how to use libavcodec/ffmpeg to find duration of video file

user_731433 0
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I needed a library to perform basic functions such as length, size, etc of a video file (i'm guessing through the metadata or tags) so I chose ffmpeg. Valid video formats are primarily those prevalent in movie files viz. wmv, wmvhd, avi, mpeg, mpeg-4, etc. If you can, please help me with the method(s) to be used for knowing the duration the video file. I'm on a Linux platform.

ffmpeg c++
4 Answers

used this function its working : 

extern "C"
JNIEXPORT jint JNICALL
Java_com_ffmpegjni_videoprocessinglibrary_VideoProcessing_getDuration(JNIEnv *env,
                                                                      jobject instance,
                                                                      jstring input_) {
    av_register_all();
    AVFormatContext *pFormatCtx = NULL;
    if (avformat_open_input(&pFormatCtx, jStr2str(env, input_), NULL, NULL) < 0) {
        throwException(env, "Could not open input file");
        return 0;
    }


    if (avformat_find_stream_info(pFormatCtx, NULL) < 0) {
        throwException(env, "Failed to retrieve input stream information");
        return 0;
    }

    int64_t duration = pFormatCtx->duration;

    avformat_close_input(&pFormatCtx);
    avformat_free_context(pFormatCtx);
    return (jint) (duration / AV_TIME_BASE);
}

When I m using (jint) (duration / AV_TIME_BASE) this video duration is getting wrong.

user_101656200
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