Im using a bit older a version 1.7.17.
Im trying to find the quickest way to set the RGBA default channels of a 37
channel 4k openexr file to a 0.0 value. Im doing this to replace
missing/bad frames in a sequence. On my fairly hefty workstation its taking
48 seconds. I could just do this once per sequence and duplicate for every
other missing/bad frame but ... Im trying to keep everything else in the
file intact like resolution and metadata etc
At first I tried this ... which understandably takes 48 seconds.
oiiotool -i frame.exr --mulc 0.0 -o foo.exr
after reading the programmer document with it's excellent examples I did
this:
oiiotool -threads 0 --autitile 1 --threads 0 --autotile 1 -i:ch=R,G,B,A
frame.exr --ch R=0,G=0,B=0,A=1 --compression "zip" -o foo.exr
still took 21 seconds ... ...
Threads: 32
oiiotool runtime statistics:
Total time: 21.29s
--ch : 21.13
-o : 0.14
input : 0.01
unaccounted : 0.00
Peak memory: 2.0 GB
Current memory: 2.0 GB
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