I need to duplicate an object that has an attached Paperclip file. This file (depending on its file-type) may have two to four different styles, with separate file-processing stages required for each. Some of these involve transcoding in FFMPEG, so I would really rather not run the processors all over again, when the various re-coded versions already exist on S3.

The naive thing (which I have done, and works) is simply to create a new object, open the original file from S3 using open-uri, and run the process over again. This works, but takes a long time, since some of these movie files are large and the processing steps to make thumbnails and poster frames are weighty.

Searching for solutions on this, I came across the dup method, and I also saw a dup method on the Paperclip attachment when I inspected its methods. Before I go into a lengthy yak-shaving exercise here, can anyone point me to a simpler way to manage what I am trying to accomplish here? Essentially I want to duplicate a group of files in place on S3 (yes, I realize you can't do that without copying them) but I want to skip all the processing steps and just duplicate the styles "manually".

Thanks in advance,

Walter

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postedAug 9, '13 at 9:16p
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Walter Lee Davis: 2 posts

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