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功能介绍

MusicTagging 为用户提供音乐标签分类能力，通过曲风、情绪、场景、语言、二级曲风5个维度分析音乐，自动生成各维度下的分类标签以及对应概率值。

• 输入：一段音乐音频，以及音乐标签任务参数
• 输出：指定标签类别的预测概率值

接口说明

• 当前支持通过 HTTP 协议在线调用

• 请求内容包括：

  • payload字段为将请求参数序列化后的json文本
  • data字段为将音频二进制文件按照base64格式编码（标准base64，RFC 4648）的文本

• 使用备注：

公共参数

参考详细说明功能调用-通用协议

配置参数

payload配置参数为json字符串格式

响应格式

HTTP响应Content-Type: application/json

• 响应结果payload为json字符串格式，json内容格式如下：

payload示例：

{
  "pred": [0.09001981,0.05727265,...,0.14518361],
  "task_flow": {
    "result": [
      {
        "task_type": "MusicTaggingMood",
        "pred_dim": 6,
        "task_output": {
          "tags": [
            "sorrow",
            "chill",
            "excited",
            "happy",
            "angry",
            "romantic"
          ]
        }
      },
      {
        "task_type": "MusicTaggingTheme",
        "pred_dim": 14,
        "task_output": {
          "tags": [
            "kadian",
            "DIY",
            "family",
            "sound_effect",
            "campus",
            "ACG",
            "game",
            "pet",
            "Beauty_fashion",
            "travel",
            "Chinese_Style",
            "cool",
            "dancale",
            "vlog"
          ]
        }
      }
    ]
  }
}

参考示例

调用方式为：POST /api/v1/invoke

Golang

// Code sample:
// use http client to invoke SAMI HTTP Service
package main

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"time"
)

type InvokeResponse struct {
	StatusCode int32   `form:"status_code,required" json:"status_code,required" query:"status_code,required"`
	StatusText string  `form:"status_text,required" json:"status_text,required" query:"status_text,required"`
	TaskId     string  `form:"task_id,required" json:"task_id,required" query:"task_id,required"`
	Namespace  string  `form:"namespace,required" json:"namespace,required" query:"namespace,required"`
	Payload    *string `form:"payload,omitempty" json:"payload,omitempty" query:"payload,omitempty"`
	Data       []byte  `form:"data,omitempty" json:"data,omitempty" query:"data,omitempty"`
	State      *string `form:"state,omitempty" json:"state,omitempty" query:"state,omitempty"`
}

const (
	domain = "https://sami.bytedance.com"

	// auth token
	appkey    = "your_appkey"

	// SAMI method
	version   = "v4"
	namespace = "MusicTagging"

	// dump output
	dataOutputFile    = "output.wav"
	payloadOutputFile = "output.json"
	isDump            = true
)

func main() {
	// Get token
	token := "your_token"

	// Construct HTTP request
	//   1. Read local audio file
	//   2. Set HTTP json body
	//   3. Do HTTP POST request
	audioPath := "/path/to/audio"
	content, err := ioutil.ReadFile(audioPath)
	if err != nil {
		log.Fatalf("failed to read file: %v", err)
	}
	data := base64.StdEncoding.EncodeToString(content)
	body := fmt.Sprintf(
		`{"data": "%v", "payload":"{\"task_flow\":{\"type\":\"merge\",\"task\":`+
			`[{\"task_type\":\"MusicTaggingGenre17\"},{\"task_type\":\"MusicTaggingMood10\"},`+
			`{\"task_type\":\"MusicTaggingTheme24\"},{\"task_type\":\"MusicTaggingLang24\"},`+
			`{\"task_type\":\"MusicTaggingVocal\"},{\"task_type\":\"MusicTaggingMTT\"}]},`+
			`\"extra\":{\"use_tag\":false}}"}`, data,
	)
	urlPath := fmt.Sprintf(
		"%v/api/v1/invoke?version=%v&token=%v&appkey=%v&namespace=%v",
		domain, version, token, appkey, namespace,
	)
	log.Printf("invoke request: %v", urlPath)

	// HTTP POST request
	start := time.Now()
	resp, err := http.Post(urlPath, "application/json", bytes.NewBuffer([]byte(body)))
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	// Parse HTTP response
	ret, err := ioutil.ReadAll(resp.Body)
	if err != nil || resp.StatusCode != http.StatusOK {
		panic(string(ret))
	}
	log.Printf("http invoke: cost=%vms, response: %v", time.Since(start).Milliseconds(), string(ret))

	// parse SAMI response
	samiResp := InvokeResponse{}
	payloadStr := ""
	if err = json.Unmarshal(ret, &samiResp); err != nil {
		log.Println("parse response failed", string(ret), err)
		panic(err)
	}
	if samiResp.Payload != nil {
		payloadStr = *samiResp.Payload
	}
	log.Printf("response task_id=%v, payload=%v, data=[%d]byte", samiResp.TaskId, payloadStr, len(samiResp.Data))
	if isDump && samiResp.Payload != nil {
		_ = ioutil.WriteFile(payloadOutputFile, []byte(*samiResp.Payload), 0644)
	}
	if isDump && len(samiResp.Data) > 0 {
		_ = ioutil.WriteFile(dataOutputFile, samiResp.Data, 0644)
	}
}

常见问题

• 通用FAQ

• 通用状态码

附录

音乐标签模型列表

• MusicTaggingVocal，2类人声标签
• MusicTaggingMood10，10类情绪标签
• MusicTaggingGenre34，34类曲风标签
• MusicTaggingTheme24，24类场景标签
• MusicTaggingLang30，30类语种标签