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I have an image frame 1920x1080 and a video with the same resolution.

I want to resize video by 80% of its resolution and center it, and then overlay it with image frame. So the final video result is 1920x1080

How i can do that?

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You can try this.

ffmpeg -i input_video -loop 1 -i input_image -t video_duration -filter_complex "[0:v]scale=iw*80/100:ih*80/100[vo];[1:v][vo]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2,setpts=PTS-STARTPTS[outv]" -c:v libx264 -map [outv] output_video

Here you have to use filter_complex and map for overlaying and do the scaling, etc. 0:v refers to the input video and it's width and height being scaled to be 80% of its original. 1:v refers to the input image and it is overlay with the scaled video to the centre of the image. loop will loop the image through out the video duration and -t will limit the duration of the output video to seconds you want.

If you need original audio available in the output video use -map 0:a before specifying the output file.

ffmpeg -i input_video -loop 1 -i input_image -t video_duration -filter_complex "[0:v]scale=iw*80/100:ih*80/100[vo];[1:v][vo]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2,setpts=PTS-STARTPTS[outv]" -c:v libx264 -map [outv] -map 0:a -c:a copy output_video

Hope this will help you!

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