MCI QUESTION!!! Is it different file extension name and codec?

[AmissU]

Hello. I'm trouble in MCI T-T this is my video spec.

General
Complete name : C:\Users\Administrator\Desktop\abdd\abc.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 5.66 MiB
Duration : 1mn 22s
Overall bit rate : 577 Kbps
Writing application : Lavf53.32.100

Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.0
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=3
Codec ID : H264
Duration : 1mn 22s
Bit rate : 575 Kbps
Width : 320 pixels
Height : 240 pixels
Display aspect ratio : 4:3
Frame rate : 12.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.623
Stream size : 5.63 MiB (100%)

when I open this video. originally my code is...

MCI_ANIM_OPEN_PARMS *mciOpen = new MCI_ANIM_OPEN_PARMS;
mciOpen->lpstrDeviceType = _T("AVIVideo"); //장치 타입 설정

but It doesn't work. This file extension name is .avi. so I thought this lpstrDevicetype is also Avi. but It has matter. so now my changed code is...

MCI_ANIM_OPEN_PARMS *mciOpen = new MCI_ANIM_OPEN_PARMS;
mciOpen->lpstrDeviceType = _T("MPEGVideo");

It work!!! 1. Is it different file extension name and codec(for lpstrDeviceType) ? 2. I think my codec is lavf53.32.100 in ffmpeg, doesn't it? so how to put code lpstrDeviceType ? MPEGVideo2, MPEGVideo4, MPEGVideo, FFMPEG?? I can't choose the lpstrDeviceType. help me plz!