Home Java javaTutorial Introduction to video processing application development in Java language

Introduction to video processing application development in Java language

Jun 10, 2023 pm 04:31 PM
java application development video processing

Introduction to Video Processing Application Development in Java Language

With the continuous development of the Internet and digital technology, video has become an indispensable part of people's lives. Whether it is short video applications or online education platforms, videos occupy an important position. Among them, video processing applications have become one of the hot topics. This article will introduce the development of video processing applications in Java language.

1. Video processing class library in Java language

As a cross-platform programming language, the power of Java language lies in its rich class library, which also includes many Video processing related class library.

  1. JMF (Java Media Framework)

JMF is a video and audio processing framework on the Java platform. On the Java 2 platform, JMF uses an architecture based on the Java Virtual Machine. It supports processing operations such as parsing and playing multimedia file formats, capturing and encoding video and audio. JMF provides APIs for embedding multimedia streams into Java applications. These APIs allow Java developers to perform audio and video processing operations in applications.

  1. JavaCV

JavaCV is a Java version of OpenCV (Open Source Computer Vision Library). It provides an interface for Java developers to access the OpenCV library, which can implement image and video processing operations in the Java language. JavaCV supports converting data between Java and C, and its underlying layer uses Java Native Interface (JNI) and JavaCPP.

  1. JCodec

JCodec is a video processing class library on the Java platform. It provides operations such as processing video files, compressing and decompressing videos, and encoding and decoding videos. The video encoding methods supported by JCodec include formats such as H.264 and VP8, and it can also support the adjustment of parameters such as bit rate, frame rate, and resolution.

2. Development of video processing applications

  1. Video transcoding

Video transcoding refers to converting one video format into another format the process of. For example, convert MP4 to AVI, or convert AVI to FLV, etc. The JCodec class library can be used on the Java platform to implement the video transcoding function. Taking converting MP4 video to FLV video as an example, the code is as follows:

public class VideoEncoder {

    public void encode MP4toFLV(String MP4FilePath, String FLVFilePath) throws Exception {
        File input = new File(MP4FilePath);
        File output = new File(FLVFilePath);

        SeekableByteChannel inputSBChannel = NIOUtils.readableFileChannel(input);
        SeekableByteChannel outputSBChannel = NIOUtils.writableFileChannel(output);

        MP4Demuxer demuxer = new MP4Demuxer(inputSBChannel);

        Transcoder transcoder = new FMJPlugin.TFMJTranscoder();

        transcoder.videoEncoderFourCC("FLV1");
        transcoder.setVideoQuality(0.6);

        MediaInfo sourceInfo = demuxer.getMediaInfo();
        Codec codec = Codec.getDecoder(sourceInfo.getVideoCodec());
        VideoDecoder vd = codec == null ? null : (VideoDecoder) codec.getDecoder(new VideoCodecMeta(sourceInfo.getVideoCodecMeta().getCodec(), sourceInfo.getVideoCodecMeta().getFourcc(), sourceInfo.getVideoCodecMeta().getTimestampScale(), sourceInfo.getVideoCodecMeta().getSize()));

        transcoder.addVideoTrack(outputSBChannel, vd, sourceInfo.getVideoFps(), 640, 480);

        Packet packet;
        long count = 0;

        while ((packet = demuxer.read(sourceInfo.getVideoTrack())) != null) {
            if (packet.isKeyFrame() && packet.isVideo()) {
                transcoder.encodeVideo(packet, outputSBChannel);
            }
            io.natty.TranscoderUtil.logProgress(++count);
        }

        transcoder.finish(outputSBChannel);
        outputSBChannel.close();
    }
}
Copy after login
  1. Video Editing

A common operation in video editing is to cut and merge videos. and cropping. On the Java platform, you can use command line tools such as FFmpeg and FFprobe to implement video editing functions, or you can use the JavaCV class library. Taking the use of JavaCV for video editing as an example, the code is as follows:

public class VideoEditor {

    public void clipVideo(String inputFilePath, String outputFilePath, int startFrame, int endFrame) throws Exception {
        FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputFilePath);
        grabber.start();

        FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFilePath, grabber.getImageWidth(), grabber.getImageHeight());
        recorder.setFormat("mp4");
        recorder.setFrameRate(grabber.getFrameRate());
        recorder.start();

        Frame frame = null;
        int frameNum = grabber.getLengthInFrames();
        int count = 0;
        while ((frame = grabber.grabFrame()) != null) {
            if (count >= startFrame && count <= endFrame) {
                recorder.record(frame);
            } else if (count > endFrame) {
                break;
            }
            count++;
        }

        grabber.stop();
        recorder.stop();
    }

    public void mergeVideo(String[] inputFilePaths, String outputFilePath) throws Exception {
        List<FFmpegFrameGrabber> grabbers = new ArrayList<>();
        long totalFrameNum = 0;

        for (String inputFilePath : inputFilePaths) {
            FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputFilePath);
            grabber.start();
            grabbers.add(grabber);
            totalFrameNum += grabber.getLengthInFrames();
        }

        FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFilePath, grabbers.get(0).getImageWidth(), grabbers.get(0).getImageHeight());
        recorder.setFrameRate(grabbers.get(0).getFrameRate());
        recorder.start();

        for (FFmpegFrameGrabber grabber : grabbers) {
            Frame frame = null;
            long count = 0;

            while ((frame = grabber.grabFrame()) != null) {
                recorder.record(frame);
                count++;
                io.natty.TranscoderUtil.logProgress(count, totalFrameNum);
            }

            grabber.stop();
        }

        recorder.stop();
    }

    public void cropVideo(String inputFilePath, String outputFilePath, int x, int y, int width, int height) throws Exception {
        FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputFilePath);
        grabber.start();

        FFmpegFrameFilter filter = new FFmpegFrameFilter("crop=" + width + ":" + height + ":" + x + ":" + y);
        filter.start();

        FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFilePath, grabber.getImageWidth(), grabber.getImageHeight());
        recorder.setFormat("mp4");
        recorder.setFrameRate(grabber.getFrameRate());
        recorder.start();

        Frame frame = null;

        while ((frame = grabber.grabFrame()) != null) {
            filter.push(frame);
            Frame filteredFrame = filter.pull();
            recorder.record(filteredFrame);
        }

        grabber.stop();
        filter.stop();
        recorder.stop();
    }
}
Copy after login

Summary

This article introduces several video processing libraries in the Java language and how to use the Java language to develop video processing applications. . The functions of video processing applications include video transcoding, video editing and other operations. The Java language provides a wealth of class libraries and tools to implement these operations. Developers can choose according to their own needs.

The above is the detailed content of Introduction to video processing application development in Java language. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Square Root in Java Square Root in Java Aug 30, 2024 pm 04:26 PM

Guide to Square Root in Java. Here we discuss how Square Root works in Java with example and its code implementation respectively.

Perfect Number in Java Perfect Number in Java Aug 30, 2024 pm 04:28 PM

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Random Number Generator in Java Random Number Generator in Java Aug 30, 2024 pm 04:27 PM

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Weka in Java Weka in Java Aug 30, 2024 pm 04:28 PM

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Armstrong Number in Java Armstrong Number in Java Aug 30, 2024 pm 04:26 PM

Guide to the Armstrong Number in Java. Here we discuss an introduction to Armstrong's number in java along with some of the code.

Smith Number in Java Smith Number in Java Aug 30, 2024 pm 04:28 PM

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

Java Spring Interview Questions Java Spring Interview Questions Aug 30, 2024 pm 04:29 PM

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Break or return from Java 8 stream forEach? Break or return from Java 8 stream forEach? Feb 07, 2025 pm 12:09 PM

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is

See all articles