Sony A7S III 4K 120 FPS imports at 60 FPS

My A7 is set up as follows:

XAVC HS 4K 120 4:2:0


When I import that footage it shows up in FCPX at 60 FPS.


I did a search but probably didn’t search good enough because surely someone else has had this problem. :-)


Any input would be greatly appreciated.

iMac 27″, macOS 11.3

Posted on May 8, 2021 5:56 AM

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Posted on May 8, 2021 11:47 AM

Post a screenshot of the extended inspector. The camera may shoot 60 and record 120.


Put the clip in a 60p project. Is it slomo or not? If not, select the clip and set Retiming to Automatic Speed. It should be slomo then.


What happens in the QT player/ Is there a circle in the corner of the icon in the browser?

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8 replies

May 12, 2021 6:30 AM in response to raronson

Sure it does. 119.88. This usually indicates that the camera is using a variable frame rate, or an unstable frame rate, which is a major problem in the production pipeline. 120fps is not a delivery frame rate; it's used solely for creating slomo. I have 120fps video. FCP shows it as 60p at the top of the inspector, but the extended inspector it shows the encoding frame rate.

May 12, 2021 7:04 AM in response to Tom Wolsky

Tom - I wasn't sure what to expect when I dropped it into the 60p project. Using automatic retiming helped tremendously.


When I film in S&Q mode, the clip is films at my setting of 23.98 and records 120 fps and it's solid. Very smooth slomo. When I open the "120 fps" clip in QT I see the retiming bars underneath the player controls. I didn't notice that before. I guess that should have been a clue as well.

May 12, 2021 6:27 AM in response to Luis Sequeira1

Attached is a screenshot of the QT Inspector for a clip I shot set to 120 fps. Unfortunately, the frame rate does not show.


I dropped the clip into a 60p project. It was not automatically slomo. After setting retiming to automatic it slowed. When I dropped the same clip into a 24p project and did the same thing I got the desired result.


Tom - I did not see a circle in the corner of the icon. Not sure what you mean by the browser. Do you mean in the dock or is that somewhere else?


May 12, 2021 6:47 AM in response to Luis Sequeira1

What I meant to say was: Were you expecting it to be in slomo when it was put in a 60p project?


The QT player used to play these clips in slomo. but it seems to have stopped doing that. I only have one clip from a Sony camera, XAVC MXF that has a 23.98 frame rate, but plays in slomo everywhere. The slomo is embedded in the recording. It looks great and has no problems with applications fudging frame rates,

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Sony A7S III 4K 120 FPS imports at 60 FPS

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