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Rev

Thank you very much for the reply but I van you explain this command a bit more, are this two different commands that I can use scale or pad or they both should be used at the same time ? and in (iw*sar) should I write something in them ? Thank you
– Levan
Commented Mar 19, 2015 at 15:54
1

I edited the answer to provide more detail about the command. Bottom line: It is a single command. the only thing you should change are "input.mp4" and "output.mp4" as appropriate for your desired source and destination.
– Brian
Commented Mar 19, 2015 at 16:55
2

By the way, there is a very similar Q/A here: superuser.com/questions/547296/…
– Brian
Commented Mar 19, 2015 at 17:01
I had to add -aspect 16:9 aspect ratio argument force an exact 16:9 metadata flag. I realized it was a tiny bit something else after running an input file through mp4box dash splitter.
– Whome
Commented Jul 5, 2017 at 17:02
PERFECT ANSWER. I've been struggling to upscale and pad my videos correctly but this does precisely that.
– hedgehog90
Commented Mar 6, 2020 at 18:02

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