قالب وردپرس درنا توس
Home / Tips and Tricks / These are the slow specifications that you should look for in your next phone «Smartphones :: Gadget Hacks

These are the slow specifications that you should look for in your next phone «Smartphones :: Gadget Hacks



Today, our phones can only display more than 30 frames per second. Phones like the Galaxy S10 can even record with the 4K front camera at 60 frames per second. The slow motion function has recently appeared on more and more devices ̵

1; but as you may have noticed, the quality of the feature differs from phone to phone.

With slow motion, various factors play a role. Specifications that are ignored for average users while recording videos in auto mode. In slow motion, however, these specifications are important to know. Because they determine the performance of the slow motion video, how fast this action can be that slows you down. Unlike regular video, it's not the higher resolution, as there are no resolution options available at some frame rates.

Frame Rate

The most important thing for slow motion capture is frame rate. Slow motion videos are usually created by filmed an object at more than 30 frames per second (frames per second). Then the material is played back at 30 frames per second.

For example, if you record 60 frames per second, the material will play at 30 fps, and you would end up with 1/2 slow motion video. This differs from slowing down the 30fps footage to 1 / 2th speed in post-production, as this would show each image twice and effectively make the video 15 fps – while recording at 60 fps and playing at 30 fps would lead to same 1/2-speed video, but every picture would be a new picture.

So you want a camera with a higher frame rate. This specification is often referred to as "shutter speed" when it applies to still images rather than videos, but it is the same concept. Look for a phone that's at least 240 frames per second and make sure you have 1/4-slow motion when playing at 60 fps or 1/8 when playing at 30 fps. However, some phones can record up to 960 fps (marketed as "super slow motion"), such as the Galaxy S10 or Sony Xperia 1.

Resolution [19659005] The next important specification you should keep in mind is the resolution that records each slow motion setting in, for example, 240 fps at 720p . Capturing slower, higher-resolution clips such as 1080p will capture more detail and improve video quality. With the larger pixel depth, however, there is a larger file that can easily surpass the capabilities of today's smartphones.

Telephone processors need to be energy-efficient to make sure your battery lasts all day, which is usually not the strongest. Processing all the information in real-time, high-definition video becomes even more difficult when you request a 240-times full 2 ​​megapixel photo from the chip. Therefore, most smartphones are limited to 120 frames per second when shooting at 1080p.

Currently, Qualcomm Snapdragon 855 is a preferred processor for Android flagships in 2019. It is a "SoC" or "System on a Chip" processor such as the GPU and image signal processor (ISP) used in videography. While this is a top-of-the-line chip, it is limited to 120 fps at 1080p. It is suitable for both 480 frames per second and 960 frames per second, but only for a limited time at 720p.

This limitation applies to both Apple's A Series and Huawei's Kirin chipsets. Therefore, consider the media on which you share this video. If your audience is watching a larger display like a TV, 720p will not look great on many upgraded to 4K (2160p) models. For a mobile audience, however, 720p does not look nearly as bad.

Duration

Although this is not a hardware specification, the duration of the event is an important consideration for slow motion video. As already mentioned, our phones are not designed for super-slow motion videos. For iPhone users, slow motion videos are limited to 1080p at 240 frames per second. This is all the A12 chipset can record in real time. Therefore, you can record at 1/8-speed up to your internal storage capacity. This also applies to most Android flagships.

But what about super slow motion? This feature is only supported by a handful of Android phones. In the US this is limited to Sony and Samsung. Both companies use a Qualcomm Snapdragon 800 – SoC in their phones and are therefore subject to the same limitations.

Super-Slow-Mo mode. The Galaxy S10 only allows a recording of .4s and .8s, what only switches between 960 and 480 fps.

Super slow motion video is currently enabled by using the DRAM buffer. This buffer temporarily stores uncompressed video that the phone originally used for 480 and 960 fps videos. When the buffer is full, the video stops and the phone converts it into a storable file in internal memory.

This buffer is not that big. Uncompressed super slow motion quickly eats up this limited space. Therefore, with Qualcomm Snapdragon 845 (2018 flagship) you are limited to 0.4 seconds at 480 frames per second and 0.2 seconds at 960 frames per second, both taken at 720p. While the Qualcomm Snapdragon 855 both doubles, we're still talking less than a second.

Stabilization

Even if the duration is limited, capturing an action video is the key to success. When shooting in slow motion, moving the camera body is less noticeable than shooting at 30 frames per second, but it can still ruin a video if the motion is too large.

A contrast to this is video stabilization. Although optical image stabilization helps a bit when it comes to video, electronic image stabilization (EIS) is the bigger factor. In EIS systems, the phone detects movement from your hands and uses that data to re-center the images as they are taken. It's a bit like stabilization tools in video editors, but it's more effective and causes less distortion, as it reacts directly to movements that are detected by your phone's sensors.

The problem is that many phones do not include this in their Super Slow Motion modes. This means that the only available stabilization is OIS, which in turn is not as effective for videos . We therefore strongly recommend that you use a tripod if you know you are taking a lot of super slow motion videos, which is helpful even for normal speed videos.

Aperture

Finally there is aperture. Aperture represents the aperture of the lens aperture through which light is transmitted. Shown as an aperture value (eg, f / 2.2), a lower number corresponds to a larger aperture, which means that more light is detected by the sensor.

Because light is so important when shooting in slow motion, a phone is available. A large iris helps in situations where lighting is not the best. While the high shutter speed limits the amount of light the sensor is exposed to, a higher aperture can help mitigate some by providing a larger opening each time the sensor is opened.

This article was produced during a gadget hack Special reporting on smartphone-based video creator tips for filming and editing. Take a look at the entire Videography series.

Do not miss: Why EIS is actually better than OIS for Videos

Cover Picture and GIFs by Jon Knight / Gadget Hacks

Source link