What is the concept of smooth and slow shooting with digital camera?

"Smooth and slow shooting" is actually "ultra-high frame rate shooting". I'm sure you've seen the close-up of "Bullets Out of the Chamber" in movies and TV. A bullet with an initial velocity of 500 m/s leaves the gun bore in an instant, but the camera releases the moment when the bullet flies out of the barrel in slow motion. This is the application of "smooth slow shooting", that is, ultra-high frame rate shooting. Shoot at an ultra-high frame rate (such as 500fps), and then slow down to the normal frame rate (24-30fps).

The frame rate of steady and slow shooting (100fps or even higher) is much higher than the general frame rate (24, 25, 29.97, 30fps)!

However, this function of low-priced cameras in the general market is difficult to be perfect. Here are some summaries:

1, generally low-priced machines on the market, the frame rate of steady and slow shooting is not particularly high, such as Sony's various cameras/digital cameras, but it is only 100fps (the so-called 200fps transmitted by the network is deceptive). However, it can also be understood that it does not need to be too high for general use.

2. The shooting time is locked. For example, after pressing the record key, the fact that you record 3 seconds (not too long or too short, just 3 seconds) at the frame rate of 100fps, and then generate a video file of 12 seconds (strictly speaking, it is1/24 frames per second).

3. Don't focus when shooting. (At least my computer does.)

4, you can't record, so if you make a video, you have to dub it yourself in the future. You know, it's fun to play sound at four times the speed of regular recorded sound!

5. The definition is not flattering, so that the function of "steady shooting and slow shooting" has actually become a gimmick: my camera is fine, and it is 1440× 1080 (which will be converted into 1920× 1080 later, which is slightly painful). A few days ago, JVC released a JVC PX 100 camera, claiming that its steady and slow shooting can reach 600fps. What's hateful is that JVC doesn't explain what resolution the film made at 600fps is! If the attractive 600fps is matched with 1024×576 or even lower resolution, don't buy it!