问题描述：

现在有个需求，需要对视频平均截9张图；参考阿里云文档（https://help.aliyun.com/document_detail/56333.html?spm=a2c4g.11186623.6.754.56b5d84aXbBrNs），发现如下问题

  1. 当Interval小于等于2得时候，其他参数无效，只能抽取首帧1张图（即num设置无效）
  2. 参考文档得抽帧截图参数部分（如下图）：https://help.aliyun.com/document_detail/29253.html?spm=a2c4g.11186623.6.729.20fad84aBPIdhz ，（用了一个5s得视频测试，只有一张图，测试视频[https://gusteau-test.oss-cn-hangzhou.aliyuncs.com/component/1592380139915.mp4]）(用了一个半分钟得视频测试，只有5张图，测试视频[http://gusteau-test.oss-cn-hangzhou.aliyuncs.com/material/clip/video/2020/09/21/e6u47i5g8fk.mp4])

image.png

测试代码如下

  1.     private static String accessKeyId = "xxx";
  2.     private static String accessKeySecret = "xxx";
  3.     private static String ossLocation = "oss-cn-hangzhou";
  4.     private static String mpsRegionId = "cn-hangzhou";
  5.     private static String pipelineId = "xxx";
  6.     private static String ossBucket = "xxx";
  7.     private static String ossInputObject = "xxx";
  8.     private static String ossOutputObject = "xxx";
  9.     public static void main(String[] args) {
  10.         // DefaultAcsClient
  11.         DefaultProfile profile = DefaultProfile.getProfile(
  12.             mpsRegionId,      // Region ID
  13.             accessKeyId,      // AccessKey ID
  14.             accessKeySecret); // Access Key Secret
  15.         IAcsClient client = new DefaultAcsClient(profile);
  16.         // request
  17.         SubmitSnapshotJobRequest request = new SubmitSnapshotJobRequest();
  18.         // Input
  19.         JSONObject input = new JSONObject();
  20.         input.put("Location", ossLocation);
  21.         input.put("Bucket", ossBucket);
  22.         try {
  23.             input.put("Object", URLEncoder.encode(ossInputObject, "utf-8"));
  24.         } catch (UnsupportedEncodingException e) {
  25.             throw new RuntimeException("input URL encode failed");
  26.         }
  27.         request.setInput(input.toJSONString());
  28.         // SnapshotConfig
  29.         JSONObject snapshotConfig = new JSONObject();
  30.         // SnapshotConfig->OutputFile
  31.         JSONObject output = new JSONObject();
  32.         output.put("Location", ossLocation);
  33.         output.put("Bucket", ossBucket);
  34.         try {
  35.             output.put("Object", URLEncoder.encode(ossOutputObject, "utf-8"));
  36.         } catch (UnsupportedEncodingException e) {
  37.             throw new RuntimeException("output URL encode failed");
  38.         }
  39.         snapshotConfig.put("OutputFile", output.toJSONString());
  40.         // SnapshotConfig->Time
  41.         snapshotConfig.put("Time", "0");
  42.         // SnapshotConfig->Interval/Num
  43.         snapshotConfig.put("Interval", "0");
  44.         snapshotConfig.put("Num", "9");
  45.         // SnapshotConfig->Width/Height
  46.         // snapshotConfig.put("Height", "360");
  47.         // SnapshotConfig
  48.         request.setSnapshotConfig(snapshotConfig.toJSONString());
  49.         // PipelineId
  50.         request.setPipelineId(pipelineId);
  51.         // call api
  52.         SubmitSnapshotJobResponse response;
  53.         try {
  54.             response = client.getAcsResponse(request);
  55.             System.out.println("RequestId is:"+response.getRequestId());
  56.             System.out.println("JobId is:" + response.getSnapshotJob().getId());
  57.         } catch (ServerException e) {
  58.             e.printStackTrace();
  59.         } catch (ClientException e) {
  60.             e.printStackTrace();
  61.         }
  62.     }

解决：

找了阿里客服，最后的解决也很简单，如果视频很短最好将FrameType设置为normal。
image.png
晕死，文档也没说鸭。