cannot set frame rate for preview?

翻译set the frame rate to 30fps this graph cannot preview 英语翻译This graph cannot preview this grarh cannot preview是什么意思? this gragh cannot preview properly什么意思 打开摄像头出现This graph cannot preview! THIS GRAPH CANNOT PREVIEW什么意思 set rate 什么意思? This graph cannot preview 那要怎么办呢? 英语翻译Image Quality or Frame Rate?When transmitting a complete .In this case,the frame rate is equal to the sample rate,and Frame