VLC SDK在VS2010中的配置及簡單使用舉例

1.        從http://www.videolan.org/vlc/download-windows.html下載vlc-2.2.0-win32.7z，解壓縮；

2.        新建一個VLCtest控制檯工程；

3.        將/vlc-2.2.0-win32/vlc-2.2.0/sdk/include添加到工程屬性中，C/C++ -->General --> Additional Include Directories；

4.        將/vlc-2.2.0-win32/vlc-2.2.0/中的libvlc.lib、libvlc.dll、libvlccore.lib、libvlccore.dll及plugins目錄拷貝到工程執行目錄下；

5.        VLCtest工程中各個文件的代碼爲：

stdafx.h:

#pragma once

#include "targetver.h"

#include <stdio.h>
#include <time.h>
#include <windows.h>

#include <vlc/vlc.h>

stdafx.cpp:

#include "stdafx.h"

#ifdef _DEBUG
    #pragma comment(lib, "../../../lib/dbg/x86_vc10/libvlc.lib")
    #pragma comment(lib, "../../../lib/dbg/x86_vc10/libvlccore.lib")
#else
    #pragma comment(lib, "../../../lib/rel/x86_vc10/libvlc.lib")
    #pragma comment(lib, "../../../lib/rel/x86_vc10/libvlccore.lib")
#endif

VLCtest.cpp:

#include "stdafx.h"
#include <iostream>

using namespace std;

void test1()
{
    libvlc_instance_t* vlc_ins    = NULL;
    libvlc_media_player_t* vlc_player = NULL;
    libvlc_media_t* vlc_media  = NULL;

    const char* vlc_args[] = {"-I", "dummy", "--ignore-config", "--extraintf=logger", "--verbose=2"};

    //創建一個VLC實例，release版本在此處會crash
    vlc_ins = libvlc_new(sizeof(vlc_args) / sizeof(vlc_args[0]), vlc_args);

    if (vlc_ins != NULL) {
        //創建一個VLC播放器
        vlc_player = libvlc_media_player_new(vlc_ins);

        if (vlc_player != NULL) {
            //通過文件路徑創建一個媒體實例
            vlc_media = libvlc_media_new_path(vlc_ins, "f:\\photo\\WP_20140405_002.mp4");

            if (vlc_media != NULL) {
                //解析媒體實例
                libvlc_media_parse(vlc_media);

                //獲取媒體文件的播放長度,返回ms
                libvlc_time_t duration = libvlc_media_get_duration(vlc_media);

                //此處是獲取媒體包含多個的視頻和音頻軌以及其它類型的軌道信息
                libvlc_media_track_info_t* media_tracks = NULL;
                int trackCount = libvlc_media_get_tracks_info(vlc_media, &media_tracks);

                //這裏是釋放內存，但我測試的時候會有問題，還沒仔細研究是爲何
                //free(media_tracks);  //crash?

                //把打開的媒體文件設置給播放器
                libvlc_media_player_set_media(vlc_player, vlc_media);

                // 因爲是windows系統，所以需要設置一個HWND給播放器作爲窗口,這裏就直接使用桌面窗口,這裏僅是測試
                libvlc_media_player_set_hwnd(vlc_player, ::GetDesktopWindow());

                //開始播放視頻
                libvlc_media_player_play(vlc_player);

                //這裏僅是爲了打印一些信息出來,20秒後退出
                time_t last_time = time(NULL);

                while ((time(NULL) < (last_time + 20))) {
                    Sleep(10);
                    //獲取當前播放位置
                    libvlc_time_t play_time = libvlc_media_player_get_time(vlc_player);
                    printf("playing time : %lld ms\r", (__int64)(play_time));

                    //獲取媒體的狀態
                    //libvlc_state_t media_state = libvlc_media_get_state(vlc_media);
                    //printf("\nmedia state : %d\n", (int)(media_state));
                }
                libvlc_media_player_stop(vlc_player);//停止
                libvlc_media_release(vlc_media);//釋放
            }
            libvlc_media_player_release(vlc_player);//釋放
        }
        libvlc_release(vlc_ins);//釋放
    }
}

void test2()
{
    libvlc_instance_t* inst;
    libvlc_media_player_t* mp;
    libvlc_media_t* m;

    //init vlc modules, should be done only once
    inst = libvlc_new(0, NULL);

    //Create a new item
    m = libvlc_media_new_path(inst, "f:\\photo\\WP_20140405_002.mp4");

    //Create a media player playing environment
    mp = libvlc_media_player_new_from_media(m);
    libvlc_media_parse(m);
    libvlc_time_t duration = libvlc_media_get_duration(m);

    //No need to keep the media now
    libvlc_media_release(m);
#if 0
    //This is a non working code that show how to hooks into a window,
    //if we have a window around
    //libvlc_drawable_t drawable = xdrawable;
    //or on windows
    void *drawable = &g_hwnd;
    libvlc_media_player_set_hwnd(mp, drawable);
#endif
    // play the media_player
    libvlc_media_player_play(mp);

    Sleep((DWORD)duration); //Let it play a bit

    //Stop playing
    libvlc_media_player_stop(mp);

    // Free the media_player
    libvlc_media_player_release(mp);
    libvlc_release(inst);
}

int main(int argc, char* argv[])
{
    //test1();
    test2();

    cout<<"ok!"<<endl;
    return 0;
}

6.    經測試，test1()和test2()在Debug模式下均能正常運行，在Release下均會crash，均是執行到libvlc_new函數處有問題，具體原因還不清楚，後面會進一步分析。

說明：在Release下，將Linker->Optimization->References中的值由Yes (/OPT:REF)修改爲No (/OPT:NOREF)，就可以在Release下執行了。

以上測試代碼來自於：

1.      http://blog.sina.com.cn/s/blog_62949ff40101edml.html 

2.      http://www.360doc.com/content/14/0309/10/2036337_358957305.shtml