Object Storage Service:Audio transcoding

Java

Requires SDK for Java 3.17.4 or later.

import com.aliyun.oss.ClientBuilderConfiguration;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.AsyncProcessObjectRequest;
import com.aliyun.oss.model.AsyncProcessObjectResult;
import com.aliyuncs.exceptions.ClientException;

import java.util.Base64;

public class Demo {
    public static void main(String[] args) throws ClientException {
        // yourEndpoint: The endpoint of the region where your bucket is located.
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // The region ID for the endpoint, for example, cn-hangzhou.
        String region = "cn-hangzhou";
        // Obtain access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured.
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the bucket name.
        String bucketName = "examplebucket";
        // Specify the transcoded audio file.
        String targetKey = "dest.aac";
        // Specify the source audio file.
        String sourceKey = "src.mp3";

        // Create an OSSClient instance.
        // When the OSSClient instance is no longer used, call the shutdown method to release resources.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
        OSS ossClient = OSSClientBuilder.create()
                .endpoint(endpoint)
                .credentialsProvider(credentialsProvider)
                .clientConfiguration(clientBuilderConfiguration)
                .region(region)
                .build();

        try {
            // Build the audio processing style string and audio transcoding parameters.
            String style = String.format("audio/convert,ss_10000,t_60000,f_aac,ab_96000");
            // Build the asynchronous processing instruction.
            String bucketEncoded = Base64.getUrlEncoder().withoutPadding().encodeToString(bucketName.getBytes());
            String targetEncoded = Base64.getUrlEncoder().withoutPadding().encodeToString(targetKey.getBytes());
            String process = String.format("%s|sys/saveas,b_%s,o_%s/notify,topic_QXVkaW9Db252ZXJ0", style, bucketEncoded, targetEncoded);
            // Create an AsyncProcessObjectRequest object.
            AsyncProcessObjectRequest request = new AsyncProcessObjectRequest(bucketName, sourceKey, process);
            // Execute the asynchronous processing task.
            AsyncProcessObjectResult response = ossClient.asyncProcessObject(request);
            System.out.println("EventId: " + response.getEventId());
            System.out.println("RequestId: " + response.getRequestId());
            System.out.println("TaskId: " + response.getTaskId());

        } finally {
            // Shut down the OSSClient.
            ossClient.shutdown();
        }
    }
}

Python

Requires SDK for Python 2.18.4 or later.

# -*- coding: utf-8 -*-
import base64
import oss2
from oss2.credentials import EnvironmentVariableCredentialsProvider

def main():
    # Obtain access credentials from environment variables. Before you run this sample code, make sure that the environment variables are configured.
    auth = oss2.ProviderAuth(EnvironmentVariableCredentialsProvider())
    # The endpoint of the region where the bucket is located. For example, for China (Hangzhou), use https://oss-cn-hangzhou.aliyuncs.com.
    endpoint = 'https://oss-cn-hangzhou.aliyuncs.com'

    # Specify the bucket name, for example, examplebucket.
    bucket = oss2.Bucket(auth, endpoint, 'examplebucket')

    # Specify the name of the source audio file.
    source_key = 'src.mp3'

    # Specify the name of the transcoded audio file.
    target_key = 'dest.aac'

    # Build the audio processing style string and audio transcoding parameters.
    audio_style = 'audio/convert,ss_10000,t_60000,f_aac,ab_96000'

    # Build the processing instruction, including the save path and the Base64-encoded bucket name and target object name.
    bucket_name_encoded = base64.urlsafe_b64encode('examplebucket'.encode()).decode().rstrip('=')
    target_key_encoded = base64.urlsafe_b64encode(target_key.encode()).decode().rstrip('=')
    process = f"{audio_style}|sys/saveas,b_{bucket_name_encoded},o_{target_key_encoded}/notify,topic_QXVkaW9Db252ZXJ0"

    try:
        # Execute the asynchronous processing task.
        result = bucket.async_process_object(source_key, process)
        print(f"EventId: {result.event_id}")
        print(f"RequestId: {result.request_id}")
        print(f"TaskId: {result.task_id}")
    except Exception as e:
        print(f"Error: {e}")


if __name__ == "__main__":
    main()

Go

Requires SDK for Go 3.0.2 or later.

package main

import (
	"encoding/base64"
	"fmt"
	"log"
	"os"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Obtain temporary access credentials from environment variables. Before you run this sample code, make sure that the OSS_ACCESS_KEY_ID, OSS_ACCESS_KEY_SECRET, and OSS_SESSION_TOKEN environment variables are configured.
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Create an OSSClient instance.
	// yourEndpoint: The endpoint of the region where your bucket is located. For example, for China (Hangzhou), use https://oss-cn-hangzhou.aliyuncs.com. Set this parameter based on the actual region.
	// yourRegion: The region ID, for example, cn-hangzhou.
	client, err := oss.New("https://oss-cn-hangzhou.aliyuncs.com", "", "", oss.SetCredentialsProvider(&provider), oss.AuthVersion(oss.AuthV4), oss.Region("cn-hangzhou"))
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Specify the bucket name, for example, examplebucket.
	bucketName := "examplebucket"

	bucket, err := client.Bucket(bucketName)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Specify the name of the source audio file.
	sourceKey := "src.mp3"
	// Specify the name of the transcoded audio file.
	targetKey := "dest.aac"

	// Build the audio processing style string and audio transcoding parameters.
	audioStyle := "audio/convert,ss_10000,t_60000,f_aac,ab_96000"

	// Build the processing instruction, including the save path and the Base64-encoded bucket name and target object name.
	bucketNameEncoded := base64.URLEncoding.EncodeToString([]byte(bucketName))
	targetKeyEncoded := base64.URLEncoding.EncodeToString([]byte(targetKey))
	process := fmt.Sprintf("%s|sys/saveas,b_%v,o_%v/notify,topic_QXVkaW9Db252ZXJ0", audioStyle, bucketNameEncoded, targetKeyEncoded)

	// Execute the asynchronous processing task.
	result, err := bucket.AsyncProcessObject(sourceKey, process)
	if err != nil {
		log.Fatalf("Failed to async process object: %s", err)
	}

	fmt.Printf("EventId: %s\n", result.EventId)
	fmt.Printf("RequestId: %s\n", result.RequestId)
	fmt.Printf("TaskId: %s\n", result.TaskId)
}