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Visualizaçõeshow to define overlay video position and size ffmpeg electronJS?
function overlayMaker(){
ffmpeg()
.on('end', onEnd )
.on('progress', onProgress)
.on('error', onError)
.input(`${QuizicorderDir}/screen.webm`)
.input( `${QuizicorderDir}/webcam.webm`)
.complexFilter([
"[0:V]scale=1920:-4,pad=0:1080:0:(oh-ih)/2[vid];[vid][1:V]overlay"
])
.outputFps(30)
.output('./output-video.mp4')
.run();
}
I am using this function to create an overlay of the webcam video on top of the screen recorder video. I have defined the input file path to be the temp folder in windows as i am saving the recording there temperory.
The following image is the desired output
and the output that i am getting is the following
·
Juan Pablo Isaza
1 Respostas
Responde à pergunta0
The overlay filter only specifies where to place the overlaid video and not its size. So, if it is not in the desired dimension, you need to pre-scale it explicitly. Try
"[0:v]scale=1920:-4,pad=0:1080:0:(oh-ih)/2[vid];
[1:v]scale=w:h[ovly];
[vid][ovly]overlay=x:y"
Substitute w,h,x, & y with desired width, height, and (x,y) upper-left placement of the overlay video.
·
Juan Pablo Isaza
Relatório
Responde à pergunta