[MEncoder-users] Creating an avi from a group of jpgs

[Giacomo Comes]

On Thu, Aug 16, 2007 at 04:58:34PM -0700, Alex Nyers wrote:
> Hello all,
> 
> I have been struggling with creating an avi from a group of jpg's (~14
> thousand) that I took with an intervalometer and a nikon d5300 over
> the summer at an archaeology dig. The images were originally taken at
> 2592x1944, then scaled down to 1024x768. Originally I tried to use the
> batch feature with paint shop pro 8 to change the resolution, but it
> failed after processing a few hundred, so I used imagemagick (winxp)
> to convert them. The string used was "mogrify -resize 1024x768 *.jpg".
> I then download mplayer via the svn trunk from the mplayerhq site, and
> ran the following string to convert them into a mpeg using my linux
> box: "mencoder mf:///alex_c_drive/pics/testing/ -mf fps=25:type=jpg
> -ovc lavc -lavcops vcodec=mpeg4:mbd=2:trell -o
> /home/nyersa/output.avi". The images are being pulled across the
> network from my windows box to the linux box via a samba share, and
> then stored locally as an avi on the linux box. Whenever I try to
> create the avi, I get blue artifacts on the bottom third of the frame
> after ~ 100 jpg's are processed. I have tried using different codecs,
> such as mpeg2 and mjpeg, but with no difference in results. I have
> included a group of 100 images, and the output.avi file that I get
> when I run the previously mentioned string on the ftp site
> (ftp://upload.mplayerhq.hu/MPlayer/incoming/) in a file called
> images.zip. Any help would be most appreciated. Thanks,

Try adding the option -vc ijpg. If it doesn't help try to 
convert the images to png or tga before using mencoder.

If the issue is stil there then you have another kind
of problem I'm not aware of.

Ciao
Giacomo