ffmpeg是一款开源、跨平台的视频处理程序，可用在Windows、mac、linux等平台，可以方便的运用多种语言脚本来调用其执行视频的操作。

下面介绍使用ffmpeg获取视频首帧的方法。

?php
//待处理视频
$in_file = 'http://cdn.fintechuni.cn/video/2019/12/25/222834_f93690f37496456a9674763d69bcd9c0.mp4';
    
//缩略图保存路径
$out_file =  './test.jpg';
    
 
//shell脚本
$shell = "ffmpeg -i $in_file -y -f  image2  -ss 00:00:01 -vframes 1  $out_file 2>
    &
    1";
    
 
//调用php的exec方法去执行脚本
exec($shell, $output, $return_val);
    
 
//获取输出信息
print_r($output);

FFmpeg获得视频文件的缩略图

function getVideoCover($file,$time,$name) {
    
   if(empty($time))$time = '1';
    //默认截取第一秒第一帧
   $strlen = strlen($file);
    
   //exec("ffmpeg -i ".$file." -y -f mjpeg -ss ".$time." -t 0.001 -s 320x240 ".$name."",$out,$status);
    
   $str = "ffmpeg -i ".$file." -y -f mjpeg -ss 3 -t ".$time." -s 320x240 ".$name;
    
   $result = system($str);

 }
    

Fmpeg读取视频信息

?php
define('FFMPEG_PATH', '/usr/local/ffmpeg2/bin/ffmpeg -i "%s" 2>
    &
    1');

  
function getVideoInfo($file) {
    
   
  $command = sprintf(FFMPEG_PATH, $file);
    
   
  ob_start();
    
  passthru($command);
    
  $info = ob_get_contents();
    
  ob_end_clean();
    
  
  $data = array();

  if (preg_match("/Duration: (.*?), start: (.*?), bitrate: (\d*) kb\/s/", $info, $match)) {
    
    $data['duration'] = $match[1];
     //播放时间
    $arr_duration = explode(':', $match[1]);
    
    $data['seconds'] = $arr_duration[0] * 3600 + $arr_duration[1] * 60 + $arr_duration[2];
     //转换播放时间为秒数
    $data['start'] = $match[2];
     //开始时间 
    $data['bitrate'] = $match[3];
 //码率(kb)
  }

  if (preg_match("/Video: (.*?), (.*?), (.*?)[,\s]/", $info, $match)) {
    
    $data['vcodec'] = $match[1];
     //视频编码格式
    $data['vformat'] = $match[2];
     //视频格式
    $data['resolution'] = $match[3];
     //视频分辨率
    $arr_resolution = explode('x', $match[3]);
    
    $data['width'] = $arr_resolution[0];
    
    $data['height'] = $arr_resolution[1];

  }

  if (preg_match("/Audio: (\w*), (\d*) Hz/", $info, $match)) {
    
    $data['acodec'] = $match[1];
     //音频编码
    $data['asamplerate'] = $match[2];
 //音频采样频率
  }
    
  if (isset($data['seconds']) &
    &
 isset($data['start'])) {
    
    $data['play_time'] = $data['seconds'] + $data['start'];
 //实际播放时间
  }
    
  $data['size'] = filesize($file);
     //文件大小
  return $data;

}
    
  
//用法
$video_info = getVideoInfo('video.mp4');
    
print_r($video_info);
    
?>

Fmpeg获得视频文件的总长度时间和创建时间

function getTime($file){
    
   $vtime = exec("ffmpeg -i ".$file." 2>
    &
    1 | grep 'Duration' | cut -d ' ' -f 4 | sed s/,//");
    //总长度
   $ctime = date("Y-m-d H:i:s",filectime($file));
    //创建时间
   //$duration = explode(":",$time);
    
   // $duration_in_seconds = $duration[0]*3600 + $duration[1]*60+ round($duration[2]);
    //转化为秒
   return array('vtime'=>
    $vtime,
   'ctime'=>
    $ctime
   );

}

另外一种方法

ffprobe -v quiet -print_format json -show_format -show_streams test.mp4

结果

{
"streams": [
{
"index": 0,
"codec_name": "h264",
"codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
"profile": "High",
"codec_type": "video",
"codec_time_base": "1/1200",
"codec_tag_string": "avc1",
"codec_tag": "0x31637661",
"width": 538,
"height": 888,
"coded_width": 544,
"coded_height": 896,
"has_b_frames": 0,
"sample_aspect_ratio": "0:1",
"display_aspect_ratio": "0:1",
"pix_fmt": "yuv420p",
"level": 31,
"color_range": "tv",
"color_space": "bt709",
"color_transfer": "bt709",
"color_primaries": "bt709",
"chroma_location": "left",
"refs": 2,
"is_avc": "1",
"nal_length_size": "4",
"r_frame_rate": "30/1",
"avg_frame_rate": "30/1",
"time_base": "1/600",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 6040,
"duration": "10.066667",
"bit_rate": "1022789",
"bits_per_raw_sample": "8",
"nb_frames": "302",
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0
} ,
"tags": {
"creation_time": "2020-01-01 15:59:27",
"language": "und",
"handler_name": "Core Media Video"
}
} ,
{
"index": 1,
"codec_name": "aac",
"codec_long_name": "AAC (Advanced Audio Coding)",
"profile": "LC",
"codec_type": "audio",
"codec_time_base": "1/44100",
"codec_tag_string": "mp4a",
"codec_tag": "0x6134706d",
"sample_fmt": "fltp",
"sample_rate": "44100",
"channels": 1,
"channel_layout": "mono",
"bits_per_sample": 0,
"r_frame_rate": "0/0",
"avg_frame_rate": "0/0",
"time_base": "1/44100",
"start_pts": -2112,
"start_time": "-0.047891",
"duration_ts": 442368,
"duration": "10.031020",
"bit_rate": "45569",
"max_bit_rate": "48000",
"nb_frames": "432",
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0
} ,
"tags": {
"creation_time": "2020-01-01 15:59:27",
"language": "und",
"handler_name": "Core Media Audio"
}
}
],
"format": {
"filename": "test.mp4",
"nb_streams": 2,
"nb_programs": 0,
"format_name": "mov,mp4,m4a,3gp,3g2,mj2",
"format_long_name": "QuickTime / MOV",
"start_time": "-0.047891",
"duration": "10.066667",
"size": "1351439",
"bit_rate": "1073991",
"probe_score": 100,
"tags": {
"major_brand": "mp42",
"minor_version": "1",
"compatible_brands": "isommp41mp42",
"creation_time": "2020-01-01 15:59:27"
}
}
}

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