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Windows media export weirdness
I have a 30-second spot on my FCP timeline and I went to export a Windows Media file. I marked the in and out of the clip on my timeline, went to export file>using quicktime conversion, selected WMV from the offerings there, in the detail settings, picked Windows Media 9 professional, and ok’d the export. And I got a fine looking wmv file out of that, only it always comes out half the length it was marked as. I marked 30 seconds on my timeline and the Windows media file ends at the 15 second point. Did this several times.
I went to the timeline and moved the out point to the one minute mark, and re-exported using all the same settings, and all is well. But that’s weird, since there seems to be no reason for that, and moreover, there’s nothing more on the timeline but dead empty space, not even a slug or anything, leading for 30 seconds from where the spot ends, to the marked out point.
Don’t get me wrong; I’m happy with the output I’m getting. I’m just curious why it seems I have to exactly double the marked duration of the source on the timeline to get an encoded file that’s the proper running length. Any insights?