What are Video Frame Rates?
Video frame rates state how many frames are captured or presented each second; common values include 24, 25, 30, 50, and 60 fps. Frame rate affects motion, timing, bandwidth, and processing cost.
How Video Frame Rates work
A frame rate is interpreted together with timestamps and a time base, so it is not always a single integer attached to a file. Constant-rate media spaces pictures at a regular cadence, while variable-rate media allows intervals to change between frames. Capture cadence affects motion portrayal and exposure; presentation cadence affects display scheduling and synchronization. Frame-rate handling crosses acquisition, editing, encoding, packaging, and playback.
Key facts
- Fractional rates are commonly represented as rational values rather than rounded decimals; rounding them during long-form processing can accumulate timing and synchronization drift.
- For variable-rate media, an average frame rate cannot reconstruct the timeline; editing and playback must honor the presentation timestamp assigned to each frame.
- Rate conversion by dropping or duplicating frames changes motion cadence, while motion interpolation invents intermediate images and can introduce warping around moving edges.
When Video Frame Rates matter
Preserve the source rate when conversion offers no clear delivery or creative benefit. Converting between incompatible rates can duplicate or drop frames, causing judder or synchronization problems.