Exr quality

[bonsak]

Hi
Im making a simple script to convert QT prores 422 LogC to exr linear in Draft 13.1. Exr-files written from Draft have apparent compression artifacts not visible in the original quicktime-file. Doing the same conversion in After Effects results in a smooth image. Any ideas?

Cheers
Bonsak

[paul]

Would it be possible for you to please send us a QuickTime file that reproduces this problem?

It would be great if you could also send us:

1. An EXR file exported using After Effects, and
2. A copy of the Draft script you’re using.

You can send us files using our ticket system. It’s easiest to put all the files in one big ZIP file.

[bonsak]

Sure. First thing Monday.

Cheers
Bonsak

[bonsak]

Sent the files. Forgot to send the script, so here it is:

import sys
import os

print sys.path

import datetime
import copy
import Draft
from DraftParamParser import *

scale = 1

expectedTypes = {}
expectedTypes['username'] = '<string>'
expectedTypes['entity'] = '<string>'
expectedTypes['version'] = '<string>'
expectedTypes['startFrame'] = '<int>'
expectedTypes['endFrame'] = '<int>'
expectedTypes['inFile'] = '<string>'
expectedTypes['outFile'] = '<string>'

params = ParseCommandLine( expectedTypes, sys.argv )

inFilePattern = params['inFile']
fileToWrite = params['outFile']
startFrame = int(params['startFrame'])
endFrame = int(params['endFrame'])

cineonlut = Draft.LUT.CreateCineon().Inverse()

decoder = Draft.VideoDecoder( inFilePattern )
frameImage = Draft.Image.CreateImage( 1920, 1080 )
frameNumber = 1

while( decoder.DecodeNextFrame( frameImage ) ):
   #process the decoded frames here

   	cineonlut.Apply( frameImage )
	frameImage.WriteToFile( "/Users/bonsak/test/Mov-to-exr" + "." + str( frameNumber ) + ".exr" )
	frameNumber = frameNumber + 1

Cheers
Bonsak

[paul]

Thank you! We reproduced the problem using the data you sent to us, and we will look into it.