Hello, Mi fans,
You’ve probably stumbled upon an incredible work of time-lapse where you just couldn’t get the images and the feelings out of your head. Possibly you are fascinated by nature and the slow changes that occur over a period of time. A flower blooming, a sunset or a moonrise. Maybe it was a construction project or a cityscape at night, full of activity and production. In this thread, we will discuss the time-lapse photography and look forward into how to use the time lapse feature in MI phone, But before let's take a look on
-> What is Time Lapse Photography?
Time-lapse photography is a technique whereby the frequency at which film frames are captured (the frame rate) is much lower than that used to view the sequence. When played at normal speed, time appears to be moving faster and thus lapsing. For example, an image of a scene may be captured once every second, then played back at 30 frames per second; the result is an apparent 30 times speed increase. In a similar manner, the film can also be played at a much lower rate than it was captured at, slowing down fast action, as slow motion or high-speed photography. Processes that would normally appear subtle to the human eye, e.g. the motion of the sun and stars in the sky or plant growth, become very pronounced. Time-lapse is the extreme version of the cinematography technique of undercranking.animation is a comparable technique; a subject that does not actually move, such as a puppet, can repeatedly be moved manually by a small distance and photographed; the photographs can be played back as a film, showing the subject appearing to move.
-> How Time Lapse works?
The film is often projected at 24 frame/s, meaning 24 images appear on the screen every second. Under normal circumstances, a film camera will record images at 24 frame/s. Since the projection speed and the recording speed are the same, t. Even if the film camera is set to record at a slower speed, it will still be projected at 24 frames/s. Thus the image on screen will appear to move faster.
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The change in speed of the onscreen image can be calculated by dividing the projection speed by the camera speed.
So a film recorded at 12 frames per second will appear to move twice as fast. Shooting at camera speeds between 8 and 22 frames per second usually falls into the undercranked fast motion category, with images shot at slower speeds more closely falling into the realm of time-lapse, although these distinctions of terminology have not been entirely established in all movie production circles.The same principles apply to video and other digital photography techniques. However, until very recently[when?], video cameras have not been capable of recording at variable frame rates.Time-lapse can be achieved with some normal movie cameras by simply shooting individual frames manually. But greater accuracy in time-increments and consistency in exposure rates of successive frames are better achieved through a device that connects to the camera's shutter system (camera design permitting) called an intervalometer.
-> Short & Long Exposure time lapse
As mentioned above, in addition to modifying the speed of the camera, it is important to consider the relationship between the frame interval and the exposure time. This relationship controls the amount of motion blur present in each frame and is, in principle, exactly the same as adjusting the shutter angle on a movie camera. This is known as "dragging the shutter".
A film camera normally records images at twenty-four frames per second. During each 1/24th of a second, the film is actually exposed to light for roughly half the time. The rest of the time, it is hidden behind the shutter. Thus exposure time for motion picture film is normally calculated to be one 48th of a second (1/48 second, often rounded to 1/50 second). Adjusting the shutter angle on a film camera (if its design allows), can add or reduce the amount of motion blur by changing the amount of time that the film frame is actually exposed to light.
In long exposure time-lapse, the exposure time will approximate the effects of a normal shutter angle. Normally, this means the exposure time should be half of the frame interval. Thus a 30‑second frame interval should be accompanied by a 15‑second exposure time to simulate a normal shutter. The resulting film will appear smooth.The exposure time can be calculated based on the desired shutter angle effect and the frame interval with the equation:
-> High-dynamic-range (HDR) time-lapse
Time-lapse can be combined with techniques such as high-dynamic-range imaging. One method to achieve HDR involves bracketing for each frame. Three photographs are taken at separate exposure values (capturing the three in immediate succession) to produce a group of pictures for each frame representing the highlights, mid-tones, and shadows. The bracketed groups are consolidated into individual frames. Those frames are then sequenced into the video.
-> How to use time-lapse feature in Mi Phone
Step 1 -> Find and click on the camera icon from your app tray
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Step 2 -> Click on the Video button
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Step 3 -> Click on options and select time lapse
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Record the time-lapse video and to turn the time lapse mode off click on on the off button
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Hope you guys find this thread useful please let me know in the comments!