问使用ffmpeg版本2.8检测旋转角度和旋转最终视频

EN

ffprobe -of json -show_streams {$input} | grep rotate

"ffmpeg -i {$input} -strict -2 -vcodec libx264 -preset slow -vb 500k -maxrate 500k -bufsize 1000k -vf 'scale=-1:480 ".fix_video_orientation($input)."' -threads 0 -ab 64k -s {$resolution}  -movflags faststart -metadata:s:v:0 rotate=0 {$output}";

function fix_video_orientation($input){

$return= ", transpose=1 ";

$dd= exec("ffprobe -of json -show_streams  {$input}   | grep rotate");

if(!empty($dd)){

$dd=explode(":",$dd);
$rotate=str_replace(",","",str_replace('"',"",$dd[1]));

if($rotate=="90")return $return;

else if ($rotate=="180") return ", transpose=2,transpose=2 ";

else if($rotate == "270") return ", transpose=2 ";
}

ffprobe version N-77455-g4707497 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
libavutil 55. 11.100 / 55. 11.100
libavcodec 57. 20.100 / 57. 20.100
libavformat 57. 20.100 / 57. 20.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 21.101 / 6. 21.101
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/standard/PORTRAIT.m4v':
Metadata:
major_brand : qt

minor_version : 0
compatible_brands: qt

creation_time : 2016-02-03 05:25:18
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 4S
com.apple.quicktime.software: 9.2.1
com.apple.quicktime.creationdate: 2016-02-03T10:52:11+0530
Duration: 00:00:03.34, start: 0.000000, bitrate: 7910 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2016-02-03 05:25:18
handler_name : Core Media Data Handler
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 720x1280 [SAR 1:1 DAR 9:16], 7832 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 50 tbc (default)
Metadata:
creation_time : 2016-02-03 05:25:18
handler_name : Core Media Data Handler
encoder : H.264
Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2016-02-03 05:25:18
handler_name : Core Media Data Handler
Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2016-02-03 05:25:18
handler_name : Core Media Data Handler
Unsupported codec with id 0 for input stream 2
Unsupported codec with id 0 for input stream 3