Ffmpeg tanscoding transcoding

The basic principle of transcoding is decoding before encoding
For audio transcoding, please refer to opus to aac
Video transcoding can be referred to ： The simplest basis FFmpeg Examples of memory read and write ： Memory transcoder _ LeiXiaoHua (leixiaohua1020) The column -CSDN Blog _qmin What does that mean?

  Transcoding here is increased filter.

  There is a flow chart on the Internet FFmpeg Example transcoding -transcoding - Simple books
There can be no filter Direct transcoding , increase filter That is to say decode Of buffer To operate , And then code it
filter Use flow chart ：https://blog.csdn.net/fdsafwagdagadg6576/article/details/122931916

ffmpeg transcode (ffmpeg Transcoding procedure )_newchenxf The column -CSDN Blog _ffmpeg transcode