ffmpeg 命令哪位大哥帮我看下。

逆风而上

D:\源码\视频处理\ffmpeg\ffmpeg.exe -i C:/Users/Administrator/Desktop/新建文件夹/123.mp4 -i C:\Users\Administrator\Desktop\背景1.jpg -filter_complex "[1:v]scale=iw:ih,setsar=1[bg]; [0:v]scale=min(iw*min(ih/H,iw/W),W*min(ih/H,iw/W)):-2,setsar=1[v]; [bg][v]overlay=(W - w)/2:(H - h)/2" -c:v libx264 -pix_fmt yuv420p -y C:\Users\Administrator\Desktop\新建文件夹\图片.mp4


一直提示这个错误 “[Parsed_scale_2 @ 000001c16e439140] Invalid size 'min(iw*min(ih/H'
[AVFilterGraph @ 000001c16e3a5f00] Error initializing filter 'scale' with args 'min(iw*min(ih/H'
Error initializing complex filters.
Invalid argument”

曦月

试试这个D:\源码\视频处理\ffmpeg\ffmpeg.exe -i C:/Users/Administrator/Desktop/新建文件夹/123.mp4 -i C:\Users\Administrator\Desktop\背景1.jpg -filter_complex "[1:v]scale=1280:720,setsar=1[bg]; [0:v]scale='min(iw*min(ih/720,iw/1280),1280*min(ih/720,iw/1280)):-2':flags=lanczos,setsar=1[v]; [bg][v]overlay=(W-w)/2:(H-h)/2" -c:v libx264 -vf "scale=1280:720,format=yuv420p" -y C:\Users\Administrator\Desktop\新建文件夹\图片.mp4

jialink

你是想实现动态缩放么