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| //https://github.com/tqk2811/FFmpegArgs | |
| FFmpegArg ffmpegArg = new FFmpegArg(); | |
| var colorInput = new FilterGraphInput(); | |
| colorInput.FilterGraph.ColorFilter().Size(new Size(width,height)).Color(Color.Transparent); | |
| var colorVideo = ffmpegArg.AddVideoInput(colorInput,1,0); | |
| var colorMap = colorVideo.ImageMaps.First(); | |
| List<ImageMap> maps = new List<ImageMap>(); | |
| foreach(var input in inputs) | |
| { | |
| var videoMap = ffmpegArg.AddVideoInput(new VideoFileInput(input.FileName),1,0); | |
| var imageMap = videoMap.ImageMaps.First(). | |
| .ScaleFilter()//scale save ratio | |
| .W($"if(gte(iw/ih,{width}/{height}),min(iw,{width}),-1)") | |
| .H($"if(gte(iw/ih,{width}/{height}),-1,min(ih,{height}))").MapOut | |
| .SetSarFilter().Ratio("1/1").MapOut | |
| .OverlayFilterOn(colorMap) | |
| .X("(main_w - overlay_w)/2") | |
| .Y("(main_h-overlay_h)/2") | |
| .EofAction(EofAction.EndAll).MapOut//center | |
| maps.Add(imageMap); | |
| } |
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