ffmpeg常用操作命令

添加音轨

ffmpeg -i input.mp4 -i cc.MP3 -c:v copy -c:a aac -map 0:v -map 1:a -shortest output.mp4

并行合并多个视频

ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -filter_complex "[0:v][0:a][1:v][1:a][2:v][2:a][3:v][3:a]concat=n=4:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" -c:v h264_qsv -c:a aac output.mp4

混音以及调节音量

ffmpeg -i input.mp4 -i cc.MP3 -i bgmusic.mp3 -filter_complex "[1:a]volume=2.0[a];[2:a]volume=0.3[b];[a][b]amix=inputs=2:duration=shortest:dropout_transition=2[outa]" -map 0:v -map "[outa]" -c:v copy -c:a aac -shortest output.mp4

按长的来
ffmpeg -i input.mp4 -i cc.MP3 -i bgmusic.mp3 -filter_complex "[1:a]volume=2.0[a];[2:a]volume=0.3[b];[a][b]amix=inputs=2:duration=longest:dropout_transition=2[outa]" -map 0:v -map "[outa]" -c:v copy -c:a aac -shortest output.mp4

并行合并多个视频（去音轨)

ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -filter_complex "[0:v][1:v][2:v][3:v]concat=n=4:v=1:a=0[outv]" -map "[outv]" -c:v h264_qsv -q:v 19 output.mp4

横屏转为竖屏（竖屏改尺寸也可以用）

ffmpeg -i input.mp4 -vf "scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black" -c:v libx264 -c:a copy output.mp4

裁剪合并视频

ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v0];[1:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v1];[2:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v2];[3:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v3];[v0][0:a][v1][1:a][v2][2:a][v3][3:a]concat=n=4:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" -c:v libx264 -c:a copy output.mp4

给视频添加水印(两种都可以用)

																		坐标
ffmpeg -i input.mp4 -i watermark.png -filter_complex "[0:v][1:v]overlay=0:0" -c:v libx264 -c:a copy output.mp4

ffmpeg -i input.mp4 -vf "movie=watermark.png[watermark1];[in][watermark1]overlay=0:0" -y output.mp4

添加更改尺寸以及添加水印

ffmpeg -i input.mp4 -i watermark.png -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v];[v][1:v]overlay=0:0" -c:v libx264 -c:a copy output.mp4

添加字幕

ffmpeg -i input.mp4 -vf "subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=50" -c:v h264_qsv -q:v 19 -c:a copy -t 50 test.mp4

连续指令

ffmpeg -i input.mp4 -i watermark.png -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v];[v][1:v]overlay=0:0" -c:v libx264 -c:a copy -f nut - | ffmpeg -y -i - -vf "subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=50" -c:v h264_qsv -q:v 19 -c:a copy -t 50  output.mp4

连续指令并合成音轨

ffmpeg -i input.mp4 -i watermark.png -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v];[v][1:v]overlay=0:0" -c:v libx264 -c:a copy -f nut - | ffmpeg -y -i - -i cc.MP3 -vf "subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=50" -c:v h264_qsv -q:v 19 -c:a copy -map 0:v -map 0:a -map 1:a -t 50  output.mp4

推荐
ffmpeg -i input.mp4 -i watermark.png -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v];[v][1:v]overlay=0:0" -c:v libx264 -c:a copy -f nut - | ffmpeg -y -i - -i cc.MP3 -vf "subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=50" -c:v h264_qsv -q:v 19 -c:a copy -map 0:v -map 1:a -t 87  output.mp4

终极指令

(1)

ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -i watermark.png -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v0];[1:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v1];[2:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v2];[3:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v3];[v0][0:a][v1][1:a][v2][2:a][v3][3:a]concat=n=4:v=1:a=1[outv][outa];[outv][4:v]overlay=0:0[out]" -map "[out]" -map "[outa]" -c:v libx264 -c:a aac -movflags +faststart -f nut - | ffmpeg -y -i - -i cc.MP3 -vf "subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=100" -c:v h264_qsv -q:v 19 -c:a copy -map 0:v -map 1:a -t 87 output.mp4

(2)推荐

ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -i watermark.png -filter_complex "[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v0];[1:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v1];[2:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v2];[3:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v3];[v0][0:a][v1][1:a][v2][2:a][v3][3:a]concat=n=4:v=1:a=1[outv][outa];[outv][4:v]overlay=0:0[out]" -map "[out]" -map "[outa]" -c:v libx264 -c:a aac -movflags +faststart -f nut - | ffmpeg -y -i - -i cc.MP3 -i bgmusic.mp3 -filter_complex "[0:v]subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=100'[v];[1:a]volume=2.0[a];[2:a]volume=0.3[b];[a][b]amix=inputs=2:duration=longest:dropout_transition=2[outa]" -map "[v]" -map "[outa]" -c:v h264_qsv -q:v 19 -c:a aac -t 80 output.mp4

ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -i watermark.png -filter_complex "
[0:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v0];[1:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v1];[2:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v2];[3:v]scale=720:-1,pad=720:1280:(720-iw)/2:(1280-ih)/2:black[v3];
[v0][0:a][v1][1:a][v2][2:a][v3][3:a]concat=n=4:v=1:a=1[outv][outa];[outv][4:v]overlay=0:0[out]" -map "[out]" -map "[outa]" -c:v libx264 -c:a aac -movflags +faststart -f nut - | ffmpeg -y -i - -i cc.MP3 -i bgmusic.mp3 -filter_complex "[0:v]subtitles=src.srt:force_style='fontname=黑体,fontsize=8,primarycolour=&Hffffff,OutlineColour=&h00222222,outline=1,Alignment=2,MarginV=100'[v];[1:a]volume=2.0[a];[2:a]volume=0.3[b];[a][b]amix=inputs=2:duration=longest:dropout_transition=2[outa]" -map "[v]" -map "[outa]" -c:v h264_qsv -q:v 19 -c:a aac -t 80 output.mp4

# 更改这样的尺寸合并不会错
ffmpeg -i input.mp4 -vf "scale=720:1280,setsar=1:1" output.mp4

# 设置立体声以及采样频率为 44100HZ
ffmpeg -i input1.mp4 -i music/cc.MP3 -i bgmusic.mp3 -filter_complex "[1:a]volume=2.0[a];[2:a]volume=0.3[b];[a][b]amix=inputs=2:duration=longest:dropout_transition=2[outa]" -map 0:v -map "[outa]" -c:v copy -c:a aac -ar 44100 -ac 2 -shortest output.mp4
   
#更改尺寸以及采样频率 帧率为30                        
ffmpeg -i video2.mp4 -vf "scale=720:1280,fps=30" -c:v libx264 -preset medium -crf 23 -c:a copy -ar 44100 -ac 2 output.mp4

合并两个相同的视频（光速合并）
ffmpeg -f concat -safe 0 -i input.txt -c copy output.mp4

input.txt写法:
file 'video1.mp4'
file 'video2.mp4'

剪辑横版视频

ffmpeg -i input.mp4 -vf "crop=ih*9/16:ih,scale=720:1280" -c:a  copy output.mp4
# 转竖版加速
ffmpeg -i input.mp4 -vf "crop=ih*9/16:ih,scale=720:1280" -c:v h264_qsv -c:a aac output.mp4

把视频切割成1分钟

ffmpeg -i input.mp4 -c copy -f segment -segment_time 60 -reset_timestamps 1 output_%03d.mp4

转竖版并切割1分钟

ffmpeg -i input.mp4 -vf "crop=ih*9/16:ih,scale=720:1280" -c:v h264_qsv -c:a aac output.mp4 && ffmpeg -i output.mp4 -c copy -f segment -segment_time 60 -reset_timestamps 1 video/output_%03d.mp4

解决windows添加文字水印问题

ffmpeg -y -i input.mp4 -vf "drawtext=text='总裁三代单传,你大爷的':x=(w-text_w)/2:y=200:fontsize=50:fontcolor=white:borderw=2:bordercolor=black:fontfile=方正粗黑宋简体,drawtext=text='没想到她生了个孩子':x=(w-text_w)/2:y=250:fontsize=50:fontcolor=yellow:borderw=2:bordercolor=black:fontfile=方正粗黑宋简体,drawtext=text='老爷子放话：给我死劲宠':x=(w-text_w)/2:y=300:fontsize=50:fontcolor=yellow:borderw=2:bordercolor=black:fontfile=方正粗黑宋简体" -c:a copy -t 20 output1.mp4


*** fontfile如果要加载字体，必须fontfile='yhct.ttf'，加引号并且不能用中文