[MEncoder-users] Error encoding to ljpeg

salsaman salsaman at xs4all.nl
Wed Dec 7 00:48:40 CET 2005

Rich Felker wrote:

>On Tue, Dec 06, 2005 at 08:46:33PM +0100, salsaman wrote:
>>I have discovered a nasty bug with encoding to ljpeg. This is with version:
>>MEncoder 1.0pre7-3.4.1 (C) 2000-2005 MPlayer Team
>>CPU: Intel  (Family: 8, Stepping: 1)
>>Detected cache-line size is 64 bytes
>>CPUflags: Type: 8 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>>Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
>>Using sample jpegs which were produced by same version mplayer, and the 
>>mencoder -mf h=480:w=640:type=jpg -o "tmpvid" -ovc lavc -lavcopts 
>>vcodec=ljpeg -noskip -ofps 25.000 mf://*.jpg -frames 10
>You need to add a -lavcopts format=[some rgb format] for ljpeg to
>work. However this command line is pointless. If your files are jpeg
>already, converting them to ljpeg will just make them BIGGER. Instead,
>use -ovc copy to just copy the jpeg files into the output file as
>mjpeg frames. This should work as long as they were created with just
>normal baseline jpeg settings, nothing odd/special.
thanks for that, with -ovc copy it works like a dream !


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