[MEncoder-users] PNG to AVI : Error while decoding frame!

[Gilles Quemener]

Hello,

In order to make some small animations from PNG files created with Pov-Ray,
I have just installed MPlayer/Mencoder on my Linux system. But when I tried
to type the following command line, I get some error messages like  "Error
while decoding frame!" (see output below) and I do know how to solve it, 
therefore, I would really
appreciate if someone could help me.
Thanks a lot,

                    Gilles

/ucn/quemener/local/MPlayer-1.0pre8/example_gq<345 >../bin/mencoder 
"mf://*.png" -mf fps=25:type=png -ovc lavc -lavcopts vcodec=mpeg4 -of 
avi -o sortie.avi
MEncoder 1.0pre8-3.2.3 (C) 2000-2006 MPlayer Team
CPU:               Intel(R) Pentium(R) 4 CPU 3.20GHz (Family: 15, Model: 
4, Stepping: 3)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

success: format: 16  data: 0x0 - 0x0
[mf] search expr: *.png
[mf] number of files: 70 (280)
VIDEO:  [MPNG]  0x0  24bpp  25.000 fps    0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:16  fourcc:0x474E504D  size:0x0  fps:25.00  ftime:=0.0400
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: [ffpng] vfm: ffmpeg (FFmpeg PNG decoder)
==========================================================================
Error while decoding frame!
Error while decoding frame!0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]
Error while decoding frame!0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]

1 duplicate frame(s)!
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not 
writing vprp header.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not 
writing vprp header.
Error while decoding frame!0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]

1 duplicate frame(s)!
Writing header...