberShow（）
   {
        canvas.setDefaultCloseOperation（javax.swing.JFrame.EXIT_ON_CLOSE）;
   }


    公共静态无效的转换（档案文件）
    {

    FFmpegFrameGrabber采集卡=新FFmpegFrameGrabber（file.getAbsolutePath（））;

    IplImage的captured_frame = NULL;

    FrameRecorder记录= NULL;
    //记录=新FFmpegFrameRecorder（到/ mnt / SD卡/ external_sd / videosteste / primeiroteste.mp4，300，300）;
    录音机=新FFmpegFrameRecorder（D：//temp.mp4，300，300）;
    recorder.setVideo codeC（13）;
    recorder.setFrameRate（30）;
    recorder.setFormat（MP4）;
    尝试 {
        recorder.start（）;
        frameGrabber.start（）;
        而（真）{
            尝试 {
                captured_frame = frameGrabber.grab（）;

                如果（captured_frame == NULL）{
                    的System.out.println（!!!失败cvQueryFrame）;
                    打破;
                }
                //recorder.record(captured_frame）;
                canvas.showImage（captured_frame）;
                视频下载（间隔）;
            }赶上（例外五）{
            }
        }
        recorder.stop（）;
        recorder.release（）;
    }赶上（例外五）{
        e.printStackTrace（）;
    }
}
@覆盖
公共无效的run（）
{
    转换（新文件（D：//aes.mp4））;
}

公共静态无效的主要（字串[] args）{
    GrabberShow GS =新GrabberShow（）;
    主题日=新主题（GS）;
    th.start（）;
}
}
 

So, I'm developing a custom video player for Android but I need to play more than the android supported video files (mp4, 3gp...), like wmv, avi, flv.

At this time I do already convert any video type to .mp4 and I'm able to play them after recoding, but I have no idea how can I play those wmv, avi files without recoding them to mp4.

Is there any way I can play any video on Android without recoding them? JavaCV + FFmpeg library already working, just don't know how to do that.

By the way, heres the code that I'm using to recode videos:

public static void convert(File file) {

    FFmpegFrameGrabber frameGrabber =
            new FFmpegFrameGrabber(file.getAbsolutePath());

    IplImage captured_frame = null;

    FrameRecorder recorder = null;
    recorder = new FFmpegFrameRecorder("/mnt/sdcard/external_sd/videosteste/primeiroteste.mp4", 300, 300);
    recorder.setVideoCodec(13);
    recorder.setFrameRate(30);
    recorder.setFormat("mp4");
    try {
        recorder.start();
        frameGrabber.start();
        while (true) {
            try {
                captured_frame = frameGrabber.grab();

                if (captured_frame == null) {
                    System.out.println("!!! Failed cvQueryFrame");
                    break;
                }
                recorder.record(captured_frame);
            } catch (Exception e) {
            }
        }
        recorder.stop();
        recorder.release();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

解决方案

first you create the CanvasFrame then use "canvas.showImage(captured_frame);" instead of "recorder.record(captured_frame);"

Here is the code:

public class GrabberShow implements Runnable 
{
    final static int INTERVAL=40;///you may use interval
    IplImage image;
    static CanvasFrame canvas = new CanvasFrame("JavaCV player");


    public GrabberShow() 
   {
        canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
   }


    public static void convert(File file) 
    {

    FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(file.getAbsolutePath());

    IplImage captured_frame = null;

    FrameRecorder recorder = null;
    //recorder = new FFmpegFrameRecorder("/mnt/sdcard/external_sd/videosteste/primeiroteste.mp4", 300, 300);
    recorder = new FFmpegFrameRecorder("D://temp.mp4", 300, 300);
    recorder.setVideoCodec(13);
    recorder.setFrameRate(30);
    recorder.setFormat("mp4");
    try {
        recorder.start();
        frameGrabber.start();
        while (true) {
            try {
                captured_frame = frameGrabber.grab();

                if (captured_frame == null) {
                    System.out.println("!!! Failed cvQueryFrame");
                    break;
                }
                //recorder.record(captured_frame);
                canvas.showImage(captured_frame);
                Thread.sleep(INTERVAL);
            } catch (Exception e) {
            }
        }
        recorder.stop();
        recorder.release();
    } catch (Exception e) {
        e.printStackTrace();
    }
}
@Override
public void run() 
{
    convert(new File("D://aes.mp4")); 
}

public static void main(String[] args) {
    GrabberShow gs = new GrabberShow();
    Thread th = new Thread(gs);
    th.start();
}
}

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