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@@ -0,0 +1,89 @@
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+package api.common.util;
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+
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+import lombok.SneakyThrows;
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+import org.apache.commons.io.FileUtils;
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+
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+import java.io.File;
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+import java.io.IOException;
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+import java.util.Arrays;
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+
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+public class FfmpegUtil {
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+
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+ /**
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+ * @param sourcePath 原始图片路径
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+ * @param videoPath 视频生成路径
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+ * @param filename 视频文件名称
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+ * @param ffmpeg 视频软件路径
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+ */
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+ @SneakyThrows
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+ public static void imgToMp4(String sourcePath, String videoPath, String filename, double inputFrameRate, String ffmpeg) {
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+ int nameLength = copyImgToTemp(sourcePath);
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+ String execute = LinuxUtil.execute(ffmpeg
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+ + " -r " + inputFrameRate
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+ + " -i " + FileUtil.addSeparator(sourcePath) + "tmp/image%0" + nameLength + "d.tga"
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+ + " -y "
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+ + videoPath + "/" + filename + ".mp4"
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+ );
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+ }
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+
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+ /**
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+ * 计算帧率
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+ *
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+ * @param imageNumber 图片数量
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+ * @param second 视频长度
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+ * @param decimalPlaces 帧率保留几位小数
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+ * @return 帧率
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+ */
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+ public static double computeFramerate(int imageNumber, int second, int decimalPlaces) {
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+ return Math.round(imageNumber * Math.pow(10.0, decimalPlaces) / second) / Math.pow(10.0, decimalPlaces);
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+ }
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+
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+ private static int copyImgToTemp(String sourcePath) throws IOException {
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+ File file = new File(sourcePath);
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+ File[] files = file.listFiles();
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+ assert files != null;
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+ Arrays.sort(files);
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+ String[] names = file.list();
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+ assert names != null;
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+ Arrays.sort(names);
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+ int nameLength = getLen(names.length);//获取图片总张数的位数大小，用于补齐图片名称，例如image000.jpg,image001.jpg ....image999.jpg
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+ int makeUpMaxNum = getMakeUpMaxNum(nameLength);//图片名字需要补齐的最大数
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+ if (names.length > 0) {
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+ String tmpPath = sourcePath + "/tmp";
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+ new File(tmpPath).mkdir();
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+ for (int i = 0; i < names.length; i++) {
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+ String name = names[i];
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+ if (name.lastIndexOf(".") > 0) {
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+ int lo = name.lastIndexOf(".");
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+ String lastName = name.substring(lo);
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+ String forNeName = String.valueOf(i);
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+ if (i <= makeUpMaxNum) {
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+ StringBuilder zeString = new StringBuilder();
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+ for (int j = 0; j < nameLength - forNeName.length(); j++) {
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+ zeString.append("0");
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+ }
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+ forNeName = "image" + zeString + forNeName + lastName;
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+ } else {
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+ forNeName = "image" + forNeName + lastName;
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+ }
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+ FileUtils.copyFile(files[i], new File(tmpPath + "/" + forNeName));
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+ }
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+ }
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+ }
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+ return nameLength;
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+ }
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+
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+ public static int getLen(int x) {
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+ if (x < 10) return 1;
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+ return getLen(x / 10) + 1;
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+ }
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+
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+ public static int getMakeUpMaxNum(int len) {
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+ int num = 1;
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+ for (int i = 1; i < len; i++) {
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+ num = num * 10;
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+ }
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+ return num - 1;
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+ }
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+
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+}
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root