install go get github.com/jjunk1989/go-ffmpeg-web use go build -i use ffmpeg cmd line ffmpeg -t 5 -ss 00:00:00 -i test.gif -i test.mp3 -c:v libx264 -c:a aac -strict -2 -b:a 128k -vf scale=420:-2,format=yuv420p out.mp4 powered *gin *ffmpeg