PHP：使用同步标志上传 YouTube v3 API 字幕

Question

在过去的几周里，我和我的同事一直在努力尝试通过 v3 API 为我们的客户 YouTube 视频添加字幕。大约一周后，我们终于可以上传字幕了.但是，我们可以下载上传的原始格式；所以我们知道文件已成功上传。

我们还能够让同步标志起作用，告诉 YouTube 运行脚本并设置视频的时间，但它实际上不起作用。它返回告诉我们它正在同步，但是当我们转到视频的 UI 时，它只显示字幕轨道名称并向我们提供消息“轨道内容未处理。”。我们已经用完了所有的时间，现在我们正在利用自己的时间来解决这个问题，但仍然没有运气。

以前有人遇到过这个问题吗？如果是这样，你能做些什么来让它发挥作用？

我将在下面发布我的代码的 sn-p，显示我们脚本的上传部分。

# Insert a video caption.
# Create a caption snippet with video id, language, name and draft status.
$captionSnippet = new Google_Service_YouTube_CaptionSnippet();
$captionSnippet->setVideoId($videoId);
$captionSnippet->setLanguage($captionLanguage);
$captionSnippet->setName($captionName);
$captionSnippet->setIsDraft( true );

# Create a caption with snippet.
$caption = new Google_Service_YouTube_Caption();
$caption->setSnippet($captionSnippet);

// Setting the defer flag to true tells the client to return a request which can be called
$client->setDefer(false);

// Get the file content's of the uploaded file
$file = file_get_contents( $captionFile['tmp_name'] );

// Create a request for the API's captions.insert method to create and upload a caption.
$insertRequest = $youtube->captions->insert("snippet", $caption, array( 
  'sync' => true, 
  'data' => $file, 
  'mimeType' => 'application/octet-stream', 
  'uploadType' => 'multipart' )  
); 

echo '<pre>'; print_r( $insertRequest ); echo '</pre>';

// // Read the caption file and upload it chunk by chunk.
$status = $insertRequest;
fclose($handle);

// If you want to make other calls after the file upload, set setDefer back to false
$client->setDefer(false);

谢谢你，
泰勒·斯坦豪斯

Answer 1

您是否尝试过使用 Google 发布的功能来实现您想要的功能？

以下取自https://developers.google.com/youtube/v3/code_samples/php

/**
 * Uploads a caption track in draft status that matches the API request parameters.
 * (captions.insert)
 *
 * @param Google_Service_YouTube $youtube YouTube service object.
 * @param Google_Client $client Google client.
 * @param $videoId the YouTube video ID of the video for which the API should
 *  return caption tracks.
 * @param $captionLanguage language of the caption track.
 * @param $captionName name of the caption track.
 * @param $captionFile caption track binary file.
 * @param $htmlBody html body.
 */
function uploadCaption(Google_Service_YouTube $youtube, Google_Client $client, $videoId,
    $captionFile, $captionName, $captionLanguage, &$htmlBody) {
    # Insert a video caption.
    # Create a caption snippet with video id, language, name and draft status.
    $captionSnippet = new Google_Service_YouTube_CaptionSnippet();
    $captionSnippet->setVideoId($videoId);
    $captionSnippet->setLanguage($captionLanguage);
    $captionSnippet->setName($captionName);

    # Create a caption with snippet.
    $caption = new Google_Service_YouTube_Caption();
    $caption->setSnippet($captionSnippet);

    // Specify the size of each chunk of data, in bytes. Set a higher value for
    // reliable connection as fewer chunks lead to faster uploads. Set a lower
    // value for better recovery on less reliable connections.
    $chunkSizeBytes = 1 * 1024 * 1024;

    // Setting the defer flag to true tells the client to return a request which can be called
    // with ->execute(); instead of making the API call immediately.
    $client->setDefer(true);

    // Create a request for the API's captions.insert method to create and upload a caption.
    $insertRequest = $youtube->captions->insert("snippet", $caption);

    // Create a MediaFileUpload object for resumable uploads.
    $media = new Google_Http_MediaFileUpload(
        $client,
        $insertRequest,
        '*/*',
        null,
        true,
        $chunkSizeBytes
    );
    $media->setFileSize(filesize($captionFile));


    // Read the caption file and upload it chunk by chunk.
    $status = false;
    $handle = fopen($captionFile, "rb");
    while (!$status && !feof($handle)) {
      $chunk = fread($handle, $chunkSizeBytes);
      $status = $media->nextChunk($chunk);
    }

    fclose($handle);

    // If you want to make other calls after the file upload, set setDefer back to false
    $client->setDefer(false);

    $htmlBody .= "<h2>Inserted video caption track for</h2><ul>";
    $captionSnippet = $status['snippet'];
    $htmlBody .= sprintf('<li>%s(%s) in %s language, %s status.</li>',
        $captionSnippet['name'], $status['id'], $captionSnippet['language'],
        $captionSnippet['status']);
    $htmlBody .= '</ul>';
}

Answer 2

我能够重现此问题，并找到了可能的解决方法。关键是上传的字幕文件的内容。提示是它在the documentation 中所说的：

sync 参数指示 YouTube 是否应自动将字幕文件与视频的音轨同步。如果您将该值设置为 true，YouTube 将忽略上传的字幕文件中的任何时间码并为字幕生成新的时间码。

如果您要上传没有时间码的脚本，或者您怀疑文件中的时间码不正确并希望 YouTube 尝试修复它们，则应将 sync 参数设置为 true。

使它对我有用的调整是添加一些我知道不正确的虚拟时间代码，并设置 'sync' => 'true', 以便 YouTube 服务可以更正它们。例如，下面是 不 起作用的 .sbv 文件：

This is a sample video to test the YouTube API captioning system.

当我使用这个文件时，我遇到了和你一样的错误，即Track content is not processed，但是当我把它改成这个时它就起作用了：

00:00:00,00:00:00
This is a sample video to test the YouTube API captioning system.

当我从 YouTube 下载处理后的 .sbv 文件时，它看起来像这样：

0:00:00.000,0:00:04.266
This is a sample video to test the YouTube
API captioning system.

当然，我只为a VERY trivial video 尝试过这个，我认为他们在时间安排上做得不是很好，但希望它可以扩大到适用于您的系统。