Hi, I'm am developing a tool using OpenEXR. I use the MultiPartOutputFile API because I will eventually support multi-part files. As an initial test, I tried writing a single part file with the multi-part API. I didn't want to implement two different interfaces, so I didn't use the single-part API.
In the function GenericOutputFile::writeMagicNumberAndVersionField, called by the constructor of MultiPartOutputFile, a special check is made for (parts == 1). If it's the case (it was for me), headers[0].type() is called. Unlike the other types of files, MultiPartOutputFile does not set the file type to SCANLINEIMAGE. As a result, the attribute is not set, and causes a crash. A workaround consists of manually calling SetType(SCANLINEIMAGE) after creating the header. However, to avoid that someone get into the same issue, I suggest that MultiPartOutputFile should be set to SCANLINEIMAGE by default, like it's the case for the other API. Thanks
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