configure -help will prompt the meaning of each compilation parameter. Generally speaking, libavformat, libavcodec, and libavutil are essential to realize basic audio and video codec functions, We crop the size of the library file by enabling or disabling the components supported by ffmpeg, such as codec, demuxer, muxer, parser, protocol types, etc. Such as remove the image block artifact.īefore compiling the ffmpeg source code, we can choose whether to compile and generate the above library by configuring the compilation parameters. It is a simple algorithm for synchronization and time calculation, used for post effect production and audio or video application post-processing. It is used for transcoding the original audio format. It realizes original video format conversion, used for video scene scaling, color mapping conversion, image color or space or format conversion, such as conversion between rgb565 and yuv420, rgb888 and yuv420. Preset audio and video encoding and decoding formats, etc. It is a utility library to aid portable multimedia programming., such as arithmetic operations and character operations. It is used for the development of audio and video filters, the development of audio and video filters, such as aspect ratio, cropping, formatting, and non-formatting scaling. Operate audio and video capture or output devices commonly used in computers. It is used for hardware acquisition, acceleration, and display. It is a core that used for various types of audio/image encoding and decoding, and realized most of the decoder functions available on the market. It is an audio and video format analysis protocol that provides independent audio or video data rate sources for libavcodec to analyze the data rate.

It is used for the generation and analysis of audio and video packaging formats, including functions such as obtaining information required for decoding to generate decoding context structure and reading audio and video frames The raw ffmpeg library contains the following:

Application Reference Application ReferenceįFMPEG COMPILATION AND CROPPING INSTRUCTION.

Ffmpeg examples crop