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Variable-frame-rate video does not give every frame the same duration. Playback follows timestamps rather than assuming a single fixed interval. This can suit screen recordings and other changing material, but editing tools and players must handle the timing correctly to maintain smooth motion and synchronised sound.
Explore guide ↗Frames per second describes how often the video supplies a new picture. Hertz describes how often the display refreshes. A 120Hz screen does not make a 24 fps film contain 120 original pictures each second; the television must repeat or process the available frames.
Explore guide ↗A 24 fps film does not divide evenly into a 60Hz refresh. Repeating some frames longer than others can introduce an uneven cadence, often visible in slow pans. Source judder, display response and motion settings can also contribute, so first identify the actual frame rate and output.
Explore guide ↗Twenty-five frames per second fits evenly into a 50Hz refresh, with each source frame repeated twice. It does not fit evenly into 60Hz without timing conversion. Matching supported output timing can therefore improve cadence for some television material without changing its actual source detail.
Explore guide ↗Both can provide smooth live motion when captured, encoded and displayed well. The difference between 50 and 60 frames per second is only one factor; cadence, compression, camera shutter, stream stability and the display’s output timing can matter more than the larger number.
Explore guide ↗A player changing resolution, refresh rate or dynamic range can trigger a new HDMI negotiation. A short blank screen during that switch can be normal. Repeated dropouts during steady playback, however, deserve a separate connection and compatibility check.
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