hey, if i wanted to add a short 30-second clip to an hour-long video encoded in h.264...
is there a way to do that without spending 80 minutes exporting the whole entire video in Premiere all over again?
asking for a friend 
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you should be able to cut the beginning into a separate video, the end into a separate video, and then combine them all. i did this a few months ago with ffmpeg. if avidemux does this it should be possible too
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My question though, is that really doing the append? Or is it just reencoding all three files into one (with additional loss with the files being re-encoded)
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NICK JUST POST THE VIDEO DONT DO THIS TO US!!!!
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how long is an export of the video? All the children want this video NOW
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(i'm sliding in an extra 30-second clip near the end but BEFORE the annotation end slate, so it's sadly not just straightforward concatenation)