FCP X slow when editing

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Level 1

5 points

FCP X slow when editing

I am having problems editing a simple video. Currently I have four simple clips, each about 6 seconds long. The spinning rainbow wheel appears for a few seconds when I move to a different part of the time line and play the video from that point. If I use the cursor keys to move the video a frame at a time there is a brief pause. When playing back in the time line and moving from the third and fourth clip the video freezes a second before the edit and a second after. I tried all this on the timeline of a video I made a while ago and none of this happens.

I'm using a MacBook pro early 2015, 2.9 GHz Intel Core i5 processor, 8 GB memory and a Intel Iris Graphics 6100 1536 MB. OS is High Sierra 10.13.6 FCP X is 10.4.3

Posted on Oct 22, 2018 5:06 AM

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Answer 1

Paul Bishop Author

Level 1

5 points

Oct 22, 2018 7:04 AM in response to Tom Wolsky

The recording was made by a Sony FX1 video camera using mini HDV tapes.

The following comes from the specifications in the camera operating manual and hopefully gives the information you need.

Video signal PAL colour, CCIR standards, 1080/50i

Audio Recording MPEG-1 Audio Layer 2. Qualtization 16 bits (Fs 48 kHz stereo)

Audio/Video input/output

Video signal 1Vp-p, 75 ohms unbalanced, sync negative

Audio signal 327 mV (at load impedance 47 kilohms, Input impedance more than 47kilohms, Output impedance less than 2.2 kilohms

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Answer 2

Tom Wolsky

Level 10

151,034 points

Oct 22, 2018 7:46 AM in response to Paul Bishop

I think it's the MPEG-2 that's the problem. Normally when Apple applications ingest HDV they rewrap to QuickTime. Some applications transcode to other codecs as well. I can't test anything with HDV in the current OS any longer.

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Answer 3

Paul Bishop Author

Level 1

5 points

Oct 22, 2018 10:16 AM in response to Paul Bishop

That solved the problem.

Thank you for your help !

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Answer 4

Tom Wolsky

Level 10

151,034 points

Oct 22, 2018 5:50 AM in response to Paul Bishop

Please give the exact specifications of the media, format, resolution, codec, frame rate, audio format, and audio sample rate.

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Answer 5

Tom Wolsky

Level 10

151,034 points

Oct 22, 2018 7:09 AM in response to Paul Bishop

Can you open one of the files in the QuickTime player and report what it says in the inspector window or post a screenshot?

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Answer 6

Paul Bishop Author

Level 1

5 points

Oct 22, 2018 7:25 AM in response to Tom Wolsky

Format MPEG-2 Video, 1440 x 1080 (1888 x 1062)

Linear PCM, 32 bit little-endian

floating point, 48000 Hz, Stereo (L R)

FPS 25

Data Rate 28.07 Mbit/s

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Answer 7

Paul Bishop Author

Level 1

5 points

Oct 22, 2018 8:22 AM in response to Tom Wolsky

Is there anything I can do to solve the problem ?

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Answer 8

Tom Wolsky

Level 10

151,034 points

Oct 22, 2018 10:17 AM in response to Paul Bishop

You might try optimizing or converting the media to a format the works. Optimized files would be easiest on the system but are large files and require good drives.

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Answer 9

Paul Bishop Author

Level 1

5 points

Oct 22, 2018 9:34 AM in response to Tom Wolsky

Thank you. I'll try that.

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FCP X slow when editing

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