Question

我似乎无法弄清楚如何在45秒的时间内提取音频30秒，并且淡入和淡出2秒。这就是我所拥有的，但我无法让它发挥作用。

ffmpeg -y -i $ORIGINAL -ab 64 $STREAM
ffmpeg -y -i $STREAM -ss 00:00:45 -t 00:00:30 $CLIP
ffmpeg -y -i $CLIP -af "afade=t=in:ss=0:d=2,afade=t=out:st=28:d=2" $CLIP

（$ STREAM文件应该与$ CLIP文件不同）

我最终得到的是一个2秒的剪辑。

非常感谢帮助。

Answer 1

如果您的第三个命令表明输出文件与您的输入文件相同，那么您的问题就出现了。 FFmpeg不进行就地编辑。输出文件必须不同。

无论如何，你可以一气呵成，避免世代损失

import time
print ("Hello!")
time.sleep(1)
print ("Welcome to the Username and Password python test!")
time.sleep(3)
Username = input ("Please enter your desired Username ")
time.sleep(1)
print ("Your username is "+ Username)
time.sleep(1)
Q1 = input ("Is this correct? 'Y' or 'N' ")
if Q1 == "N":
    Q2 = input ("Would you like to change it? ")
    if Q2 == "Y": Username = input ("Please re enter your Username ")
    print ("Your Username is now "+ Username)
    time.sleep(2)
    print ("You cannot change your Username now")
    time.sleep(2)
if Q1 == "Y": time.sleep(1)
Password = input ("Please input your Password ")
time.sleep(3)
Q3 = input ("Please enter your Username ")
if Q3 == Username:
    time.sleep(1)
    Q4 = input ("Please now input your Password ")
    time.sleep(1)
    if Q4 == Password:
        print ("Correct")
        time.sleep(2)
        print ("Thank you for using the Username and Password python test")
    else:
        print ("Incorrect Password")
else:
    print ("Username not found")

FFMPEG提取剪辑和淡入淡出

1 个答案: