七牛云音视频转码、生成视频图片

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/**
 * 七牛云转码、生成视频截图
 *
 * @param  \Qiniu\Auth $auth
 * @param  string      $transParams
 * @param  string      $bucket
 * @param  string      $dir
 * @param  string      $key
 * @param  string      $filename
 * @param  string      $notifyUrl
 * @return array
 * 
 * @see https://developer.qiniu.com/dora/api/persistent-data-processing-pfop#4
 */
public function executeTranscoding(\Qiniu\Auth $auth, ?string $transParams, string $bucket, string $dir, string $key, string $filename, string $notifyUrl): array
{
    if (empty($transParams)) {
        return null;
    }

    $key = ltrim($key, '/');

    $pfop = new \Qiniu\Processing\PersistentFop($auth);

    // 截图文件存放位置
    $filepath = sprintf('%s/%s', rtrim($dir, '/'), ltrim($filename, '/'));

    $saveAs = "$bucket:$filepath";

    $fops = $transParams.'|saveas/'.\Qiniu\base64_urlSafeEncode($saveAs);
    $pipeline = 'default.sys';
    $force = false;

    [$id, ] = $pfop->execute($bucket, $key, $fops, $pipeline, $notifyUrl, $force);

    return [
        'id' => $id,
        'path' => $filepath,
    ];
}