我在对一个AVI文件进行AVI-〉MPEG2编码时出现了问题，命令行如下：
mencoder.exe "源文件.Xvid.AC3.avi" -of mpeg -mpegopts format=dvd:telecine -vf-add scale=720:480,harddup -ofps 24000/1001 -ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=2000:trell:mbd=2:keyint=15:aspect=16/9:vrc_buf_size=1835:vrc_maxrate=9800:vpass=1 -nosound -endpos 10 -o NUL: 2> 2.txt
mencoder.exe "源文件.Xvid.AC3.avi.avi" -of mpeg -mpegopts format=dvd:telecine -vf-add scale=720:480,harddup -ofps 24000/1001 -ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=2000:trell:mbd=2:keyint=15:aspect=16/9:vrc_buf_size=1835:vrc_maxrate=9800:vpass=2 -nosound -endpos 10 -o "D:\[游戏终结].End.Game.2006.XviD.AC3.iNT.Rerip.CD1-MoMo.mpeg2.mpg" 2>> 2.txt
在进行1Pass时出现了如下提示：
Limiting audio preload to 0.4s.
Increasing audio density to 4.
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: BICUBIC scaler, from 0x32315659 (21VY) to 0x32315659 (21VY) using MMX2
SwScaler: using 4-tap MMX scaler for horizontal luminance scaling
SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling
SwScaler: using n-tap MMX scaler for vertical scaling (YV12 like)
SwScaler: 640x352 -> 720x480
1 duplicate frame(s)!
而在2Pass时却出现如下报错提示，不能顺利编码：
Limiting audio preload to 0.4s.
Increasing audio density to 4.
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: reducing / aligning filtersize 5 -> 4
SwScaler: BICUBIC scaler, from 0x32315659 (21VY) to 0x32315659 (21VY) using MMX2
SwScaler: using 4-tap MMX scaler for horizontal luminance scaling
SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling
SwScaler: using n-tap MMX scaler for vertical scaling (YV12 like)
SwScaler: 640x352 -> 720x480
[mpeg2video @ 00BF0F10]Error: 2pass curve failed to converge
Could not open codec.
FATAL: Cannot initialize video driver.
我使用的Mencoder是官方版本，包含了官方的Windows-all的Codec包，还有一种是官方核心+Kuree+官方Windows-all Codec包，两种方法都出现这种提示。
请高手指点我这两段命令行有什么问题？如果有，该如何修改？哪里有Mencoder的比较完整的教程或说明？
