YouTube 字幕

了解如何使用 Web Scraper API 抓取 YouTube 视频的字幕（隐藏式字幕）。了解参数和实用示例。

您可以通过提供 YouTube 视频 ID 和一个 language_code 到 youtube_subtitles 源进行爬取。

字幕（closed captions）与稿本是分开的。要提取标准稿本，请使用 YouTube 转录源进行爬取。

请求示例

下面的示例演示如何从上传者提供字幕的 YouTube 视频检索英文闭合字幕。

curl 'https://realtime.oxylabs.io/v1/queries' \
--user 'USERNAME:PASSWORD' \
-H 'Content-Type: application/json' \
-d '{
        "source": "youtube_subtitles",
        "query": "c4P_YuNnZ7U",
        "context": [
            {
                "key": "language_code",
                "value": "en"
            },
            {
                "key": "subtitle_origin",
                "value": "uploader_provided"
            }
        ]
    }'

import requests
from pprint import pprint

# 构建负载。
payload = {
    'source': 'youtube_subtitles',
    'query': 'c4P_YuNnZ7U',
    'context': [
        {
            'key': 'language_code',
            'value': 'en'
        },
        {
            'key': 'subtitle_origin',
            'value': 'uploader_provided'
        }
    ]
}

# 获取响应。
response = requests.request(
    'POST',
    'https://realtime.oxylabs.io/v1/queries',
    auth=('username', 'password'),
    json=payload,
)

# 打印包含结果的 JSON 响应。
pprint(response.json())

const https = require("https");

const username = "USERNAME";
const password = "PASSWORD";
const body = {
    source: "youtube_subtitles",
    query: "c4P_YuNnZ7U",
    context: [
        {
            key: "language_code",
            value: "en",
        },
        {
            key: "subtitle_origin",
            value: "uploader_provided",
        },
    ],
};

const options = {
    hostname: "realtime.oxylabs.io",
    path: "/v1/queries",
    method: "POST",
    headers: {
        "Content-Type": "application/json",
        Authorization:
            "Basic " + Buffer.from(`${username}:${password}`).toString("base64"),
    },
};

const request = https.request(options, (response) => {
    let data = "";

    response.on("data", (chunk) => {
        data += chunk;
    });

    response.on("end", () => {
        const responseData = JSON.parse(data);
        console.log(JSON.stringify(responseData, null, 2));
    });
});

request.on("error", (error) => {
    console.error("Error:", error);
});

request.write(JSON.stringify(body));
request.end();

# 您提交的整个字符串必须进行 URL 编码。

https://realtime.oxylabs.io/v1/queries?source=youtube_subtitles&query=c4P_YuNnZ7U&context=%5B%7B%22key%22%3A%22language_code%22%2C%22value%22%3A%22en%22%7D%2C%7B%22key%22%3A%22subtitle_origin%22%2C%22value%22%3A%22uploader_provided%22%7D%5D&access_token=12345abcde

<?php

$params = array(
    'source' => 'youtube_subtitles',
    'query' => 'c4P_YuNnZ7U',
    'context' => array(
        array(
            'key' => 'language_code',
            'value' => 'en'
        ),
        array(
            'key' => 'subtitle_origin',
            'value' => 'uploader_provided'
        )
    )
);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, "https://realtime.oxylabs.io/v1/queries");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($params));
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_USERPWD, "USERNAME" . ":" . "PASSWORD");

$headers = array();
$headers[] = "Content-Type: application/json";
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$result = curl_exec($ch);
echo $result;

if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}

curl_close($ch);

package main

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

func main() {
	const Username = "USERNAME"
	const Password = "PASSWORD"

	// 定义包含 query 和 context 参数的载荷。
	payload := map[string]interface{}{
		"source": "youtube_subtitles",
		"query":  "c4P_YuNnZ7U",
		"context": []map[string]string{
			{
				"key":   "language_code",
				"value": "en",
			},
			{
				"key":   "subtitle_origin",
				"value": "uploader_provided",
			},
		},
	}

	jsonValue, err := json.Marshal(payload)
	if err != nil {
		fmt.Println("Error marshalling JSON:", err)
		return
	}

	client := &http.Client{}
	request, err := http.NewRequest("POST", "https://realtime.oxylabs.io/v1/queries", bytes.NewBuffer(jsonValue))
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}

	request.SetBasicAuth(Username, Password)
	request.Header.Set("Content-Type", "application/json")

	response, err := client.Do(request)
	if err != nil {
		fmt.Println("Error making request:", err)
		return
	}
	defer response.Body.Close()

	responseText, err := ioutil.ReadAll(response.Body)
	if err != nil {
		fmt.Println("Error reading response:", err)
		return
	}

	fmt.Println(string(responseText))
}

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Json;
using System.Text;
using System.Threading.Tasks;

namespace OxyApi
{
    class Program
    {
        static async Task Main()
        {
            const string Username = "USERNAME";
            const string Password = "PASSWORD";

            var parameters = new
            {
                source = "youtube_subtitles",
                query = "c4P_YuNnZ7U",
                context = new[]
                {
                    new { key = "language_code", value = "en" },
                    new { key = "subtitle_origin", value = "uploader_provided" }
                }
            };

            var client = new HttpClient();

            Uri baseUri = new Uri("https://realtime.oxylabs.io");
            client.BaseAddress = baseUri;

            var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/v1/queries");
            requestMessage.Content = JsonContent.Create(parameters);

            var authenticationString = $"{Username}:{Password}";
            var base64EncodedAuthenticationString = Convert.ToBase64String(Encoding.UTF8.GetBytes(authenticationString));
            requestMessage.Headers.Add("Authorization", "Basic " + base64EncodedAuthenticationString);

            try
            {
                var response = await client.SendAsync(requestMessage);
                response.EnsureSuccessStatusCode();

                var contents = await response.Content.ReadAsStringAsync();
                Console.WriteLine(contents);
            }
            catch (HttpRequestException e)
            {
                Console.WriteLine($"Request error: {e.Message}");
            }
        }
    }
}

package org.example;

import okhttp3.*;
import org.json.JSONArray;
import org.json.JSONObject;
import java.util.concurrent.TimeUnit;

public class Main implements Runnable {
    private static final String AUTHORIZATION_HEADER = "Authorization";
    public static final String USERNAME = "USERNAME";
    public static final String PASSWORD = "PASSWORD";

    public void run() {
        // 使用 context 参数构建 JSON 载荷
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("source", "youtube_subtitles");
        jsonObject.put("query", "c4P_YuNnZ7U");

        JSONArray contextArray = new JSONArray();
        contextArray.put(new JSONObject().put("key", "language_code").put("value", "en"));
        contextArray.put(new JSONObject().put("key", "subtitle_origin").put("value", "uploader_provided"));

        jsonObject.put("context", contextArray);

        Authenticator authenticator = (route, response) -> {
            String credential = Credentials.basic(USERNAME, PASSWORD);
            return response
                    .request()
                    .newBuilder()
                    .header(AUTHORIZATION_HEADER, credential)
                    .build();
        };

        var client = new OkHttpClient.Builder()
                .authenticator(authenticator)
                .readTimeout(180, TimeUnit.SECONDS)
                .build();

        var mediaType = MediaType.parse("application/json; charset=utf-8");
        var body = RequestBody.create(jsonObject.toString(), mediaType);
        var request = new Request.Builder()
                .url("https://realtime.oxylabs.io/v1/queries")
                .post(body)
                .build();

        try (var response = client.newCall(request).execute()) {
            if (response.body() != null) {
                try (var responseBody = response.body()) {
                    System.out.println(responseBody.string());
                }
            }
        } catch (Exception exception) {
            System.out.println("Error: " + exception.getMessage());
        }

        System.exit(0);
    }

    public static void main(String[] args) {
        new Thread(new Main()).start();
    }
}

{
    "source": "youtube_subtitles",
    "query": "c4P_YuNnZ7U",
    "context": [
        {
            "key": "language_code",
            "value": "en"
        },
        {
            "key": "subtitle_origin",
            "value": "uploader_provided"
        }
    ]
}

我们的示例使用 Realtime 集成方法。如果您想使用 Proxy Endpoint, 或异步 Push-Pull 集成，请参阅 集成方法 部分。

23KB

YT_subtitles_output.json

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请求参数值

通用

参数

说明

默认值

source

设置要使用的爬虫。

youtube_subtitles

query

YouTube 视频 ID。

—

context： language_code

指定字幕的语言。查找可用值此处. 注意：如果提供的 language_code 在 YouTube 视频中没有匹配的字幕/闭合字幕时，结果返回一个 404 状态。

—

context： subtitle_origin

指定是否检索由...提供的字幕 auto_generated 或 uploader_provided.

—

callback_url

您的回调端点的 URL。 更多信息.

—

– 必需参数

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