Problem with SDL Display

[medha]

HI All,
I am using JM Player H264 softcodec and i want to display the decoded frames.
For displaying, i am using SDL library...
As JM Player gives the output in YUV format, i am using the APIs of SDL as follows..

if (SDL_Init(SDL_INIT_VIDEO) != 0)
{
printf("Unable to initialize SDL: %s\n", SDL_GetError());
}

screen = SDL_SetVideoMode(640, 480, 0, SDL_SWSURFACE );

if (screen == NULL)
{
printf("Unable to set video mode: %s\n", SDL_GetError());
}

if(screen != NULL)
{

pOverlay = SDL_CreateYUVOverlay(img->width, img->height, SDL_YV12_OVERLAY, screen);

rect.w = 640;

rect.h = 480;

SDL_LockYUVOverlay(pOverlay);

memcpy(pOverlay->pixels[0], recfr.yptr, (img->height* img->width));

memcpy(pOverlay->pixels[1], recfr.uptr, (img->height*img->width/4));

memcpy(pOverlay->pixels[2], recfr.vptr, (img->height*img->width/4));

}

if( (SDL_DisplayYUVOverlay(pOverlay, &rect) ) != 0)
{
printf("Unable to initialize SDL: %s\n", SDL_GetError());
}

SDL_UnlockYUVOverlay(pOverlay);
SDL_FreeYUVOverlay(pOverlay);
But the display is full of green lines and mirror image is also coming..
Please let me know, how can i solve this..

Thanks and Regards,
Medha