前言
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"
}
}
}
总结
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