Delete every 7th frame

Question

Level 1

10 points

Delete every 7th frame

Dear video editors,

Greetings !

To make a long story short - could you advice wether it is possible in FCP X to delete every Nth frame from video (or maybe there is an addon or 3rd party program capable of this).

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For the patient ones...the problem is as follows: I've found an old video of school years made on digital camera. Once it was shooted the video was fine, but through many years something happened (maybe I edited or transcoded it? not sure) and now this video is damaged - every 7th frame is corrupted. By corruption I mean some kind of frame shift, please find 2 pictures attached. There is a nice frame, and the second shifted one. So when you view the whole scene the picture seems to...flicker I would say.

Since I have no idia what caused this problem I think the easiest way to solve it - just to delete all these "bad" frames from the video. Thanks god this is EXACTLY every 7th frame so I hope I wont have to delete them manualy.

BRGDS

Stan

MacBook Air, Mac OS X (10.7.1)

Posted on May 4, 2014 3:12 AM

Reply

Answer 1

May 4, 2014 10:07 AM in response to Moloy

I think you may be seeking the impossible, but in any case, if you delete every seventh frame the video will still be jerky due to the lost or dropped frames.

I also suspect that the problem may not be so much in the tape as in the camera . . . . could you test it with a different camera?

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Answer 2

Moloy Author

Level 1

10 points

May 4, 2014 10:57 AM in response to Ian R. Brown

Good day) To avoid this kind of solutions I mentioned "Once it was shooted the video was fine". So the camera shooted correctly, I have tons of videos collected for 5 years... and this is the only one corrupted (the video was fine few years ago....but then I guess I edited it...not sure...and I've noticed the corruption only now). I tried to manualy delete every 7th frame for 5 SECONDS - the video is good enough and not realy jerky. But I can not manualy do this for 5 MIN long video you know 🙂

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Answer 3

Moloy Author

Level 1

10 points

Jun 28, 2014 7:19 AM in response to Moloy

No fresh ideas so far? I've seen answers on very similar questions on Adobe Community forums (the topic "deleting every nth frame (again)"), but for FCP user the answer there was useless for me

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Answer 4

fox_m

Level 6

13,270 points

Jun 28, 2014 4:54 PM in response to Moloy

-> -> -> -> -> -> -> command-B -> option-\

repeat

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Answer 5

Alchroma

Level 7

23,918 points

Jun 28, 2014 5:46 PM in response to Moloy

See if a Time Base Corrector will clean up the signal from the tape.

Even use the TBC between two cameras/decks and dub another copy.

Al

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Answer 6

Drew Reece

Level 6

10,684 points

Jun 28, 2014 6:20 PM in response to fox_m

Is this the keyboard shortcuts to achive the 7th frame deletion?

Automator & Applescript will record keyboard commands (with varying degrees of sucess - try them all). They will also play them back. Record it once. Copy & paste, cross fingers & test it.

I think ffmpeg would also do this via an insanely complex command, that I don't know the ffmpeg forums may help, but. it isn't easy.

Personally I'd look for someone with whatever the magic Adobe software is (or rent it). You should also check that it is the 7th frame all the way through, otherwise you would need to actually detect the damaged frames.

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Answer 7

fox_m

Level 6

13,270 points

Jun 28, 2014 6:52 PM in response to Drew Reece

Yes -- 7 right-arrow, blade, 1 right arrow, trim to playhead.

I thought of automator, but don't have enough experience with it to really apply it. A much better automator action would just be the blade/right arrow/trim-to-playhead action to delete a single bad frame and you would manually find the bad frames.

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Answer 8

Moloy Author

Level 1

10 points

Jun 29, 2014 6:02 AM in response to Moloy

Yo guys, thank you for replies and suggestions!

Finally I decided to get around with Automator. I read some basic stuff from google, created an AppleScript:

repeat 1400 times

tell application "Final Cut Pro" to activate

delay 0.05