[問題] SDL Raw Video Player

看板C_and_CPP (C/C++)作者puper (Oh Yes)時間15年前 (2010/07/26 13:56)推噓1(1推 0噓 8→)

留言9則, 3人參與討論串1/1

我目前是依這個文件的說明去做的 http://www.webkinesia.com/games/rawvideo.php 程式碼和他的一模一樣，也沒有任何的error，「Playing video successful!」這個訊息有出現執行的結果是，有視窗跳出來，但是確是一片黑黑的，沒有任何的畫面。目前我懷疑是"sample_video.raw"，這個檔案，我用一般的player 都沒有辦法播放請問要怎麼樣才可以有正常播放的畫面出來呢？ code 如下.. int main( int argc, char* args[] ) { SDL_Surface *screen; FILE *fp; char *buf; int n; printf("\nhello \n"); //hard-code file name and parameters just for demo purposes if ( ( fp = fopen ( "sample_video.raw", "rb" ) ) == NULL ) { printf("\nError opening file \n"); exit ( 0 ); } //allocate memory to hold one frame of data n = 320 * 240 * 3; buf = ( char *) malloc ( n ); assert ( buf ); //make sure memory has been allocated successfully //initialize video system if ( SDL_Init( SDL_INIT_VIDEO ) < 0 ) { fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError()); exit(1); } //ensure SDL_Quit is called when the program exits atexit(SDL_Quit); //set video mode of 320 x 240 with 24-bit pixels screen = SDL_SetVideoMode( 320, 240, 24, SDL_SWSURFACE); if ( screen == NULL ) { fprintf(stderr, "Unable to set 320x240 video: %s\n", SDL_GetError()); exit(1); } screen->pixels = buf; //point framebuffer to data buffer while ( 1 ) { //read data ( one frame of n bytes ) into buffer if ( fread ( buf, 1, n, fp ) <= 0 ) break; SDL_Delay ( 50 ); //50 ms per frame SDL_UpdateRect ( screen, 0, 0, 0, 0 ); //blit data to screen } fclose ( fp ); SDL_Delay ( 2000 ); //delay 2 seconds before exit printf("Playing video successful!\n"); return 0; } -- 真相在此 http://puperchang.myec.tw/wordpress/ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.20.164.107