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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using avidemux GUI would avoid the need to know the ffmpeg command line,it also tells you which frames are I frames so you can just cut at the I frame and insert the desired clip without the need to reencode so it would be quicker,only limitation is needing to cut on the I frame
(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)
i'm actually 90% done now - i've got two files (one 0:49:35 long, another 0:04:12 long) that i need to concatenate. i wanna use avidemux, but it seems like avidemux outputs files as .MKV, which YouTube can't take... what should i do next? (thanks for yall's help btw!!)
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shit, actually - i found the avidemux setting to use the mp4 muxer. was terrified it would just recompress the entire thing, but it's going lightning fast... i think we're okay...?!?pic.twitter.com/zrP8b0wXyF
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looks like this might be useful https://forum.videohelp.com/threads/334017-Exporting-MP4-with-Avidemux … you can also use ffmpeg to move it to an mp4 encoder without re-encoding. although can't help much bc at a restaurant in a LTE dead zone (cupertino california)
Thanks. Twitter will use this to make your timeline better. UndoUndo
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