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Android Video Frame Retrieving

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  1. baris3437

    baris3437 Member This Topic's Starter

    Oct 26, 2010
    Likes Received:
    Hi everyone!

    I'm new in developing andorid apps. this semester, I'll do an app called video summarization on android platform. Unfortunately, I don't have enough knowledge to do it.

    On android platform, is this possible? İf this is possible, how can I do this?
    With my researches, I found informations below:

    On android platform, video format is .mp4 . First, we have to retrieve frames from our .mp4 file. .Mp4 files are so complicated. This can be easy with using Opencv functions. but Opencv is written in C++. So I can't use OpenCv functions in my Java codes. But this can be possible with JNA and JAVACV.
    Firstly, I set up Opencv in my computer. then I downloaded jna.jar and javacv.jar . and I imported these jars to Eclipse. I did some samples with using javacv methods. But I can't handle this. some errors occured. Here is my code:

    package den;

    import static name.audet.samuel.javacv.jna.cxcore.v21.*;
    import static name.audet.samuel.javacv.jna.cv.v21.*;
    import static name.audet.samuel.javacv.jna.highgui.v21.*;

    public class Dene {
    public static void main(String[] args) {
    IplImage image = cvLoadImage("C:\\Users\\baris\\Desktop\\1.jpg", 1);
    if (image == null) {
    System.err.println("Could not load image file.");
    } else {
    cvSmooth(image, image, CV_GAUSSIAN, 3, 0, 0, 0);
    cvSaveImage("C:\\Users\\baris\\Desktop\\2.jpg",image); // error occured in this code.

    Here is the error:
    # A fatal error has been detected by the Java Runtime Environment:
    # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x187113e0, pid=1100, tid=816
    # JRE version: 6.0_20-b02
    # Java VM: Java HotSpot(TM) Client VM (16.3-b01 mixed mode windows-x86 )
    # Problematic frame:
    # C [libhighgui200.dll+0xd13e0]
    # An error report file with more information is saved as:
    # C:\workspace_eclipse\denemee\hs_err_pid1100.log
    # If you would like to submit a bug report, please visit:
    # HotSpot Virtual Machine Error Reporting Page
    # The crash happened outside the Java Virtual Machine in native code.
    # See problematic frame for where to report the bug.

    Anyway, if the way I followed is true, I'll follow this way and fix the errors. In contrast if not, please give me the right way to handle this project.


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