X-T3 Slow Motion video - low bitrate

[Chrispello]

As official specifications says, bitrate in 100/120fps and 1080p should be 200 Mbps. However in my case it is only 40 Mbps for 120 fps  and 50 Mbps for 100 fps.

I mostly record in DCI 4K and even if I set maximum 400 Mbps it's just fine. And I don't have any other bitrate problems.

BTW. There is no option to choose bitrate itself when you choose Slow Motion Mode. However it should be way more data than in my video clips.

 

Could anyone please help me solve this problem?

Edited March 19, 2020 by Chrispello
Question added.

[Greybeard]

How are you measuring the bitrate?

If a video clip which takes 5 seconds to shoot at 200Mbps is played back at 4x slow motion (i.e. 20 seconds) then the average bitrate over 20 seconds will be 50Mbps.

[Chrispello]

Damn, it definitely has sense now.

I've completely forgotten that X-T3 slows down videos directly in the camera. And this is the reason why I see lower bitrate in data of my files. Thank you for this quick math private lessons @Greybeard 😉