php+ffmpeg 获取视频相关信息（缩略图、视频分辨率）

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。

&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

&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"
        }
    }
}