Different length of input and output

Hello auther, I have successfully run your code with my video and gotten some output. 
I run completely according to the tutorial. However, the midi output has **313s music** is different from the length of **my input 8s**.

Is there someting wrong with it?

您好！我按照教程成功跑通您的程序了。但是我却获得了313s的音频，与我输入的8s视频不相符。
我看到模型中生成音乐的部分，cur_vlog应该代表生成的音频帧数，len_vlog代表总帧数。但最终生成的音频长度却远长于len_vlog，是否是我操作的问题导致的？