FCPX - Browser to Timeline - synch problems

Question

FCPX - Browser to Timeline - synch problems

Hello all,

So I have some footage recorded on a Canon R6, recorded with in-camera audio, no external audio device used. In the browser the footage is in synch, though when i insert a clip into a project timeline, the audio / video is out of synch. This doesn't happen with the clips from my Canon 5D Mk 3. I have used a timeline in a 'project' to store lots of clips from both cameras.

In the timeline, when i detach the audio, the Source Timecode says video/ audio are in synch.

Very confused and I have a deadline for this project.

Any ideas about what is going on?

Thanks - Jamie

iMac 27″, macOS 10.13

Posted on Jun 12, 2022 11:10 PM

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Answer 1

Top-ranking reply

Luis Sequeira1

Level 9

74,358 points

Jun 14, 2022 11:28 AM in response to jamiecamberwell

Here is the thing: there is some mismatch in how the clips' frame rates are interpreted.

The Inspector, like Quicktime Player, and MediaInfo, all report the clip as 25fps.

I put the clips in a 25fps project, they play in sync.

However, if I create a project with automatic settings for one of these clips, the project comes out at 23.98fps, and then I see the audio and video out of sync.

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Answer 2

Tom Wolsky

Level 10

152,819 points

Jun 14, 2022 1:05 PM in response to Luis Sequeira1

Interesting. "However, if I create a project with automatic settings for one of these clips, the project comes out at 23.98fps" Can't reproduce that. Automatic creates a 25 project for me. The media should not go out of sync in a 23.98 project. It's not drift it's out of sync from the beginning.

Depending on which media has the most footage, and what frame rate needs to be delivered, I'd suggest using Compressor to convert the files.

I converted the 25 to 23.976, and it played correctly in the 23.98 project. The 23.976 conversion also plays perfectly, as it should, in the 25fps project.

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Answer 3

terryb

Level 4

3,535 points

Jun 14, 2022 1:01 PM in response to jamiecamberwell

What if you manually create a 25FPS project as Luis has done and put the 25 and 23.976 footage into it?

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Answer 4

Tom Wolsky

Level 10

152,819 points

Jun 13, 2022 1:32 AM in response to jamiecamberwell

Please give complete specifics of the media file from MediaInfo or Invisor or the QT player.

Give the complete project properties.

Video with audio has a single TC track. There isn’t separate TC for video and for audio.

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Answer 5

terryb

Level 4

3,535 points

Jun 14, 2022 11:08 AM in response to jamiecamberwell

Just search for fcpbook dot com

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Answer 6

Jun 13, 2022 1:28 PM in response to Tom Wolsky

General

Complete name : /Volumes/Jamie BackUp 2/Arts International/SENTalk/R6 video/R6-2.MP4

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42 (mp42/avc1/CAEP)

File size : 323 MiB

Duration : 1 min 30 s

Overall bit rate : 30.0 Mb/s

Encoded date : UTC 2022-05-11 15:02:35

Tagged date : UTC 2022-05-11 15:02:35

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L4.1

Format settings : CABAC / 2 Ref Frames

Format settings, CABAC : Yes

Format settings, Reference frames : 2 frames

Format settings, GOP : M=3, N=12

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 1 min 30 s

Bit rate : 28.5 Mb/s

Width : 1 920 pixels

Height : 1 080 pixels

Display aspect ratio : 16:9

Frame rate mode : Constant

Frame rate : 25.000 FPS

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.549

Stream size : 306 MiB (95%)

Language : English

Encoded date : UTC 2022-05-11 15:02:35

Tagged date : UTC 2022-05-11 15:02:35

Color range : Full

Color primaries : BT.709

Transfer characteristics : BT.709

Matrix coefficients : BT.709

Codec configuration box : avcC

Audio

ID : 2

Format : PCM

Format settings : Big / Signed

Codec ID : twos

Duration : 1 min 30 s

Bit rate mode : Constant

Bit rate : 1 536 kb/s

Channel(s) : 2 channels

Sampling rate : 48.0 kHz

Bit depth : 16 bits

Stream size : 16.5 MiB (5%)

Language : English

Encoded date : UTC 2022-05-11 15:02:35

Tagged date : UTC 2022-05-11 15:02:35

Other

ID : 3

Type : Time code

Format : QuickTime TC

Duration : 1 min 30 s

Bit rate mode : Constant

Frame rate : 25.000 FPS

Time code of first frame : 06:09:47:13

Time code of last frame : 06:11:17:17

Time code, striped : Yes

Language : English

Encoded date : UTC 2022-05-11 15:02:35

Tagged date : UTC 2022-05-11 15:02:35

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Answer 7

Jun 14, 2022 12:45 PM in response to Luis Sequeira1

Thanks very much Luis and Tom..... Unfortunately though i have other footage filmed on a Canon 5D Mk 3 which is 23.98. I guess then i can't use the same project for footage from these 2 camera. Do i have any other options?

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