24p is a video format that records 24 complete progressive frames per second, the frame rate that has defined theatrical cinema since the arrival of sound film in the late 1920s. In video fundamentals, the number stands for the frame rate and the letter p for progressive scan, meaning every frame contains all of its lines rather than two interlaced fields.
In everyday production, 24p is shorthand for the cinematic look of motion: a slight, natural motion blur and a characteristic cadence that audiences associate with feature films and high-end television drama. Many cameras record either true 24.000 fps or 23.976 fps, a variant created for compatibility with broadcast systems based on 60 Hz.
How 24p records motion
At 24 frames per second, each frame represents about 41.7 milliseconds of time. The camera does not expose the sensor for that entire interval; the exposure time per frame is set by the shutter speed or shutter angle, and the gap between exposures is invisible to the viewer. The combination of a relatively low sampling rate and moderate motion blur creates the smooth but slightly discontinuous motion people call the film look.
Film cameras traditionally used a 180-degree rotary shutter, which exposes each frame for half the frame interval. At 24p this equals 1/48 second, and digital cameras usually approximate it with 1/50 second. This guideline, known as the 180-degree rule of shutter angle, gives motion blur that looks natural; much shorter exposures produce choppy, staccato movement, while longer ones smear detail.
| Parameter | Value | Practical meaning |
|---|---|---|
| Frame interval | About 41.7 ms | Time represented by one frame |
| 180-degree shutter | 1/48 s, often set as 1/50 s | Natural motion blur |
| 90-degree shutter | 1/96 s, often 1/100 s | Crisper, more jittery motion |
| 360-degree shutter | 1/24 s | Heavy blur, dreamy or low-light look |
| Variant 23.976p | 24000/1001 fps | Compatibility with 60 Hz broadcast timing |
24p, 23.976p and other frame rates
The 23.976 fps variant exists because color television in North America and Japan runs at 29.97 frames per second, slightly slower than 30. Running film-rate material 0.1 percent slower allows a clean conversion to that broadcast timing. Today, most streaming, television and online deliveries labeled 24p are in fact 23.976, while digital cinema packages commonly use true 24.000 fps.
| Frame rate | Typical use | Motion character |
|---|---|---|
| 24p or 23.976p | Feature films, drama, music videos | Cinematic, visible cadence |
| 25p | Television and online video in 50 Hz regions | Very similar to 24p |
| 30p or 29.97p | Online video, corporate content, some TV | Slightly smoother, less filmic |
| 50p or 60p | Sports, live events, gaming footage | Very smooth, video-like |
| 120p and higher | Slow motion when played back at 24p | Slowed action, frozen detail |
Mixing frame rates in one project causes problems. A single timeline should use one base rate, and footage at other rates should either be planned as slow motion or converted carefully, because frame-rate conversion introduces duplicated or blended frames.
Displaying 24p on screens and broadcasts
Many screens refresh at 60 Hz, which is not a whole multiple of 24. To show 24p on such a display, frames are repeated in an uneven 3:2 pulldown cadence: one frame is held for three refreshes, the next for two. This creates judder, a slight unevenness visible in slow pans. Displays running at 120 Hz or 48 Hz can repeat each frame evenly and avoid this extra irregularity.
| Destination | Conversion method | Side effect |
|---|---|---|
| Cinema projection | Native 24 fps, often flashed two or three times | No conversion artifacts |
| 60 Hz television | 3:2 pulldown | Uneven cadence on pans |
| 50 Hz broadcast | Speed-up to 25 fps | About 4 percent faster, audio pitch adjusted |
| 120 Hz display | Each frame shown five times | Even cadence |
| Streaming platforms | Native 23.976 or 24 fps | Depends on the playback device |
Shooting and editing in 24p
Shooting in 24p requires adapting camera movement and lighting to the low frame rate. Fast pans across detailed scenes produce strobing, so cinematographers follow guidelines that limit pan speed, use longer focal lengths carefully, and let the camera track a subject so the viewer’s eye has something stable to follow.
- Set the shutter to about 1/50 s as a starting point and use ND filters outdoors instead of a faster shutter.
- Pan slowly across detailed backgrounds or follow a moving subject to reduce strobing.
- Match the project frame rate to the camera setting before editing begins.
- Check flicker under artificial light, especially at 50 Hz mains frequency, where 1/50 s is safer than 1/48 s.
- Record audio at the matching timebase so sound stays in sync after conform and delivery.
Limitations and misconceptions
24p is not automatically cinematic. Lighting, lens choice, depth of field, color grading and composition contribute far more to the film look than frame rate alone. Footage shot at 24p with a very short shutter, flat lighting and a wide depth of field still looks like video.
The format also has real limitations. Fast action and sports often look choppy at 24p, which is why live broadcasts use 50p or 60p. Experiments with high frame rate cinema, such as 48 fps releases, showed that many viewers perceive smoother motion as less filmic, which confirms that the appeal of 24p is partly cultural convention rather than technical superiority.
Understanding it simply
Video is a quick series of still pictures. 24p means the camera takes 24 full pictures every second. That is the speed movies have used for almost a century.
Because there are fairly few pictures per second, each one carries a little blur from movement. Our eyes read that mix of blur and steps as the familiar feel of cinema. Faster rates look smoother, but many people find them closer to live TV than to a film.
Applied in practice
A small production team shoots a short drama for streaming. They set the cameras to 23.976 fps with a 180-degree shutter, which gives 1/48 s, and use variable ND filters to keep the aperture at f/2.8 in bright daylight. On interior scenes lit by practical lamps on 50 Hz power, they switch to 1/50 s after noticing faint flicker on a test recording.
For a fast car chase, the director wants a harsher, more nervous feel, so the team shoots those shots at a 90-degree shutter while keeping the frame rate at 23.976. A few slow-motion inserts are recorded at 119.88 fps and conformed to the 23.976 timeline in editing. The finished film is delivered at 23.976p, and on modern televisions with 120 Hz panels it plays with even cadence and the intended cinematic motion.