How to slow down or extend video at high quality?

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Level 1

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How to slow down or extend video at high quality?

I made video in October of me playing guitar outside. Was unexpectedly cold. Minus 2 celsius. I didn't think about musicality of my playing - I just played faster than usual so that my fingers wouldn't freeze up.

It is a Bach piece. Normaly it takes me about 2:45 to play, and I add pauses. In the video I play it rushed in about 2:30, also no slight pauses where I typically do pauses.

I just recorded the piece in my studio and am now syncing audio to video. Here is what I am trying to do:

Slow down whole video about 10%. It was shot 25 fps in 6K on Red Komodo.
In certain places in the video where I don't pause a note, extend that note, say by half a second or something. In this case I don't want to slow it down. I just want the moment to be extended a little bit in time, as if I paused. Slowing down wouldn't make sense in these cases. Just need to extend time.

Ideas on sites, tools? I know there is explosion in AI tools, just not sure where to look. Or just do it all in FCP natively?

thanks

Posted on Nov 25, 2023 9:54 PM

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Answer 1

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EcoGreg

Level 3

894 points

Nov 26, 2023 8:46 AM in response to bhuether

Hi b

You can "retime" your video and slow down by 10% for the entire project and/or you can retime portions within FCP. It would take some detailed work to get the audio and video to sync for the entire ~3minutes. My guess is that the speed up was not uniform throughout the piece. If the video shows the actually playing, exact matching will take work.

Is it possible to reshoot the video? This is most likely the best course of action if possible.

You could also just redo the audio timed to the video, but for music, timing reflects performers ability so it has to sound right!

If you have Logic Pro, I would export the audio to use the far more extensive tool set available. Vastly easier to rearrange, retime individual notes, pitch correction etc…. This of course requires LP and being able to use it. LP or a music editing app would be much better for correcting the original recording or matching new recording,

I would try to slow down the video in FCP, retime individual ranges in the clip, then finalize the music in LP to match the new video.

As Luis says, you can hide lots with b-roll. Maybe try reshooting the song with extreme close-up of instrument play, add images/photos, etc… b-roll cuts are standard movie making these days. Cover up, what cover up?

Hope this Helps, Greg

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Answer 2

Nov 26, 2023 1:58 AM in response to bhuether

I would not try to fully match one video to another. I would split the outside recording in a few pieces, using those places where you intended to pause playing.And I’d get some B-roll material to cover the parts where syncing proves more difficult.

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How to slow down or extend video at high quality?

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