First of all, it should be noted that, without exception, all modern digital video cameras use certain compression algorithms and compression of the original video, and the “recording format” just characterizes the compression algorithms used. Let’s see what recording formats are found today in standard-resolution digital video cameras; we will talk about high-resolution video cameras separately, a little later.
DV is a video format with frame-by-frame compression (compression), that is, each frame of the video is compressed individually. At the same time, the compression ratio can be variable within the same frame — areas of the image that are difficult to compress are compressed with a lower compression ratio, and simple ones with a larger one. In this case, the total compression ratio for the entire frame remains constant (5: 1). The resulting stream for video is approximately 25 Mbps. The DV frame size is fixed and is (for the PAL standard) 720×576 pixels. This format is used in miniDV camcorders, and video recording, respectively, is performed on miniDV cassettes. Continue reading
If you decide to buy a camera by the summer, and decide that this camera must be highly accurate, then the main choice that confronts you is the choice of camera type. Today, the world is dominated by five main classes of digital video cameras, which differ from each other in information carriers.
The camcorder has already become as ordinary a home media device as the TV
Here they are – recording on MiniDV tapes, on a DVD-ROM, on a hard drive, on a flash memory card, and finally on a flash memory such as SSD.
Aspect ratio and aspect ratio for various video formats Continue reading