FFMpeg filter

1 filter Use  

Liu Qi ：FFmpeg Filter Deep application _LiveVideoStack-CSDN Blog
ffmpeg Study two ：《FFmpeg Basics》 Reading notes （ On ）_ Sunshine glass -CSDN Blog _ffmpeg book
android End use FFmpeg Cut video 、 Transcoding and adding watermark _ Xu Fuji 456-CSDN Blog _android ffmpeg watermark

2  filter Realization

  The simplest basis FFmpeg Of AVfilter Example （ Watermark overlay ）_ LeiXiaoHua (leixiaohua1020) The column -CSDN Blog _ffmpeg Watermark overlay

ffmpeg filter filter Basic examples and comprehensive analysis _newchenxf The column -CSDN Blog _ffmpeg filter 

  This picture seems incomplete , The lack of create graph. 
filter Missing function flowchart

3 filter Algorithm

rotate 90 degree ： Is the corresponding point from src copy to dst
Graphic, YUV420 data format _jefry_xdz The column -CSDN Blog _yuv420

Direct manipulation yuv. Understood as a load logo yuv Replace the data in the upper left corner of the original figure yuv data .

Two 、 stay ffmpeg When transcoding, the watermark is embedded _ Lonely sugar triangle -CSDN Blog _ffmpeg Digital watermark

operation yuv:FFmpeg Source code analysis ： Introduction to video filter ( On )_ Xu Fuji 456-CSDN Blog

Use mathematical calculation operations yuv：FFmpeg Source code analysis ： Introduction to video filter ( Next )_ Xu Fuji 456-CSDN Blog

4 Related to the source code

libswcale Stretch horizontally first , Rear vertical stretch

FFmpeg Simple analysis of source code ：libswscale Of sws_scale()_ LeiXiaoHua (leixiaohua1020) The column -CSDN Blog _bad dst image pointers

Spare materials ：FFmpeg Source code analysis ： Introduction to audio filter ( On )_ Xu Fuji 456-CSDN Blog
FFmpeg Source code analysis ： Introduction to audio filter ( Next )_ Xu Fuji 456-CSDN Blog