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I played out a file from KIPRO Rack with captions and recorded to computer using AJA Control Room.
That file has embedded captions. When I import the file into Premiere, captions start at beginning of file. But audio doesn't start for 5 minutes. The file plays with caption in sync using VLC.
why does this happen and how do I fix?
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Captions are complicated. PR must interpret the import, and creates a cache file upon an embed import. If it finds problems, it will default or skip particular captions.
I just tested in PR 2014.3.2, exported a simple 608 caption stream embedded in mxf op1a. It reimports with the caption timing correct.
What type of caption stream are you embedding?
Stan
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708 captions.
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Test works with 708 also.
These are simple test files, so not useful for subtle sync issues. But the caption starts at the nonzero point I had in the project.
First, create a simple test sequence similar to your import. Set the caption at the same point; doesn't matter whether in sync with the actual audio. Just not the timecode. Export as mxf op1a with embed, and reimport. That may tell us whether it is a mismatch of some type between the exporting system and PR's import.
Stan