[MEncoder-users] Nellymoser support in mencoder?

[Marc-Andre Lafortune]

Hi!
	I installed ffmpeg and then mencoder to do something I thought would  
be quite simple: join two flv files together. To make it simple, I'm  
trying to join one file to itself:

mencoder input.flv input.flv -o output.flv -of lavf -oac copy -ovc  
lavc -lavcopts vcodec=flv

This works perfectly for some flv files, for example the trailer demos  
that come with red5 (e.g. http://red5.googlecode.com/svn/java/example/trunk/oflaDemo/www/streams/city_of_ember.flv 
  )

But it fails for me if input.flv is some webcam recording like:
http://www.marc-andre.ca/posts/blog/webcam/test-facebook.flv

I've included the complete message including the Floating point error  
at the end. I presume the error is caused by the nellymoser codec. Is  
Nellymoser supported by mencoder ? Note that "ffmpeg -i input.flv -r  
15 output.avi" will correctly convert the my example, so ffmpeg does  
support nellymoser (and I thought that mencoder could use ffmpeg's  
library).

Help would be really appreciated

Here's the output I get:

MEncoder 1.0rc2-4.0.1 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Xeon(R) CPU            5150  @ 2.66GHz (Family: 6,  
Model: 15, Stepping: 6)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

success: format: 0  data: 0x0 - 0x45b2f
libavformat file format detected.
[flv @ 0x697160]Unsupported audio codec (6)
[flv @ 0x697160]Could not find codec parameters (Audio: 0x0006, 22050  
Hz, mono)
[lavf] Video stream found, -vid 0
[lavf] Audio stream found, -aid 1
VIDEO:  [FLV1]  240x180  0bpp  1000.000 fps    0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:44  fourcc:0x31564C46  size:240x180  fps:1000.00   
ftime:=0.0010
** MUXER_LAVF  
*****************************************************************
REMEMBER: MEncoder's libavformat muxing is presently broken and can  
generate
INCORRECT files in the presence of B frames. Moreover, due to bugs  
MPlayer
will play these INCORRECT files as if nothing were wrong!
*******************************************************************************
OK, exit
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
= 
= 
========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffflv] vfm: ffmpeg (FFmpeg Flash video)
= 
= 
========================================================================
audiocodec: framecopy (format=6 chans=1 rate=22050 bits=16 B/s=0  
sample-0)
VDec: vo config request - 240 x 180 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (240x180 fourcc=31564c46 [FLV1])
VIDEO CODEC ID: 22
AUDIO CODEC ID: 10007, TAG: 0
Writing header...
[NULL @ 0x67d110]codec not compatible with flv
Floating point exception