How to use PHP to develop the video editing function of WeChat applet?

How to use PHP to develop the video editing function of WeChat applet?

With the development of social media, video content has become more and more popular among users. As one of the largest social platforms in China, WeChat mini program has an increasing demand for video editing functions. This article will introduce how to use PHP to develop the video editing function of WeChat applet and provide specific code examples.

1. Preparation

Before you start, make sure you have completed the following preparations:

1. Register an account on the WeChat mini program platform and create a mini program program.
2. Install PHP and related extension libraries, such as FFmpeg and ImageMagick.
3. Get the development documentation of WeChat Mini Program and understand the basic architecture and API of WeChat Mini Program.

2. Implementation of the video editing function

1. Upload video files

The user selects the video file to be edited on the WeChat mini program. and upload it to the server. After the server receives the video file, it stores it in the specified directory.

Sample code:

if ($_FILES['video']['error'] === UPLOAD_ERR_OK) {
  $targetPath = '/path/to/video/files/';
  $fileName = basename($_FILES['video']['name']);
  move_uploaded_file($_FILES['video']['tmp_name'], $targetPath . $fileName);
}

2. Video editing

Use the FFmpeg library to edit videos. The FFmpeg command line tool can be called through the shell_exec() function for video processing.

Sample code:

$inputFile = '/path/to/video/files/video.mp4';
$outputFile = '/path/to/video/files/output.mp4';
$start = '00:00:10'; // 起始时间
$end = '00:00:20'; // 结束时间

$command = "ffmpeg -i $inputFile -ss $start -t $duration -c:v copy -c:a copy $outputFile";
shell_exec($command);

3. Video synthesis

The video synthesis function is realized by merging multiple video files into one video file.

Sample code:

$inputFile1 = '/path/to/video/files/video1.mp4';
$inputFile2 = '/path/to/video/files/video2.mp4';
$outputFile = '/path/to/video/files/output.mp4';

$command1 = "ffmpeg -i $inputFile1 -c:v copy -c:a copy -f mpegts intermediate1.ts";
$command2 = "ffmpeg -i $inputFile2 -c:v copy -c:a copy -f mpegts intermediate2.ts";
$command3 = "ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c:v copy -c:a copy -bsf:a aac_adtstoasc $outputFile";

shell_exec($command1);
shell_exec($command2);
shell_exec($command3);

4. Video transcoding

Transcode the video file into a format acceptable to the mini program, such as MP4.

Sample code:

$inputFile = '/path/to/video/files/video.mov';
$outputFile = '/path/to/video/files/output.mp4';

$command = "ffmpeg -i $inputFile -c:v libx264 -preset slow -crf 22 -pix_fmt yuv420p -c:a copy $outputFile";
shell_exec($command);

5. Video cover capture

Use the ImageMagick library to capture the cover of the video file and save it as an image file.

Sample code:

$inputFile = '/path/to/video/files/video.mp4';
$outputFile = '/path/to/video/files/cover.jpg';
$time = '00:00:10'; // 截取的时间点

$command = "ffmpeg -i $inputFile -ss $time -vframes 1 $outputFile";
shell_exec($command);

3. Implementation of the mini program

In the front-end part of the mini program, the video editing function can be implemented by calling the API provided by the WeChat mini program Operations, such as uploading video files, obtaining video covers, etc. For specific operation steps, please refer to the WeChat applet development documentation.

Sample code:

wx.chooseVideo({
  sourceType: ['album', 'camera'],
  maxDuration: 60,
  success(res) {
    const tempFilePath = res.tempFilePath;

    // 将本地视频文件上传到服务器
    wx.uploadFile({
      url: 'http://example.com/upload.php',
      filePath: tempFilePath,
      name: 'video',
      success(result) {
        console.log('视频上传成功');
      },
    });

    // 获取视频封面
    wx.createVideoContext("video").getImageInfo({
      src: tempFilePath,
      success(result) {
        const coverUrl = result.path;
        console.log('封面截取成功');
      },
    });

    // 其他视频编辑操作...
  },
});

Through the above steps, you can use PHP to develop the video editing function of the WeChat applet. Obtain video files uploaded by users, perform operations such as editing, synthesis, transcoding, and cover capture on the videos, and display the results on the mini program.

Summary:

This article introduces how to use PHP to develop the video editing function of WeChat applet and provides specific code examples. We hope that the guidance in this article can help developers implement the video editing function of WeChat mini programs.

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