python script to manipulate image sequences

[greatPumpkin]

here's a directory walking snippet:


import os

# make a list to store the images that we find
images = []

# a simple example for finding iff's:
for root, dirs, files in os.walk('~/mydir'):
for file in [f for f in files if f.endswith(".iff")]:
# store the files in a list
images.append(file)



for beyond this you can use os.path.getsize to get the size of a file. Once you have the file size for every image in a sequence you can average their size and test the if individual members are below a certain percentage average? missing frames should be relatively straight forward once you're looping over every image.

if this is for a pipeline you can simplify much of this code if you force the user to use a standard padding convention, and standard paths for rendering rather then just walking an entire folder structure, and trying to account for every possible naming/numbering permutation.

For qualifying sequences i would look for code examples of regular expressions in python. google should have loads of results.

you can also take advantage of python's object oriented functionality by making a image sequence object that has attributes and methods that identify a sequence, then the objects themselves can have copy, move methods, and return missing/bad frames methods that should make handling them relatively easy/transparent

Hope that helps-

[luxwork]

thanks for this

for the abnormal frames I would calculate an average of neighboring frames to find bad ones, since with rle files it can be hard to pick them out. Although, I have to say that I run into half frames infrequently with our switch to 64 bit

yes, enforcing the name conventions works, but there is always that runaway user..

I have been looking at the template feature of the string module, it looks like there may be some efficent techniques with that


you can also take advantage of python's object oriented functionality by making a image sequence object that has attributes and methods that identify a sequence, then the objects themselves can have copy, move methods, and return missing/bad frames methods that should make handling them relatively easy/transparent

Hope that helps-

That's a cool idea, and yes, it helps
MD

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