預滾動
PREROLL The time (usually in seconds) it takes a videotape to get up to speed, i.e. 緩沖時間(preroll)實際是在動畫回放前將動畫和音頻調(diào)入用戶緩沖區(qū)所需的一段時間。
PREROLL The time (usually in seconds) it takes a videotape to get up to speed, i.e., the lapse time between pressing the play button and when the picture appears>2 緩沖時間(preroll)實際是在動畫回放前將動畫和音頻調(diào)入用戶緩沖區(qū)所需的一段時間。緩沖時間越長,支持的數(shù)據(jù)傳輸速率就越高,因為更多的信息已經(jīng)輸入到客戶機的緩沖區(qū)中。
preroll sequencer 預轉(zhuǎn)定序器