VLC coding and display - c

Question

I'm using libvlc to display the video stream after capturing the ts fragments exposed by m3u8 index files. I have never used libvlc before. According some tutorials, the following lines:
libvlc_instance_t* inst;
libvlc_media_player_t* mp;
libvlc_media_t* m;
inst=libvlc_new(0,NULL);
m=libvlc_media_new_path(inst,"...");
mp=libvlc_media_player_new_from_media(m);
libvlc_media_release(m);
//For windows. binding the displaying window.
libvlc_media_player_set_hwnd(mp,hwnd);
libvlc_media_player_play(mp);
Sleep(3000);
libvlc_media_player_stop(mp);
libvlc_media_player_release(mp);
libvlc_release(inst);
It seems you just need to call few functions and set some parameters for some initialization and then binding the window to display the video resource, libvlc should know how to do the coding and decoding works and display the stream. After all of those works done, release the resource. Sound pretty convenient.
After following those codes, the window just flickered once and exited. I don't know why yet.
My code is something like this:
int test(HWND hwnd)
{
//const char* version=libvlc_get_version();
//const char* compiler=libvlc_get_compiler();
//const char* changeset=libvlc_get_changeset();
//printf("Libvlc.\n");
//printf("Version:%s\n",version);
//printf("Compiler:%s\n",compiler);
//printf("Changeset:%s\n",changeset);
libvlc_instance_t* inst;
libvlc_media_player_t* mp;
libvlc_media_t* m;
inst=libvlc_new(0,NULL);
m=libvlc_media_new_path(inst,"my video resource file path...");
mp=libvlc_media_player_new_from_media(m);
libvlc_media_release(m);
//For windows. binding the displaying window.
libvlc_media_player_set_hwnd(mp,hwnd);
libvlc_media_player_play(mp);
Sleep(3000);
libvlc_media_player_stop(mp);
libvlc_media_player_release(mp);
libvlc_release(inst);
return 0;
}
int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hprevinstance, PSTR szcmdLine, int icmdshow)
{
HWND hwnd=NULL;
InitCommonControls();
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
if(Frame_Register(hinstance)!=0) {
MessageBox(NULL,"window register failed","Sorry",MB_OK|MB_ICONERROR);
return 0;
}
if(NULL==(hwnd=Frame_Create(hinstance,1200,600))) return 0;
Frame_Test(hwnd);
return Frame_Run(hwnd);
}
int regist_window(char* class_name,HINSTANCE instance,WNDPROC proc)
{
WNDCLASSEX wndclass;
wndclass.cbSize=sizeof(wndclass);
wndclass.style = CS_DBLCLKS|CS_HREDRAW|CS_VREDRAW;
wndclass.lpfnWndProc = proc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = instance;
wndclass.hIcon = NULL;
wndclass.hCursor = LoadCursor(NULL,IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)CreateSolidBrush(RGB(0,0,0));
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = class_name;
wndclass.hIconSm = NULL;
if(!RegisterClassEx(&wndclass)) return -1;
return 0;
}
HWND Frame_Create(HINSTANCE instance,int width,int height)
{
int cx,cy;
POINT pt;
cx=GetSystemMetrics(SM_CXSCREEN);
cy=GetSystemMetrics(SM_CYSCREEN);
pt.x=(cx-width)>>1;
pt.y=(cy-height)>>1;
HWND hwnd=CreateWindowEx(NULL,
WINDOW_CLASS_NAME,
"Docker Frame Capture",
WS_OVERLAPPEDWINDOW|WS_VISIBLE|WS_HSCROLL|WS_CLIPCHILDREN,
pt.x,pt.y,width,height,NULL,
(HMENU)NULL,
instance,NULL);
// Some owner-drawing and data referring to the customized window.
Frame_InitialSettings(hwnd);
return hwnd;
}
int Frame_Run(HWND frame)
{
MSG msg;
while(GetMessage(&msg,NULL,0,0)) {
if(!IsDialogMessage(frame,&msg)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
GdiplusShutdown(gdiplusToken);
return(msg.wParam);
}
int Frame_Test(HWND hwnd)
{
//create a child window , as a container for vlc player.
RECT rc;
GetClientRect(hwnd,&rc);
int width=rc.right-rc.left,height=rc.bottom-rc.top;
HWND vlc_hwnd=CreateWindowEx(NULL,
WC_STATIC,
"",
WS_CHILD|WS_VISIBLE,
0,0,width,height,hwnd,
(HMENU)NULL,//LoadMenu(instance,"IDR_FRMENU"),
(HINSTANCE)GetWindowLongPtr(hwnd,GWLP_HINSTANCE),NULL);
test(vlc_hwnd);
return 0;
}
New addings:
the function libvlc_new return null, libvlc_errmsg() return null string.
Modified 7th July:
Problem figured out, You must copy the plugsin folder of libvlc to your project.