Here’s the checklist to start with:
- Which video output is the control monitor connected to?
It should be connected to your dedicated graphics card. - Which graphics card is rendering?
It should be your main dedicated graphics card.
You can check this under: Output -> Show Display Info, the details will appear in the top left corner of the screen. - What is the video codec of the clip (e.g., mov dxv3 @25)?
It is highly recommended to use the native DXV3 codec.
Technically, you can use H.264, MJPEG, HAP, ProRes, but stable performance is only guaranteed with DXV3. - What is the frame rate of the video clip (frames per second)?
Refer to the last point. - What FPS is set in the project settings?
Refer to the last point. - What is the signal format being received (if a capture card is used)?
Refer to the last point. - What frequency is set on the video card outputs (e.g., 50Hz)?
Refer to the last point. - What frequency is set on the control monitor (e.g., 50Hz)?
From points 4 to 8, all frequencies and frame rates should be divisible by a common denominator!
- Frame rate of the video clip.
- Frame rate in the project settings.
- Frequency of the input signal on the capture card.
- Frequency on the video card outputs (monitors/displays/processors/sending cards).
- Frequency on the control monitor.
All these points are crucial!
EXAMPLE:
If you are using cameras that operate at 1080p @50, then all the points listed above should be divisible by 50Hz. Monitors should be set to 50Hz, content should be at 50 and 25 fps accordingly.