Legacy ImageMagick Discussions Archive

I think I found sample instead of resize at the same moment you guys were posting.

The final sequence of operations is:
convert -size 1x1 xc:black xc:white -append \( -clone 0 -rotate 180 \) +append -write mpr:cell +delete -size 1200x768 tile:mpr:cell mask.gif
convert in.gif -interlace Partition ...

The following sequence almost works to produce the interleaved UV plane.

convert -size 1x1 xc:black xc:white -append \( -clone 0 -rotate 180 \) +append -write mpr:cell +delete -size 1200x768 tile:mpr:cell mask.gif
convert in.gif -interlace Partition foo.yuv
mv foo.U foo.U.R
mv foo.V foo.U.R ...

It may work I just got to my computer (I was reading your msgs via phone last night) so I haven't had a chance to try it or even understand it.

I tired it, it didn't work right off the bat but that might be because I don't understand a few things, I'm pretty much a newbie to IM

Here is what I did ...

Hmm interesting:

convert src.gif -interlace Partition dest.yuv

Will produce 3 files dest.y, dest.u, dest.v, the .u and .v files are the desired 1/4 size, I just need to figure out how to interleave them into one file after that I can just concatenate the .y file with the combined file and I'm done ...

Thanks for the links but I've read through those and haven't found anything.
I was thinking that someone more knowledgeable of IM might know some way to split the planes out and then recombine them the way I want them.

Thanks
Matt S.

Thanks for trying but that doesn't do what I'm looking for.

I described the NV12 format in the original post.
To illustrate YYYYY.... UVUVUV.... (The u and v data is 1/2 the height and width of the Y data.)
The command you posted will produce YUV with the 1/2 height and width U and V planes, but ...

I need to convert some jpeg images into raw YUV images in the NV12 format.
The NV12 format: 8-bit Y plane followed by an interleaved U/V plane with 2x2 subsampling.

Can this be done with imagemagick?

Thanks,
Matt S.