处理透明背景视频合成

shenrongliang

2025-04-22 15b801d17f486af216bd424383684c88da790df6

处理透明背景视频合成

 yudao-module-digitalcourse/yudao-module-digitalcourse-biz/src/main/java/cn/iocoder/yudao/module/digitalcourse/service/coursemedia/CourseMediaServiceUtil.java

@@ -167,19 +167,22 @@
                        newFileName2 // 输出文件名
                );
            } else if ("2".equals(scene.getHasPerson())) {
                //cover1放在substring1的，让cover1挡住substring1,背景图ppt内容和人像视频不变，只是层级关系修改一下
                // 当没有人像时，视频放在 cover 的下层
                builder = new ProcessBuilder(
                        "ffmpeg",
                        "-i", cover1, // 背景图
                        "-i", cover1, // 背景图 1
                        "-i", substring1, // 视频
                        "-i", cover1, // 背景图 2
                        "-i", cover,  // PPT内容
                        "-i", substring1, // 人像视频
                        "-filter_complex",
                        "[0:v]scale=" + Math.round(scene.getBackground().getWidth()) + ":" + Math.round(scene.getBackground().getHeight()) + "[bg];" +
                        "[1:v]scale=" + Math.round(scene.getComponents().get(1).getWidth()) + ":" + Math.round(scene.getComponents().get(1).getHeight()) + "[v1];" +
                        "[bg][v1]overlay=x=" + Math.round(scene.getComponents().get(1).getMarginLeft()) + ":y=" + Math.round(scene.getComponents().get(1).getTop()) + "[img];" +
                        "[2:v]scale=" + Math.round(scene.getComponents().get(0).getWidth()) + ":" + Math.round(scene.getComponents().get(0).getHeight()) + "[v2];" +
                        "[v2][img]overlay=x=" + Math.round(scene.getComponents().get(0).getMarginLeft()) + ":y=" + Math.round(scene.getComponents().get(0).getTop()),
                        newFileName2
                        "[0:v]scale=" + Math.round(scene.getBackground().getWidth()) + ":" + Math.round(scene.getBackground().getHeight()) + "[bg1];" +
                                "[1:v]scale=" + Math.round(scene.getComponents().get(0).getWidth()) + ":" + Math.round(scene.getComponents().get(0).getHeight()) + "[v1];" +
                                "[bg1][v1]overlay=x=" + Math.round(scene.getComponents().get(0).getMarginLeft()) + ":y=" + Math.round(scene.getComponents().get(0).getTop()) + "[img1];" +
                                "[2:v]scale=" + Math.round(scene.getBackground().getWidth()) + ":" + Math.round(scene.getBackground().getHeight()) + "[bg2];" +
                                "[img1][bg2]overlay=shortest=1[v2];" +
                                "[3:v]scale=" + Math.round(scene.getComponents().get(1).getWidth()) + ":" + Math.round(scene.getComponents().get(1).getHeight()) + "[v3];" +
                                "[v2][v3]overlay=x=" + Math.round(scene.getComponents().get(1).getMarginLeft()) + ":y=" + Math.round(scene.getComponents().get(1).getTop()),
                        newFileName2 // 输出文件名
                );
            }
            System.out.println(newFileName2);