阿里云视频转码与获取视频封面图

1.视频封面图：

截取视频视频首帧为封面图，传入视频存储地址和截取后存储封面地址

public String snapshotVideo(String inputObject, String outputObject) throws ServerException, com.aliyuncs.exceptions.ClientException {
        DefaultProfile.addEndpoint(regionId, regionId, "Mts", "mts." + regionId + ".aliyuncs.com");
        // 创建DefaultAcsClient实例并初始化
        DefaultProfile profile = DefaultProfile.getProfile(regionId, // 地域ID
                accessId, // RAM账号的AccessKey ID
                accessKey); // RAM账号Access Key Secret
        DefaultAcsClient client = new DefaultAcsClient(profile);
        SubmitSnapshotJobRequest request = new SubmitSnapshotJobRequest();
        JSONObject input = new JSONObject();
        input.put("Location", location);
        input.put("Bucket", bucket);
        input.put("Object", inputObject);
        request.setInput(input.toJSONString());
        JSONObject snapshotConfig = new JSONObject();
        JSONObject output = new JSONObject();
        output.put("Location", location);
        output.put("Bucket", bucket);
        output.put("Object", outputObject);
        snapshotConfig.put("OutputFile", output);
        snapshotConfig.put("Time", 0);
        request.setSnapshotConfig(snapshotConfig.toJSONString());
        SubmitSnapshotJobResponse response = client.getAcsResponse(request);
        SnapshotJob job = response.getSnapshotJob();
        if (job.getState().equals("Success")) {
            return "success";
        } else {
            System.out.println("snapshotVideo Failed code:" + job.getCode() + " message:" + job.getMessage());
            return "error";
        }
    }

2.视频转码

传入三个参数：视频存储地址、转码后视频存储地址、管道id（阿里云后台获取）

public String transferVideo(String inputObject, String outputObject, String templateId) throws UnsupportedEncodingException, ClientException, com.aliyuncs.exceptions.ClientException {
        DefaultProfile.addEndpoint(regionId, regionId, "Mts", "mts." + regionId + ".aliyuncs.com");
        // 创建DefaultAcsClient实例并初始化
        DefaultProfile profile = DefaultProfile.getProfile(regionId, // 地域ID
                accessId, // RAM账号的AccessKey ID
                accessKey); // RAM账号Access Key Secret
        IAcsClient client = new DefaultAcsClient(profile);
        // 创建API请求并设置参数
        SubmitJobsRequest request = new SubmitJobsRequest();
        // Input
        JSONObject input = new JSONObject();
        input.put("Location", location);
        input.put("Bucket", bucket);
        input.put("Object", URLEncoder.encode(inputObject, "utf-8"));
        request.setInput(input.toJSONString());
        // Output
        String outputOSSObject = URLEncoder.encode(outputObject, "utf-8");
        JSONObject output = new JSONObject();
        output.put("OutputObject", outputOSSObject);
        output.put("TemplateId", templateId);
        JSONArray outputs = new JSONArray();
        outputs.add(output);
        request.setOutputs(outputs.toJSONString());
        request.setOutputBucket(bucket);
        request.setOutputLocation(location);
        // PipelineId
        request.setPipelineId(pipelineId);
        // 发起请求并处理应答或异常
        SubmitJobsResponse response = client.getAcsResponse(request);
        System.out.println("RequestId is:" + response.getRequestId());
        if (response.getJobResultList().get(0).getSuccess()) {
            return response.getJobResultList().get(0).getJob().getJobId();
        } else {
            System.out.println("SubmitJobs Failed code:" + response.getJobResultList().get(0).getCode() + " message:" + response.getJobResultList().get(0).getMessage());
            return "error";
        }
    }

转码后返回转码结果，如转码失败可以利用返回id，再次转码

 public boolean checkJobDone(String jobIds) throws ServerException, com.aliyuncs.exceptions.ClientException {
        DefaultProfile.addEndpoint(regionId, regionId, "Mts", "mts." + regionId + ".aliyuncs.com");
        // 创建DefaultAcsClient实例并初始化
        DefaultProfile profile = DefaultProfile.getProfile(regionId, // 地域ID
                accessId, // RAM账号的AccessKey ID
                accessKey); // RAM账号Access Key Secret
        DefaultAcsClient client = new DefaultAcsClient(profile);
        QueryJobListRequest request = new QueryJobListRequest();
        request.setJobIds(jobIds);
        QueryJobListResponse response = client.getAcsResponse(request);
        List jobList = response.getJobList();
        boolean res = true;
        for (Job job : jobList) {
            logger.info("转码结果,jobId={},message={},code={},percent={},state={}", job.getJobId(), job.getMessage(), job.getCode(), job.getPercent(), job.getState());
            if (!job.getState().equals("TranscodeSuccess")) {
                res = false;
                logger.error("转码失败,jobId={},message={},code={}", job.getJobId(), job.getMessage(), job.getCode());
                break;
            }
        }
        return res;
    }

如果转码失败，可以重复调用，直到转码成功。