Problem with Sony FX3 + Atomos Ninja

[Tong0615]

I'm on a shooting now with a Sony FX3 and Atomos Ninja external recorder, all the images are recorded in the external Ninja recorder. I'm using a Zaxcom Nomad, TC comes from external tentacle sync, one is feeding my recorder and a second one feeding the camera. However, the editing room reported the image and sound were frequently out of syn, the offset was not constant, it varies from -12 frames to +10 frames. 

 

Has anyone had similar experiences with this combination?

[OB1]

This won't be of any help, but I cringe when I see the cam dept listing an FX3 for a shoot for reasons like this, amongst others...

[Philip Perkins]

And of course those sync issues are the sound dept.'s fault, right?    In this sort of situation I gently remind the posties that my audio files were recorded vs. a very accurate and very consistent clock, so your sync issues must be caused by the (gasp!) camera?

 

[Dan Brockett]

How were you feeding TC into the FX3? Via the Tentacle to FX3 Micro USB input or via LTC from the Tentacle to the FX3's audio input or to the Ninja V's analog audio input? 

[Mungo]

On 10/27/2024 at 6:38 PM, Philip Perkins said:

And of course those sync issues are the sound dept.'s fault, right?    In this sort of situation I gently remind the posties that my audio files were recorded vs. a very accurate and very consistent clock, so your sync issues must be caused by the (gasp!) camera?

 

 

Use the LTC "USB style" input of the FX3. If you have done so, everything correct and for me it seems like they didn't extract the TC properly from the HDMI stream provided by the FX3. Possibly a wrong setting in the Atomos or camera or both.

There may also be an accuracy in this setup, but constant and only 2 or 3 frames, caused by the camera.

[Tong0615]

On 10/28/2024 at 11:04 PM, Dan Brockett said:

How were you feeding TC into the FX3? Via the Tentacle to FX3 Micro USB input or via LTC from the Tentacle to the FX3's audio input or to the Ninja V's analog audio input? 

TC was feeding into the FX3 via micro-USB Cable, but there's a splitter box between tentacle and FX3 because the 1AC needs to roll camera via Remote, the remote signal also goes into the micro USB (so the TC and Remote went into splitter box, and then into the micro USB port). After 4 shooting days, the production had to replace the FX3 with an FX6 due to a latency problem for the 1AC, which caused problems with getting the picture in focus. With the FX6 BNC TC Input, timecode was fine for the rest of the project.