I can see that too.

If you ask me this has to do with the drone source footage.

It appears from time to time.

It is at previous clips too e.g. the clip with the commuter bike pedals at the first scene already.

1. I imported your "rennrad-2022hildesheim-rtf.mp4" video in Cinelerra-GG
2. RMB (Right Mouse Button) on the thumbnail (Vicon) of the video in Resource window and Match...->Match_all, so the Project Format parameters are like the loaded video.
3. Insert the video in the timeline using Drag and Drop.
4. In the timeline move the pointer to the 00m30s00f.
5. Using "Numpad_1" (Frame forward) to go forward frame by frame: at 30s:25f I see a drop frame.

May be that what I see in the playback on VLC?
If you load your source video (the original footage) in Cinelerra-GG, is there the same frame drop, in the same position?

I tried to follow what you mean but I'm not sure. Maybe you mean minor frame drops?!

If yes, this is caused by the camera logic of the drone. This is - at the development and price level - a drone I can go wild with but which irregularly makes some minor frame drops.

1. Some seconds long drop would be terrible. Facebook made that for my upload. Odd though. Need feedback it anything like that happened. I uploaded it from the Cin H264 Render output

2. Minor irregular frame drops and/or some jelly effects from vibrations - though 3-way mechanical gimbal stabilzation - are within this actual dev to price ratio of the drone - unfortunately.

3. The third thing is the frame to shutter ratio. This can make the image jerky, blurry or cinematic like picture as expected - depending on the movement speed and the used shutter speed.

No. 1 would be terrible. So please give me feedback to make the content available to everybody - as it is intended.

No. 2 is as it is. As long I'm using these quadrocopters of this exact type I own and I'm not changing them to a next generation.

No. 3 will just make very quick sideway moving object appear more "as one object". Is the shutter speed too fast, objects of that kind will appear jerky. Because the aperture at the quadrocopter cannot be reduced I need to reduce the amount of light which is allowed to fall into the lens to achieve a proper cinematic effect.

Hope the ND filter will be here by next weekend. The Roadbike Club at  Goettingen is going to make a great event next weekend. We already have spotted some of the best locations.

May be that are you moving the camera (drone) at a speed greater than shutter speed?

I don't see anything jerky except what i said previously about the shutter speed.

At Facebook I saw a huge hang but Facebook re-encoded the uploaded video. But odd though.

The video is H264 render output of Cin without any additional re-encoding

The bitrate is 16 mbit

Can you check your CPU utilization?

@pierre

Yes the defect is apparent, but most viewers probably won't pay too much attention to it.

That would be people like me -- it is an interesting video just to watch -- and I would not even know there was any defect.  (Just glad it was not a fault of CinGG).

Though I probably used the wrong terms (and cannot edit the topic anymore) it seems you absolutely have understood what I meant.

I need to make the shutter time longer in the future. Therefore I'm awaiting the ordered ND filters.

At high movement the objects become jerky at crispy short shutter times like 1/250

I'm filming at 30 FPS  and I want to set a fixed shutter speed to 50 or 80.(60 isn't available).

There is a 180° degree rule which explains this matter to record movements at cinemalike framerates of 23,97