eg:   mencoder baby.wmv -ffourcc FLV1 -of lavf -ovc lavc -lavcopts
vcodec=flv:acodec=mp3:abitrate=56 -srate 22050 -oac mp3lame -o now.flv(½øÐÐת»»)

³öÏÖÁËÁдíÎó,ÓÐË­Óöµ½¹ýÀàËÆÎÊÌ⣬ָµãÖ¸µã¡£¡£¡££¬ÔÚÕâÏȶàл´ó¼ÒÁË..

MEncoder dev-SVN-r23169-4.1.2 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (Family: 15, Model: 4, Stepping: 9)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
±àÒëÓÃÁËÕë¶Ô x86 CPU µÄÀ©Õ¹Ö¸Á: MMX MMX2 SSE SSE2

³É¹¦: ¸ñʽ: 0Êý¾Ý: 0x0 - 0x500bec
¼ì²âµ½ ASF Îļþ¸ñʽ¡£
[asfheader] Audio stream found, -aid 1
[asfheader] Video stream found, -vid 2
VIDEO:  [WMV2]  480x480  24bpp  25.000 fps    0.0 kbps ( 0.0 kbyte/s)
[V] Îļþ¸ñʽ:6  fourcc:0x32564D57  ´óС:480x480  Ö¡ËÙ:25.00  ֡ʱ¼ä:=0.0400
==========================================================================
´ò¿ªÒôƵ½âÂëÆ÷: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8005->176400)
ÒÑÑ¡ÒôƵ±à½âÂëÆ÷: [ffwmav2] afm: ffmpeg (DivX audio v2 (FFmpeg))
==========================================================================
** MUXER_LAVF
*****************************************************************
If you wish to use libavformat muxing, you must ensure that your video
stream
does not contain B frames (out of order decoding) and specify:
    -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames
on the command line.
REMEMBER: MEncoder's libavformat muxing is presently broken and will
generate
INCORRECT files in the presence of B frames. Moreover, due to bugs MPlayer
will play these INCORRECT files as if nothing were wrong!
*******************************************************************************
²»Äܳõʼ»¯muxer¡£
ÕýÔÚÍ˳ö..

-- 
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URL: http://python.cn/pipermail/python-chinese/attachments/20070429/49930fb8/attachment-0001.htm 

Here is a list for python, not for linux!!

On 4/29/07, xiaoyi tian <purpen.w at gmail.com> wrote:
> eg:   mencoder baby.wmv -ffourcc FLV1 -of lavf -ovc lavc -lavcopts
> vcodec=flv:acodec=mp3:abitrate=56 -srate 22050 -oac mp3lame
> -o now.flv(进行转换)
>
> 出现了列错误,有谁遇到过类似问题，指点指点。。。，在这先多谢大家了..
>
> MEncoder dev-SVN-r23169-4.1.2 (C) 2000-2007 MPlayer Team
> CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (Family: 15, Model: 4, Stepping: 9)
> CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
> 编译用了针对 x86 CPU 的扩展指令集: MMX MMX2 SSE SSE2
>
> 成功: 格式: 0数据: 0x0 - 0x500bec
> 检测到 ASF 文件格式。
> [asfheader] Audio stream found, -aid 1
> [asfheader] Video stream found, -vid 2
> VIDEO:  [WMV2]  480x480  24bpp  25.000 fps    0.0 kbps ( 0.0 kbyte/s)
> [V] 文件格式:6  fourcc:0x32564D57  大小:480x480  帧速: 25.00  帧时间:=0.0400
> ==========================================================================
> 打开音频解码器: [ffmpeg] FFmpeg/libavcodec audio decoders
> AUDIO: 44100 Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8005->176400)
> 已选音频编解码器: [ffwmav2] afm: ffmpeg (DivX audio v2 (FFmpeg))
> ==========================================================================
> ** MUXER_LAVF
> *****************************************************************
> If you wish to use libavformat muxing, you must ensure that your video
> stream
> does not contain B frames (out of order decoding) and specify:
>     -lavfopts
> i_certify_that_my_video_stream_does_not_use_b_frames
>  on the command line.
> REMEMBER: MEncoder's libavformat muxing is presently broken and will
> generate
> INCORRECT files in the presence of B frames. Moreover, due to bugs MPlayer
> will play these INCORRECT files as if nothing were wrong!
> *******************************************************************************
> 不能初始化muxer。
> 正在退出..
>
> --
> 人生就像一个瓶子，而生活就是瓶子里的水。
> _______________________________________________
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-- 
Best Regards

Shixin Zeng