jcodec - a pure java implementation of video/audio codecs.

About

JCodec is a library implementing a set of popular video and audio codecs. Currently JCodec supports:

• Video

  • H.264 Main profile decoder ( CAVLC/CABAC, I/P/B frames );
  • H.264 Baseline profile encoder ( CAVLC, I-frame only );
  • MPEG 1/2 decoder ( I/P/B frames, interlace );
  • Apple ProRes decoder;
  • Apple ProRes encoder;
  • JPEG decoder;

• Audio

  • SMPTE 302M decoder;

• Wrappers ( muxers, demuxers, formats ):

  • MP4 ( ISO BMF, Apple QuickTime ) de-muxer;
  • MP4 ( ISO BMF, Apple QuickTime ) muxer;
  • MKV ( Matroska ) de-muxer;
  • MKV ( Matroska ) muxer;
  • MPEG PS ( Program Stream ) demuxer;
  • MPEG TS ( Transport Stream ) demuxer;

JCodec also features a pure java video player that works as a web-browser applet. The player uses a specially developed streaming technology 'JCodec Streaming'.

JCodec is free software distributed under FreeBSD License.

Future development

Those are just some of the things JCodec dev team is planning to work on during the next year:

• Video
  • Improve H.264 encoder: add P frames, CABAC, rate control;
  • Performance optimize H.264 decoder;
  • J2K decoder;
  • Support high profiles in H.264;
• Audio
  • MP3 decoder;
  • MP3 encoder;
  • AAC encoder;
• Wrappers
  • MXF demuxer;
• Player
  • H.264 support, GOP support, stability, remove signing, JAAD integration;

Getting started

You can get JCodec automatically with maven. For this just add below snippet to your pom.xml .

<dependency>
    <groupId>org.jcodec</groupId>
    <artifactId>jcodec</artifactId>
    <version>0.1.5</version>
</dependency>

OR download it from here:

• JCodec 0.1.5 JAR, GPG Sign, POM

There is virtually no documentation right now but the plan is to catch up on this so stay tuned.

Sample code

Getting a single frame from a movie ( supports only AVC, H.264 in MP4, ISO BMF, Quicktime container ):

    int frameNumber = 150;
	BufferedImage frame = FrameGrab.getFrame(new File("filename.mp4"), frameNumber);
    ImageIO.write(frame, "png", new File("frame_150.png"));

Getting a sequence of frames from a movie ( supports only AVC, H.264 in MP4, ISO BMF, Quicktime container ):

    double startSec = 51.632;
	FrameGrab grab = new FrameGrab(new File("filename.mp4"));
	grab.seek(startSec);
    for (int i = 0; i < 100; i++) {
        ImageIO.write(grab.getFrame(), "png",
                new File(System.getProperty("user.home"), String.format("Desktop/frame_%08d.png", i)));
    }

Contact

Feel free to communicate any questions or concerns to us. Dev team email: jcodecproject@gmail.com