我正在尝试从ffprobe生成可能的视频质量，但它没有使用条件语句IF-ELSE选择正确的结果。我确定这些可能品质的策略可能是错误的，但在对它进行了长时间的研究之后。我无法完成目标，我只是通过将视频的height和width相乘，然后手动将视频质量放在array()中，但我的代码没有选择对了。
这是我为它写的代码
exec("ffprobe -i josh.mp4 -v quiet -print_format json -show_format -show_streams -hide_banner > temp_file", $output, $res);
$info = json_decode(file_get_contents("temp_file"));
echo "Video duration: " . $info->format->duration . "\n<br>";
echo "Video size: " . $info->format->size . "\n<br>";
echo "Video resolution width: " . $info->streams[0]->width . "\n<br>";
echo "Video resolution height: " . $info->streams[0]->height . "\n<br>";
echo "Video aspect ratio: " . $info->streams[0]->display_aspect_ratio . "\n<br>";
echo "Video codec: " . $info->streams[0]->codec_name . "\n<br>";
echo "Audio codec: " . $info->streams[1]->codec_name . "\n<br>";
echo "Audio sample rate: " . $info->streams[1]->sample_rate . "\n<br>";
$video_converstions = null;
$video_resolution = $info->streams[0]->width*$info->streams[0]->height;
if ($video_resolution > '921600' || $video_resolution < '2073600') { // 1080p
$video_converstions = array('144', '240', '360', '480', '720', '1080');
} elseif ($video_resolution > '409920' || $video_resolution < '921600') { // 720p
$video_converstions = array('144', '240', '360', '480', '720');
} elseif ($video_resolution > '230400' || $video_resolution < '409920') { // 480p
$video_converstions = array('144', '240', '360', '480');
} elseif ($video_resolution > '102240' || $video_resolution < '230400') { // 360p
$video_converstions = array('144', '240', '360');
} elseif ($video_resolution > '36864' || $video_resolution < '102240') { // 240p
$video_converstions = array('144', '240');
} elseif ($video_resolution > '0' && $video_resolution < '36864') { // 144p
$video_converstions = array('144');
} else { // 144p
$video_converstions = array('144');
}
echo "<pre>";
print_r($video_converstions);
echo "</pre>";
以下是我能够打印的结果
Video duration: 10.640000
Video size: 527821
Video resolution width: 400
Video resolution height: 300
Video aspect ratio: 0:1
Video codec: h264
Audio codec: aac
Audio sample rate: 48000
Array (
[0] => 144
[1] => 240
[2] => 360
[3] => 480
[4] => 720
[5] => 1080
)
我的期望是我使用的条件语句将仅打印360p的结果，但它根本不起作用。如果任何其他简单的解决方案可以取代我的策略，那将是非常愉快
答案 0 :(得分：1)
需要将'或'切换为'和'
$video_converstions = null;
$video_resolution = 400*300;
if ($video_resolution > '921600' and $video_resolution < '2073600') { // 1080p
$video_converstions = array('144', '240', '360', '480', '720', '1080');
} elseif ($video_resolution > '409920' and $video_resolution < '921600') { // 720p
$video_converstions = array('144', '240', '360', '480', '720');
} elseif ($video_resolution > '230400' and $video_resolution < '409920') { // 480p
$video_converstions = array('144', '240', '360', '480');
} elseif ($video_resolution > '102240' and $video_resolution < '230400') { // 360p
$video_converstions = array('144', '240', '360');
} elseif ($video_resolution > '36864' and $video_resolution < '102240') { // 240p
$video_converstions = array('144', '240');
} elseif ($video_resolution > '0' and $video_resolution < '36864') { // 144p
$video_converstions = array('144');
} else { // 144p
$video_converstions = array('144');
}
echo($video_resolution.'<br>');
print_r($video_converstions);
答案 1 :(得分：0)
基于像素的精度不是100％，您应该建立自己的数据库
function quality ($in) {
$wh = array(
'3840x2160' => '1080p',
'2560x1440' => '1080p',
'1920x1080' => '1080p',
'1918x1080' => '1080p',
'1920x1078' => '1080p',
'1916x1080' => '1080p',
'1914x1080' => '1080p',
'1920x1076' => '1080p',
'1912x1080' => '1080p',
'1906x1080' => '1080p',
'1920x1072' => '1080p',
'1904x1080' => '1080p',
'1896x1080' => '1080p',
'1920x1064' => '1080p',
'1920x1056' => '1080p',
'1872x1080' => '1080p',
'1920x1048' => '1080p',
'1862x1080' => '1080p',
'1860x1080' => '1080p',
'1850x1080' => '1080p',
'1920x1040' => '1080p',
'1916x1040' => '1080p',
'1920x1036' => '1080p',
'1920x1034' => '1080p',
'1920x1032' => '1080p',
'1920x1030' => '1080p',
'1826x1080' => '1080p',
'1920x1024' => '1080p',
'1920x1020' => '1080p',
'1808x1080' => '1080p',
'1920x1016' => '1080p',
'1800x1080' => '1080p',
'1920x1012' => '1080p',
'1792x1080' => '1080p',
'1776x1080' => '1080p',
'1920x960' => '1080p',
'1920x956' => '1080p',
'1920x952' => '1080p',
'1960x868' => '1080p',
'1920x874' => '1080p',
'1920x872' => '1080p',
'1920x856' => '1080p',
'1488x1080' => '1080p',
'1472x1080' => '1080p',
'1920x824' => '1080p',
'1464x1080' => '1080p',
'1920x816' => '1080p',
'1920x812' => '1080p',
'1920x810' => '1080p',
'1440x1080' => '1080p',
'1438x1080' => '1080p',
'1920x808' => '1080p',
'1436x1080' => '1080p',
'1920x806' => '1080p',
'1920x804' => '1080p',
'1920x802' => '1080p',
'1920x800' => '1080p',
'1920x798' => '1080p',
'1920x796' => '1080p',
'1920x792' => '1080p',
'1408x1080' => '1080p',
'1920x784' => '1080p',
'1920x768' => '1080p',
'1920x764' => '1080p',
'1920x720' => '1080p',
'1920x696' => '1080p',
'816x1080' => '1080p',
'1282x528' => '1080p',
'1916x1076' => '720p',
'1914x1076' => '720p',
'1912x1076' => '720p',
'1912x1072' => '720p',
'1918x1040' => '720p',
'1916x1038' => '720p',
'1916x1034' => '720p',
'1912x1036' => '720p',
'1916x1032' => '720p',
'1904x1024' => '720p',
'1680x1050' => '720p',
'1916x816' => '720p',
'1912x808' => '720p',
'1916x804' => '720p',
'1428x1078' => '720p',
'1918x802' => '720p',
'1916x800' => '720p',
'1912x800' => '720p',
'1912x798' => '720p',
'1916x796' => '720p',
'1424x1068' => '720p',
'1916x792' => '720p',
'1912x792' => '720p',
'1908x792' => '720p',
'1908x788' => '720p',
'1904x784' => '720p',
'1392x1040' => '720p',
'1920x720' => '720p',
'1736x720' => '720p',
'1720x720' => '720p',
'1712x720' => '720p',
'1664x720' => '720p',
'1280x720' => '720p',
'1278x720' => '720p',
'1280x718' => '720p',
'1280x716' => '720p',
'1272x720' => '720p',
'1280x714' => '720p',
'1280x704' => '720p',
'1248x720' => '720p',
'1280x696' => '720p',
'1280x694' => '720p',
'1280x692' => '720p',
'1280x688' => '720p',
'1280x686' => '720p',
'1280x682' => '720p',
'1206x720' => '720p',
'1204x720' => '720p',
'1200x720' => '720p',
'1280x674' => '720p',
'1280x672' => '720p',
'1280x668' => '720p',
'1184x720' => '720p',
'1172x720' => '720p',
'1280x640' => '720p',
'1280x638' => '720p',
'1280x634' => '720p',
'1280x628' => '720p',
'1280x626' => '720p',
'1280x600' => '720p',
'1280x598' => '720p',
'1280x596' => '720p',
'1280x582' => '720p',
'1280x576' => '720p',
'994x720' => '720p',
'992x720' => '720p',
'1280x550' => '720p',
'1280x546' => '720p',
'1280x544' => '720p',
'1278x544' => '720p',
'1280x542' => '720p',
'1280x540' => '720p',
'960x720' => '720p',
'958x720' => '720p',
'1280x538' => '720p',
'1280x536' => '720p',
'1280x534' => '720p',
'1280x532' => '720p',
'1280x530' => '720p',
'940x720' => '720p',
'1280x528' => '720p',
'1280x502' => '720p',
'1280x496' => '720p',
'864x720' => '720p',
'1146x480' => '720p',
'800x448' => '720p',
'800x432' => '720p',
'404x720' => '720p',
'1152x648' => '480p',
'1274x544' => '480p',
'1276x532' => '480p',
'1270x532' => '480p',
'1264x528' => '480p',
'1088x608' => '480p',
'1024x576' => '480p',
'864x648' => '480p',
'992x558' => '480p',
'1140x480' => '480p',
'960x540' => '480p',
'960x538' => '480p',
'960x514' => '480p',
'1008x480' => '480p',
'920x518' => '480p',
'896x504' => '480p',
'1020x440' => '480p',
'854x520' => '480p',
'768x576' => '480p',
'960x456' => '480p',
'864x490' => '480p',
'864x486' => '480p',
'864x480' => '480p',
'720x576' => '480p',
'856x480' => '480p',
'854x480' => '480p',
'752x544' => '480p',
'852x480' => '480p',
'854x478' => '480p',
'850x480' => '480p',
'848x480' => '480p',
'854x476' => '480p',
'854x474' => '480p',
'854x468' => '480p',
'854x464' => '480p',
'694x570' => '480p',
'720x544' => '480p',
'812x480' => '480p',
'854x456' => '480p',
'720x540' => '480p',
'854x454' => '480p',
'804x480' => '480p',
'720x528' => '480p',
'768x480' => '480p',
'688x528' => '480p',
'688x512' => '480p',
'726x480' => '480p',
'720x480' => '480p',
'854x382' => '480p',
'664x480' => '480p',
'656x480' => '480p',
'654x480' => '480p',
'640x490' => '480p',
'640x488' => '480p',
'640x486' => '480p',
'648x480' => '480p',
'640x484' => '480p',
'854x362' => '480p',
'644x480' => '480p',
'854x360' => '480p',
'640x480' => '480p',
'640x478' => '480p',
'634x480' => '480p',
'854x356' => '480p',
'854x354' => '480p',
'854x352' => '480p',
'626x480' => '480p',
'624x480' => '480p',
'854x320' => '480p',
'480x360' => '480p',
'320x512' => '480p',
'848x478' => '360p',
'800x450' => '360p',
'800x436' => '360p',
'780x440' => '360p',
'852x394' => '360p',
'768x432' => '360p',
'852x370' => '360p',
'746x420' => '360p',
'848x360' => '360p',
'640x476' => '360p',
'640x472' => '360p',
'704x428' => '360p',
'718x410' => '360p',
'720x408' => '360p',
'720x406' => '360p',
'720x404' => '360p',
'718x404' => '360p',
'720x400' => '360p',
'706x404' => '360p',
'706x402' => '360p',
'720x392' => '360p',
'704x400' => '360p',
'720x390' => '360p',
'720x388' => '360p',
'712x392' => '360p',
'704x396' => '360p',
'720x384' => '360p',
'800x338' => '360p',
'704x384' => '360p',
'592x448' => '360p',
'720x368' => '360p',
'720x364' => '360p',
'720x360' => '360p',
'672x384' => '360p',
'576x432' => '360p',
'720x342' => '360p',
'688x352' => '360p',
'720x334' => '360p',
'576x416' => '360p',
'720x328' => '360p',
'654x360' => '360p',
'648x360' => '360p',
'650x358' => '360p',
'672x346' => '360p',
'648x358' => '360p',
'644x360' => '360p',
'640x362' => '360p',
'642x360' => '360p',
'640x360' => '360p',
'638x360' => '360p',
'640x358' => '360p',
'636x360' => '360p',
'630x360' => '360p',
'720x314' => '360p',
'626x360' => '360p',
'640x352' => '360p',
'720x312' => '360p',
'634x352' => '360p',
'720x308' => '360p',
'640x346' => '360p',
'632x350' => '360p',
'720x306' => '360p',
'640x344' => '360p',
'624x352' => '360p',
'720x304' => '360p',
'640x342' => '360p',
'720x302' => '360p',
'602x360' => '360p',
'600x360' => '360p',
'720x300' => '360p',
'640x336' => '360p',
'640x334' => '360p',
'720x294' => '360p',
'720x288' => '360p',
'606x340' => '360p',
'512x400' => '360p',
'640x320' => '360p',
'624x328' => '360p',
'640x318' => '360p',
'564x360' => '360p',
'512x384' => '360p',
'512x380' => '360p',
'672x288' => '360p',
'592x320' => '360p',
'576x320' => '360p',
'560x320' => '360p',
'480x368' => '360p',
'640x274' => '360p',
'576x304' => '360p',
'640x272' => '360p',
'640x270' => '360p',
'640x268' => '360p',
'640x266' => '360p',
'548x304' => '360p',
'624x256' => '360p',
'640x248' => '360p',
'608x256' => '360p',
'528x294' => '360p',
'526x294' => '360p',
'592x256' => '360p',
'448x336' => '360p',
'512x288' => '360p',
'504x278' => '360p',
'432x320' => '360p',
'480x288' => '360p',
'416x320' => '360p',
'480x276' => '360p',
'480x272' => '360p',
'480x270' => '360p',
'480x268' => '360p',
'480x256' => '360p',
'400x304' => '360p',
'480x240' => '360p',
'384x288' => '360p',
'426x240' => '360p',
'368x272' => '360p',
'416x240' => '360p',
'352x264' => '360p',
'400x226' => '360p',
'426x178' => '360p',
'352x180' => '360p',
'320x176' => '360p',
'256x138' => '360p',
);
if(!isset($wh[$in])){
$out = 'Unknown';
}else{
$out = $wh[$in];
}
return $out;
}