使用 php 将 youtube 视频下载到服务器

Question

我正在尝试将 Youtube 视频直接下载到托管空间。当我在本地服务器（例如我的 PC 上的 xampp）上尝试该脚本时，它运行良好。但是当我在 000webhosting 上尝试该脚本时，它不起作用。它显示这样的错误

在此屏幕截图中查看我遇到的问题

错误如下。

呃哦，好像发生了错误：无法找到 MP4 视频源。

下面是下载 Youtube 视频的 PHP 代码。

<?php

// What YouTube URL was provided to us?
$url = (string) @$_GET['url'];

/**
 * Define a function to extract a YouTube Video ID from a URL.
 *
 * @param    string    $url    A YouTube Video URL
 * @return    mixed            If successful, will return a string. If failed, will return NULL
 */

function getYouTubeVideoIdFromUrl( $url )
{
preg_match( "/^(?:http(?:s)?:\/\/)?(?:www\.)?(?:m\.)?(?:youtu\.be\/|youtube\.com\/(?:(?:watch)?\?(?:.*&)?v(?:i)?=|(?:embed|v|vi|user)\/))([^\?&\"'>]+)/", $url, $matches );

// If this match exists.
if ( sizeof( $matches ) >= 2 && strlen( $matches[1] ) )
{
    return $matches[1];
}

return NULL;
}

/**
* Define a function to extract a YouTube encoded stream URL.
*
* @param    array    $streams    An array of streams provided to us from YouTube's "get_video_info" page.
* @return    mixed                If successful, will return the MP4 stream URL. If failed, will return NULL
 */

function getMP4FromEncodedStream( $streams )
{
foreach( $streams as $stream )
{
    // Decode this stream's data.
    parse_str( $stream, $data );

    // If we found our MP4 stream source.
    if ( stripos( $data['type'], 'video/mp4' ) === 0 )
    {
        return $data['url'];
    }
}

// We didn't find any, whoops..
return NULL;
}

// Try to validate their request.
try
{
// If an invalid YouTube URL was provided.
if ( ( $videoId = getYouTubeVideoIdFromUrl( $url ) ) === NULL )
{
    throw new Exception( 'An invalid YouTube Video URL was provided.' );
}

// Retrieve all information pertaining to this Video; more specifically, we're looking for the encoded video streams.
parse_str( file_get_contents( 'http://youtube.com/get_video_info?video_id=' . $videoId ), $videoData );

// If there's a problem extracting information.
if ( @$videoData['status'] == 'fail' )
{
    throw new Exception( $videoData['reason'] );
}

// Were we able to locate an encoded stream in MP4 format?
if ( ( $streamUrl = getMP4FromEncodedStream( explode( ',', $videoData['url_encoded_fmt_stream_map'] ) ) ) === NULL )
{
    throw new Exception( 'No MP4 video source was able to be located.' );
}

// Where will we be saving this Video?
$saveAs = dirname( __FILE__ ) . '/' . $videoId . '.mp4';

// Try to open the encoded video stream URL.
if ( $read = @fopen( $streamUrl, 'r' ) )
{
    // Open the file we want to save to.
    $write = @fopen( $saveAs, 'w' );

    // Write the stream to our file.
    $streamReturn = stream_copy_to_stream( $read, $write );

    // Close our files.
    @fclose( $read );
    @fclose( $write );

    // If we were unable to copy from stream.
    if ( $streamReturn === false )
    {
        throw new Exception( 'We were unable to copy this from the stream.' );
    }
}

// If our new file doesn't exist, we have a problem.
if ( !@file_exists( $saveAs ) )
{
    throw new Exception( 'We encountered an issue saving this Video.' );
}

// Everything saved properly, let them know there they can see their file.
print 'Your Video <strong>' . $videoId . '</strong> has been saved to <strong>' . $saveAs . '</strong>';
}
// If something went wrong.
catch( Exception $e )
{
print '<strong>Uh oh, it looks like an error occurred:</strong> ' . $e->getMessage( );
}

?>

您所需要做的就是将此脚本复制到您的网络服务器，并使用如下 URL 之一运行该文件：

http://www.mywebserver.com/youtube-downloader.php?url=https://www.youtube.com/watch?v=dQw4w9WgXcQ
http://www.mywebserver.com/youtube-downloader.php?url=https://youtu.be/dQw4w9WgXcQ

一切正常，但视频没有下载到在线服务器、托管空间。

帮助..提前感谢..

Answer 1

尝试使用urlencode()您的 YouTube 网址

http://php.net/manual/en/function.urlencode.php