What is the current work flow to
play 32bit texture?
currently I would think of playing 32 bit
exr files and cache them to memory.
I wonder if there is any recommended
compression for the exr.
Also generally wondering what will be fast
and efficent methods to
record compress stream or play
32 texture.
Hey Barak
The pack TOP will do what you need. It will pack each 32 bit channel into 4 8 bit channels and make the texture one dimension wide for each channel packed. A movie can then be recorded, played back and unpacked.
It’'s a great TOP.
cheers
Keith
.
thanks mate,
will try it out.
Which video compression is preferable ?
so far animation codec seem work well…
HAPQ for example giving noisy results.
Seem like the only way it to work is by record pack of 4 RGBA animation codec.
then, Unpack with RGB mode ( not RGBA )
not sure i understand the math, .
if i have for example 100X100 32bit RGBA texture
its should pack it in 400X100 8 bit RGBA texture.
0 \ 1 array with the length of ( 2^8 + 2^8 + 2^8 + 2^8 )
in practice its only support the first 3 channels and create 300X100 8bit RGB texure.
(where is the forth 2^8 to complete the array ? )
also
could be that usually alpha channel is meaningless in term of 32bit?
if so
why there is option to unpack also the forth channel in the pack node ?
can i add the 4 channel manually later ?
what i miss ? 
You definitely need to use a lossless codec for this, so animation or lossless .tiff or RAW .avi. Definitely something weird with your RGBA vs. RGB issue as they should match up directly. Can you share some sample files with support@derivative.ca?
Hi Malcolm,
Its seem to work well, I just didnt understand first how it works from Keith Explanation.
I`m adding here test project I have made.
if possible I would happy to see way to preserve the aspect ratio information, instead of doing so manually as can be seen in the test file.
(divide the horizontal res by the number of channel maybe).
Test file:
drive.google.com/a/barakooda.co … sp=sharing