How to understand YUV? ffmpeg picture command

YUV 4:2:0 sampling, every four Y shares a set of UV components, representing 2:1 horizontal sampling and vertical 2:1 samplingįor a more detailed definition, please refer to the following link, which is introduced in detail and the interpretation of ffmpeg source code.

YUV 4:2:2 sampling, every two Y share a set of UV components, representing 2:1 horizontal sampling and vertical full sampling.

YUV 4:4:4 sampling, each Y corresponds to a set of UV components, which means complete sampling.

Value and 'U' and 'V' represent chrominance (Chrominance or Chroma), describing the color and saturation of the image, and are used to specify the color of the pixel.Ĭommon YUV samples are YUV444, YUV422, and YUV420:

The 'Y' of YUV represents brightness (Luminance or Luma), which is grayscale. Generally, pictures in the YUV format are not provided for saving, so what is YUV? To put it simply, YUV is similar to the familiar RGB, both of which are color coding methods, but the meaning of their three letters is different from RGB. under our saved pictures are stored in RGB by default. It changes the three color channels of red®, green (G), and blue (B) and their mutual The superposition between them to get a variety of colors, and the formats png, jpg, etc. Regarding RGB, its color mode is a color standard in the industry. Speaking of pictures, the most common one is RGB. It mainly summarizes the commands for the pictures and videos themselves, but before that, I want to summarize some related introductions of pictures and videos. In addition to the audio-related parameters, this article will not have audio-related operations or detailed analysis. FFmpeg is developed under the Linux platform, but it can also be compiled and run in other operating system environments. In order to ensure high portability and codec quality, many codecs in libavcodec are developed from scratch. It contains a very advanced audio/video codec library libavcodec. ffmpeg video stream optimization directionįFmpeg is an open source and free cross-platform video and audio streaming solution.

Ffmpeg concat video from images yuv