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php实现视频流替换

2026-04-03 10:12:59PHP

PHP实现视频流替换的方法

使用文件流处理

通过PHP的fopen和fread函数读取视频文件并输出流

php实现视频流替换

$file = 'path/to/video.mp4';
$fp = @fopen($file, 'rb');

header("Content-Type: video/mp4");
header("Content-Length: " . filesize($file));

fpassthru($fp);
exit;

使用HTTP范围请求处理

支持断点续传的视频流处理方式

php实现视频流替换

$file = 'replacement_video.mp4';
$filesize = filesize($file);
$offset = 0;
$length = $filesize;

if (isset($_SERVER['HTTP_RANGE'])) {
    preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches);
    $offset = intval($matches[1]);
    $length = isset($matches[2]) ? intval($matches[2]) - $offset + 1 : $filesize - $offset;

    header('HTTP/1.1 206 Partial Content');
    header("Content-Range: bytes $offset-" . ($offset + $length - 1) . "/$filesize");
}

header("Content-Type: video/mp4");
header("Accept-Ranges: bytes");
header("Content-Length: $length");

$fp = fopen($file, 'rb');
fseek($fp, $offset);
echo fread($fp, $length);
fclose($fp);

使用FFmpeg进行实时转码

需要服务器安装FFmpeg，实现实时转码输出

$videoPath = 'input.mp4';
$command = "ffmpeg -i $videoPath -f mp4 -movflags frag_keyframe+empty_moov - 2>/dev/null";

header('Content-Type: video/mp4');
passthru($command);

视频代理实现

通过PHP作为中间代理获取并转发远程视频流

$remoteUrl = 'http://example.com/original.mp4';
$context = stream_context_create(['http' => ['method' => 'GET']]);
$remoteStream = fopen($remoteUrl, 'rb', false, $context);

header('Content-Type: video/mp4');
while (!feof($remoteStream)) {
    echo fread($remoteStream, 8192);
    ob_flush();
    flush();
}
fclose($remoteStream);