I am working on a PHP code as shown below in which conversion of mp4 into mp3 is happening at Line B.
I have added if block after system command to print Conversion Completed on the webpage once the conversion is complete but it doesn't seem to work.
Php code:
if (isset($_POST['id']))
{
for($i=0; $i <count($mp4_files); $i++) {
if($i == $_POST['id']) {
$f = $mp4_files[$i];
$parts = pathinfo($f);
switch ($parts['extension'])
{
case 'mp4' :
$filePath = $src_dir . DS . $f;
print_r($f); // Line A
system('<em>ffmpeg</em> -i ' . $filePath . ' -map 0:2 -ac 1 ' . $destination_dir . DS . $parts['filename'] . '.mp3', $result); // Line B
if($result)
{
echo "Conversion Completed";
}
}
}
}
}
Problem Statement:
I am wondering what changes I should make in the PHP code above so that once the conversion is complete; on the webpage, it should print Conversion Completed.
在命令后面加上 2>&1例如;system("ls -al 2>&1 ");其显示信息会在浏览器中输出。官网：
This is for WINDOWS users. I am running apache and I have been trying for hours now to capture the output of a command. I’d tried everything tha
hey there i am developing a video sharing site and i need to change the video format and get its thumbnail etc i know this can be done by <em>ffmpeg</em>-<em>php</em> library.
but i have never used any <em>php</em> lib before .
i have successfully installed <em>ffmpeg</em> to my system (laptop) i can check it by typing library <em>ffmpeg</em> -version to my comand prompt it says something like this
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Windows\system32><em>ffmpeg</em> -version
<em>ffmpeg</em> version N-73818-g9ebe041 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads -- enable-avis
ynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable
-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --en
able-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-lib
ilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable
-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enab
le-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enabl
e-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc -
-enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enabl
e-decklink --enable-zlib
libavutil 54. 28.100 / 54. 28.100
libavcodec 56. 49.101 / 56. 49.101
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 25.100 / 5. 25.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
but i am having problem with accessing the library by my <em>php</em> code i think i have't installed it to my <em>php</em> module
here is what my wamp shows me
Server Configuration
Apache Version :
2.4.9 - Documentation
PHP Version :
5.5.12 - Documentation
Server Software:
Apache/2.4.9 (Win64) PHP/5.5.12
Loaded Extensions :
apache2handlerbcmathbz2calendarcom_dotnetCorectypecurlda
tedomeregexiffileinfofil[![enter image description here][1]][1]terftpgdgettextgmphashiconvimapjsonlib
xmlmbstringmcryptmhashmysqlmysqlimysqlndod
bcopensslpcrePDOpdo_mysqlpdo_sqlitePharReflectio
nsessionshmopSimpleXMLsoapsocket sSPLsqlite3standardtokenizerwddxxdebugxmlxmlreaderxmlrpcxmlwriterxslzipzlib
MySQL Version :
5.6.17 - Documentation
if possible please tell me the next step so that i can access the <em>ffmpeg</em> lib from my <em>php</em> code .
a little help is also appreciated.
1.please tell me any link availabe to get the <em>ffmpeg</em>-<em>php</em> module and how to installl it
2.how to access the module/lib from my code justa small code example.
THANK YOU.
PHP使用FFMpeg来转换视频格式。Github上搜索FFMPEG,到https://github.com/PHP-FFMpeg/PHP-FFMpeg。
For Windows users : Please find the binaries athttp://<em>ffmpeg</em>.zeranoe.com/builds/.详细使用过程，见我上一篇博客。
以下操作，默认是在Linux服务器...
前言
搜集网上的高频JS初级面试题，不再是我自己出题
验证和复习之前学过的知识
补充其他技能，如正则表达式，数组API
注意：
题目没有按照知识点或者难度排序，即混排
只筛选了初级面试题，即本课程知识体系之内的
持续添加中。。。
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