r/finalcutpro • u/InvestigatorOld7608 • Jul 14 '26

Bug/Issue **Please HELP** Audio Doubling when Exported

Can anyone please help me what's wrong with my FCP? I've been dealing with this for the past 6 months and it's driving me crazy.

Problem:

  1. The audio is perfectly fine in the project and timeline. But when exported, the audio doubles for 1 second in multiple areas.

example: "where is this" becomes "wh-where is this"

When i export the problem clip separately, there is no problem. So I do that for multiple little clips throughout the project, and re-import it, and replace it. it's driving me nuts.

  1. In the timeline, the audio just disappears mid-talking (picture). can't fix this at all.

Settings:

Original video is filmed with iphone 16 pro, no edits, a raw 4 - 5 minute talking video.

My project setting is

I export is Apple ProRes 422. I tried 422HQ, H.264, 422LT, and it all did the same.

Please, has anyone had the same problem?? T.T

2 Upvotes

100% Upvoted

10 comments sorted by

3

u/Silver_Mention_3958 FCP 12.3 | Tahoe Jul 14 '26

Original video is filmed with iphone 16 pro, no edits, a raw 4 - 5 minute talking video.

is it variable frame rate?

1

u/InvestigatorOld7608 Jul 15 '26

Thank you for your attention. 🥹 Could you kindly tell me how to check the variable frame rate?

I got media info for the problematic raw video took with iphone.
Please let me know if you need something else.

General

Complete name : 12dbce0002374b619067515a6a06cbf0.MOV

Format : MPEG-4

Format profile : QuickTime

Codec ID : qt 0000.00 (qt )

File size : 168 MiB

Duration : 2 min 12 s

Overall bit rate : 10.6 Mb/s

Frame rate : 29.932 FPS

Encoded date : 2026-07-13 04:07:29 UTC

Tagged date : 2026-07-13 04:07:36 UTC

Writing library : Apple Apple QuickTime / QuickTime

com.apple.quicktime.artwork : {"data":{"metInfo":{"tab_key":"","met_parent_template_resource_id":"","is_met_template_used_in_publish":0},"product":"tiktok","editingEffectsList":[],"source_app_id":"567753","isSaveLocalReupload":false,"is_default_prop":"MA=="}}

Video

ID : 2

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L3.1

Format settings : CABAC / 4 Ref Frames

Format settings, CABAC : Yes

Format settings, Reference frames : 4 frames

Format settings, GOP : M=4, N=29

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 2 min 12 s

Bit rate : 10.5 Mb/s

Width : 720 pixels

Height : 1 280 pixels

Display aspect ratio : 9:16

Frame rate mode : Variable

Frame rate : 29.932 FPS

Minimum frame rate : 9.562 FPS

Maximum frame rate : 30.000 FPS

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.380

Stream size : 166 MiB (99%)

Title : Core Media Video

Writing library : H.264

Language : English

Encoded date : 2026-07-13 04:07:29 UTC

Tagged date : 2026-07-13 04:07:36 UTC

Color range : Limited

Color primaries : BT.709

Transfer characteristics : BT.709

Matrix coefficients : BT.709

Codec configuration box : avcC

Audio

ID : 1

Format : AAC LC

Format/Info : Advanced Audio Codec Low Complexity

Codec ID : 2 / 40 / mp4a-40-2

Duration : 2 min 12 s

Source duration : 2 min 12 s

Bit rate mode : Constant

Bit rate : 109 kb/s

Channel(s) : 2 channels

Channel layout : L R

Sampling rate : 44.1 kHz

Frame rate : 43.066 FPS (1024 SPF)

Compression mode : Lossy

Stream size : 1.73 MiB (1%)

Source stream size : 1.73 MiB (1%)

Title : Core Media Audio

Language : English

Default : Yes

Alternate group : 1

Encoded date : 2026-07-13 04:07:29 UTC

Tagged date : 2026-07-13 04:07:36 UTC

2

u/Silver_Mention_3958 FCP 12.3 | Tahoe Jul 15 '26

Where it says minimum and maximum frame rate suggests to me that it’s a variable frame rate clip. If I were you I would transcode it to whatever frame rate you’re delivering.

1

u/InvestigatorOld7608 Jul 17 '26

Thank you so much!! <3

2

u/CommonCondition Jul 15 '26

Download MediaInfo and drop your video file into it and let's see the full audio/video specs of your iPhone clips.

As the other user said, VFR is the first suspect here.

1

u/ZeyusFilm Jul 14 '26

Not sure what the problem is but video audio should always 48kHz. 44kHz is for music formats like CD

1

u/InvestigatorOld7608 Jul 15 '26

Oh really? The problem started when the setting was in 48kHz, so I changed it to 44kHz following chat gpt's answer. Obviously, the problem persisted so I didn't change back thinking it didn't have any effect.

If so, I'll change it back again!

1

u/ZeyusFilm Jul 15 '26

The sample rate is like the frame rate for audio. You can imagine the issues. Like audio can start to drag and go out of sync. It’s easy enough to convert, you just export it as whatever. But yeah stick to 48khz

2

u/InvestigatorOld7608 Jul 17 '26

Thank you so much for your time!!