return i-4;
return i-3;
static int mpegvideo_split(AVCodecContext *avctx,                           const uint8_t *buf, int buf_size){    int i;    uint32_t state= -1;        for(i=0; i<buf_size; i++){        state= (state<<8) | buf[i];        if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)            return i-4;    }    return 0;}