I needed to convert a raw YUV image to something viewable on my computer. There are a few tools to do so, including the wonderful ImageMagick toolset. However, running my image through this did not work as is.
The source image is a frame from an HD-SDI stream, which has a color-depth of 10 bits instead of the usual 8. The sample packing seems to be UYVY, but using 16bit per component (with the lower 6 bits always 0).
Since I only wanted to have a quick view of the frame, I just discarded the lower 2bits (i.e. byte) and converted that instead. This perl-script discards the least significant byte:
while( read STDIN, my $block, 2 ) {
my @value = split //, $block;
print $value[0];
}
The output can be fed into ImageMagick’s convert tool:
convert -size 1280×720 -interlace none -sampling-factor 4:2:2 8bit.uyvy out.bmp
