Optimize issue: Failed creating multi encoder: invalid filter in multi filter array

[gunnsth]

Problem file: TheCaseStudyMethod.pdf

Options:

unioptimize.Options{
    CombineDuplicateDirectObjects:   true,
    CombineIdenticalIndirectObjects: true,
    ImageUpperPPI: 100.0,
    CombineDuplicateStreams:         true,
    CompressStreams:                 true,
    UseObjectStreams:                true,
    ImageQuality:                    80,
}

When optimizing get:

[ERROR]  encoding.go:1855 Unsupported filter CCITTFaxDecode
[ERROR]  stream.go:42 Failed creating multi encoder: invalid filter in multi filter array

Seems like the CCITTFaxDecode filter is not ignored during compression when inside a multi filter encoder.

[anovik]

This has been implemented, we have CCITTFaxDecode decoding and encoding support in UniPDF.