ffmpeg

dnf install -y --nogpgcheck https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm -E %rhel).noarch.rpm
dnf install -y --nogpgcheck https://dl.fedoraproject.org/pub/epel/epel-next-release-latest-$(rpm -E %rhel).noarch.rpm

dnf install -y --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-$(rpm -E %rhel).noarch.rpm
dnf install -y --nogpgcheck https://mirrors.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-$(rpm -E %rhel).noarch.rpm

dnf update

dnf config-manager --set-enabled crb
dnf install epel-release epel-next-release

dnf install -y ffmpeg ffmpeg-devel

ffmpeg -version
ffprobe -version

yum install yasm x264-devel zlib-devel -y

wget http://www.ffmpeg.org/releases/ffmpeg-5.1.2.tar.gz
tar -zxvf ffmpeg-5.1.2.tar.gz
make clean
./configure --prefix=/usr/local/ffmpeg --enable-gpl --enable-libx264
make
make install

## 如果没有安装上 x264，可以尝试自己编译一个
wget https://code.videolan.org/videolan/x264/-/archive/stable/x264-stable.tar.gz
tar -zxvf x264-stable.tar.gz
./configure --prefix=/usr/local/x264 --enable-shared --enable-static --disable-asm
make
make install

wget http://www.ffmpeg.org/releases/ffmpeg-5.1.2.tar.gz
tar -zxvf ffmpeg-5.1.2.tar.gz
make clean
./configure --prefix=/usr/local/ffmpeg --enable-gpl --enable-libx264 \
  --enable-pthreads \
  --extra-cflags=-I/usr/local/x264/include \
  --extra-ldflags=-L/usr/local/x264/lib
make
make install

wget http://www.ffmpeg.org/releases/ffmpeg-5.1.2.tar.gz
tar -zxvf ffmpeg-5.1.2.tar.gz
make clean
./configure --prefix=/usr/local/ffmpeg --enable-gpl --enable-libx264
make
make install

vi /etc/profile
export PATH=$PATH:/usr/local/ffmpeg/bin
source /etc/profile

## 这个命令声称需要的依赖，但是貌似不是必须执行
yum install autoconf automake bzip2 cmake freetype-devel gcc gcc-c++ git libtool make mercurial pkgconfig zlib-devel x264-devel

## 下面安装的版本太低了
yum update -y
yum install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm -y
yum install http://rpmfind.net/linux/epel/7/x86_64/Packages/s/SDL2-2.0.14-2.el7.x86_64.rpm -y
yum install ffmpeg ffmpeg-devel -y

## 卸载软件
yum remove ffmpeg ffmpeg-devel -y

ffmpeg -version
ffprobe -version

ffprobe -show_streams -v quiet -of json -i <file>

ffmpeg -filters
ffmpeg -formats
ffmpeg -encoders | grep 264
ffmpeg -codecs |grep 264

ffmpeg -y -i output.mp4 -c:v libx264 -pix_fmt yuv420p -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" output1.mp4
## -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" 能解决长宽不能被2整除的问题。

ffmpeg -y -i 1.mov -vf "scale=1920:1080" -pix_fmt yuva444p10le -vendor apl0 -c:v prores_ks -r 30 444.mov
## -c:v prores_ks 带透明通道的视频

ffmpeg -i 1.mp4 -ss 0 -t 5 -c:v libx264 cut.mp4

ffmpeg -y -i 1.png -vf "scale=1920:1080" cut.png
ffmpeg -y -i 1.mp4 -vf "scale=1920:1080" -c:v libx264 cut.mp4

ffmpeg -y \
  -loop 1 -t 5 -i 1.png \
  -loop 1 -t 5 -i 2.png \
  -filter_complex "[0][1]xfade=transition=fade:duration=1:offset=4,format=yuv420p" \
  -c:v libx264 out.mp4

ffmpeg -y \
  -i 3.mp4 \
  -i 4.mp4 \
  -filter_complex "[0][1]xfade=transition=fade:duration=2:offset=3,format=yuv420p" \
  -c:v libx264 out.mp4

ffmpeg -y \
  -i 1.mp4 \
  -i 2.mp4 \
  -filter_complex "[0]trim=start=0:end=5,setpts=PTS-STARTPTS[v0];[v0][1]xfade=transition=fade:duration=2:offset=3,format=yuv420p[video];[0]atrim=start=0:end=5[a0];[a0][1]acrossfade=44100:2:1:c1=tri:c2=tri[audio]" \
  -map "[video]" \
  -map "[audio]" \
  -movflags +faststart \
  -c:v libx264 \
  -c:a aac \
  out.mp4
## 音频视频分开处理

ffmpeg -y \
  -i 1.mp4 \
  -i 1.mov -ss 0 -t 15 \
  -filter_complex "[0][1]overlay=0:0,format=yuv420p[video];[0]volume=2[a0];[1]atrim=start=0:end=15,volume=0.3[a1];[a0][a1]amix=inputs=2:duration=longest[audio]" -map "[video]" \
  -map "[audio]" \
  -movflags +faststart \
  -c:v libx264 \
  -c:a aac \
  output.mp4
## overlay=0:0 视频遮盖

ffmpeg -y \
  -i t1.mp4 \
  -i 444.mov -ss 0 -t 15 \
  -filter_complex "[1]boxblur=10[v1];[0][v1]overlay=0:0,format=yuv420p[video];[0]volume=2[a0];[1]atrim=start=0:end=15,volume=0.3[a1];[a0][a1]amix=inputs=2:duration=longest[audio]" -map "[video]" \
  -map "[audio]" \
  -movflags +faststart
  -c:v libx264 \
  -c:a aac \
  output.mp4
## boxblur=10 模糊效果

ffmpeg -y \
  -i 1.mp4 \
  -i 2.mp4 \
  -filter_complex "\
  [1]format=yuva444p,colorchannelmixer=aa=0.5[v1];\[0][v1]overlay=0:0,format=yuv420p" \
  -c:v libx264 \
  -c:a aac \
  output.mp4
## format=yuva444p 为视频提供了透明通道

ffmpeg -y \
  -i 2.mp4 \
  -i 1.mp4 \
  -filter_complex "\
  [1]format=yuva444p,colorchannelmixer=aa=0.5,setpts=PTS-STARTPTS+(2/TB)[v1];\
  [0][v1]overlay=0:0:enable='between(t,2,4)'[video];\
  [0]volume=0.2[a0];\
  [1]adelay=2000|2000[a1];\
  [a0][a1]amix[audio]\
  " \
  -map "[video]" \
  -map "[audio]" \
  -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 output.mp4
## setpts=PTS-STARTPTS+(2/TB) 视频延迟 2 两秒
## :enable='between(t,2,4)' 设置得加的时间段
## adelay=2000|2000 竖线两侧表示两个声道，延迟2000毫秒

ffmpeg -y \
  -i 1.mp4 \
  -filter_complex "[0]setpts=0.5*PTS[video];[0]atempo=2.0[audio]" \
  -map "[video]" -map "[audio]" \
  -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 output.mp4

## hflip 垂直轴；vflip 水平轴
ffmpeg -y \
  -i 1.mp4 \
  -filter_complex "[0]hflip" \
  -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 output.mp4

ffmpeg -y -i 1.mp4 -ss 00:00 -f image2 -vframes 1 -vf scale=540x960 g1.jpg
ffmpeg -y -i 2.mp4 -ss 00:00 -f image2 -vframes 1 -vf scale=540x960 g2.jpg

ffmpeg -y -i g%d.jpg -vf palettegen palette.png

ffmpeg -y -framerate 2 -f image2 -i g%d.jpg -i palette.png -lavfi scale=540x960,paletteuse -loop 0 output.gif

# 比较费电
ffmpeg -re -stream_loop -1 -i a.mp4 -c:v libx264 -c:a aac -f rtsp rtsp://192.168.2.200:8554/live_01
# 比较省电
ffmpeg -re -stream_loop -1 -i a.mp4 -c copy -f rtsp rtsp://192.168.2.200:8554/live_01

ffmpeg -i 1.mov -hide_banner

变速

ffmpeg -y -i t1.mp4 -filter:v "setpts=0.1*PTS" -c:v libx264 -c:a aac -r 30 cut.mp4
ffmpeg -y -i t1.mp4 -filter_complex "[0]setpts=0.1*PTS[video];[0]atempo=10.0[audio]" -map "[video]" -map "[audio]" -c:v libx264 -c:a aac -r 30 output.mp4

剪辑对应时间视频
ffmpeg -i 0.mp4 -ss 1000 -t 15 -c:v libx264 cut.mp4

ffmpeg -i 1.mp4 -ss 0 -t 15 -c:v libx264 3.mp4
ffmpeg -i 2.mp4 -ss 0 -t 5 -c:v libx264 4.mp4

视频转码兼容 QuikTime
ffmpeg -y -i output.mp4 -c:v libx264 -pix_fmt yuv420p -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" output1.mp4
-vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" 可以用来兼容不能被二整除的问题

统一素材大小
ffmpeg -y -i 1.png -vf "scale=128:110" 3.png
ffmpeg -y -i 2.png -vf "scale=128:110" 4.png
ffmpeg -y -i 1.mov -vf "scale=1920:1080" -pix_fmt yuva444p10le -vendor apl0 -c:v prores_ks -r 30 444.mov

制作专场，素材需要尺寸统一

图片转场
ffmpeg -y -loop 1 -t 5 -i 3.png -loop 1 -t 5 -i 4.png -filter_complex "[0][1]xfade=transition=fade:duration=1:offset=4,format=yuv420p" -c:v libx264 output.mp4

视频转场
ffmpeg -y -i cut.mp4 -i cut1.mp4 -filter_complex "[0][1]xfade=transition=fade:duration=2:offset=3,format=yuv420p" -c:v libx264 -c:a aac output.mp4

ffmpeg -y -i 3.mp4 -i 4.mp4 -filter_complex "[0][1]xfade=transition=diagbl:duration=2:offset=3,format=yuv420p" -c:v libx264 output.mp4

offset=4 会在指定时间开始淡入淡出效果 类似剪裁了视频
format=yuv420p 用来兼容 QuikTime

ffmpeg -y -i 0.mp4 -i t1.mp4 -filter_complex "[0]trim=start=2000:end=2005,setpts=PTS-STARTPTS[v0];[v0][1]xfade=transition=fade:duration=2:offset=3,format=yuv420p[video];[0]atrim=start=2000:end=2005[a0];[a0][1]acrossfade=44100:2:1:c1=tri:c2=tri[audio]" -map "[video]" -map "[audio]" -movflags +faststart -c:v libx264 -c:a aac output1.mp4



ffmpeg -y -i cut.mp4 -i cut1.mp4 -filter_complex "[0][1]overlay=125:125:alpha=0.6:enable='between(t,0,2)'" -pix_fmt yuv420p -c:v libx264 output.mp4



ffmpeg -y -i 3.mp4 -i 4.mp4 -filter_complex "[1]format=yuva444p,colorchannelmixer=aa=0.5[v1];[0][v1]overlay=0:0,format=yuv420p" -c:v libx264 -c:a aac output.mp4

ffmpeg -y -i t1.mp4 -i 444.mov -ss 0 -t 15 -filter_complex "[1]boxblur=10[v1];[0][v1]overlay=0:0,format=yuv420p[video];[0]volume=2[a0];[1]atrim=start=0:end=15,volume=0.3[a1];[a0][a1]amix=inputs=2:duration=longest[audio]" -map "[video]" -map "[audio]" -movflags +faststart -c:v libx264 -c:a aac output.mp4



ffprobe -select_streams v -show_entries format=duration,size,bit_rate,filename -show_streams -v quiet -of csv="p=0" -of json -i test.mp4

ffprobe -select_streams v -show_entries format=duration,size,bit_rate,filename -show_streams -v quiet -of json -i

ffprobe -show_streams -v quiet -of json -i


缺失音轨的，添加音轨

ffmpeg -y \
 -f lavfi -i anullsrc=r=44100:cl=stereo \
 -i 6232_1666937024.mp4 \
 -filter_complex "[1]trim=start=0:end=5,setpts=PTS-STARTPTS,scale=1080:1920[video];[0]atrim=start=0:end=5[audio]" \
 -map "[video]" \
 -map "[audio]" \
 -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 out1.mp4

匹配视频与音频的时间长度

ffmpeg -y \
 -f lavfi -i anullsrc=r=44100:cl=stereo \
 -i 100.mov \
 -filter_complex "[1]trim=start=0:end=7,setpts=PTS-STARTPTS,scale=1080:1920[video];[0]atrim=start=0:end=7[a0];[1]atrim=start=0:end=7[a1];[a0][a1]amix=inputs=2:duration=longest[audio]" \
 -map "[video]" \
 -map "[audio]" \
 -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 out2.mp4

连接视频

ffmpeg -y \
  -i out1.mp4 \
  -i out2.mp4 \
  -i out1.mp4 \
  -i out2.mp4 \
  -filter_complex "[0:0][0:1][1:0][1:1][2:0][2:1][3:0][3:1]concat=n=4:v=1:a=1[video][audio]" \
  -map "[video]" \
  -map "[audio]" \
  -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 concat.mp4

视频转场

ffmpeg -y \
  -i out1.mp4 \
  -i out2.mp4 \
  -i out1.mp4 \
  -i out2.mp4 \
  -filter_complex "\
  [0][1]xfade=transition=fade:duration=2:offset=4[v1];\
  [v1][2]xfade=transition=fade:duration=2:offset=10[v2];\
  [v2][3]xfade=transition=fade:duration=2:offset=14[video];\
  [0:a][1:a]acrossfade=d=1:c1=tri:c2=tri[a1];\
  [a1][2:a]acrossfade=d=1:c1=tri:c2=tri[a2];\
  [a2][3:a]acrossfade=d=1:c1=tri:c2=tri[audio]\
  " \
  -map "[video]" \
  -map "[audio]" \
  -pix_fmt yuv420p -c:v libx264 -r 30 -c:a aac -ar 44100 output.mp4