What is the best resolution for a dash cam?

[LolaLee]

The optimal resolution for a dash cam is 1080P. Compared to other resolutions, 1080P records clearer videos than 720P but is slightly inferior to 1200P. However, higher resolution results in larger video file sizes, with 1200P files being larger than 1080P. Therefore, 1080P is currently the best resolution for dash cams. Dash cams are designed to record driving processes, and the clarity of the recorded video is crucial. The most important performance indicator for video clarity is resolution, which refers to the number of pixels per inch. Thus, the resolution depends on the pixel size. Generally, when the display size of a dash cam is fixed, larger pixels result in higher resolution and clearer images. For dash cam pixels, the front cameras of dual-lens dash cams typically have 5 megapixels or 12 megapixels, while the rear cameras usually have 2 megapixels or 5 megapixels. Clarity is mainly divided into standard definition and high definition, with high-definition dash cams offering resolutions such as 720P, 1080P, and 1200P. The specific resolution can be chosen based on the memory card capacity. Larger capacities allow for higher resolutions. For example, a 16GB memory card can record approximately 200 minutes of video at 720P resolution, but only about 100 minutes at 1080P. Larger memory cards store more videos for longer durations. When purchasing a memory card, it is recommended to choose one with a read/write speed of Class6 or higher, preferably Class10, to ensure better video quality. Additionally, opt for genuine, reputable brands for better quality and reliability.

[Martinez]

After driving for ten years, I've found that the resolution of a dash cam really depends on your needs. 1080P is sufficient for daily use, and license plates can be clearly seen within five meters. However, if you frequently drive on highways or want extra safety, 2K resolution is more reliable, as it provides clearer images when zooming in during emergencies. Especially for night driving, 2K performs significantly better than 1080P in noise control. Just keep in mind that 2K videos take up twice the storage space. I once installed a dual-channel dash cam (front and rear) and needed a 256GB memory card to ensure a week's worth of loop recording. Oh, and don’t forget to check the lens angle—if the field of view is too wide, even high resolution won’t help, as the edges will still appear distorted.

[BenjaminLynn]

I previously researched dashcam specs in detail when helping a friend choose one. From a practicality standpoint, 2K resolution offers the best value. While 4K delivers stunning image quality, it consumes excessive storage space - a 64GB card can only store about six hours of 4K footage. Moreover, many 4K models suffer from severe overheating issues and are prone to crashing under windshields during summer. The key factor is the sensor size - a CMOS sensor larger than 1/2.8 inches paired with 2K resolution delivers significantly better night performance than smaller sensors with 4K. My car uses a Sony IMX335 sensor with 1440P resolution, which still captures clear license plate images on elevated roads during rainy conditions.

[DominicRose]

Compared three different dash cams: the 1080P one performs decently on sunny days, but the license plates of cars ahead get blurry at dusk. The 4K one has fine image quality but the file size is too large, making sudden accident videos prone to being overwritten in the loop. Ended up keeping the 2K resolution one, which can clearly capture license plates 30 meters away while maintaining an acceptable video size. An additional detail: frame rate is more important than resolution—60fps at 1080P captures moments better than 30fps at 4K. Don’t believe the fake 4K hype from sellers; the actual chip processing power can’t keep up.