PHP的exec（）不执行FFmpeg的命令 [英] PHP's exec() not executing command for FFmpeg

问题描述

我在我的服务器上安装了ffmpeg，它通过我的终端工作正常。我能够成功地将文件转换为webm格式，所以我确定安装是正常的。我也确定我只有一个安装的ffmpeg安装在我的机器上。

I have installed ffmpeg on my server and it works fine via my terminal. I'm able to successfully convert a file to webm format, so I'm sure the installation is fine. I'm also sure that I only have one installation of ffmpeg installed on my machine.

当我尝试通过PHP通过PHP的exec（）转换文件时出现问题。当我运行相同的命令，我在终端，没有任何反应。我围着stackoverflow和网络的其他部分寻求帮助。我试过这个看看输出：

A problem arises when I try to convert files through PHP via PHP's exec(). When I run the same commands, I ran in the terminal, nothing happens. I looked around stackoverflow and other parts of the net for some help. I tried this to see the output:

exec($cmd, $out, $rv);
echo "output is:\n".implode("\n", $out)."\n exit code:$rv\n";

输出为：output is：exit code：127

The output is: "output is: exit code:127"

我使用的命令格式如下：

The command I'm using is in this format:

ffmpeg -i "sample.mov" -vcodec libvpx  -r 30 -b "644k" -acodec libvorbis -ab 128000   -ar "44100" -ac 2 -s "352x198" "sample.webm"

我尝试用FFmpeg的完整路径替换ffmpeg，但是没有工作。

I've tried replacing "ffmpeg" with the full path to FFmpeg but that did not work.

是不是脚本正确运行命令并转换文件？

Why isn't the script running the command correctly and converting the files?

谢谢！

推荐答案

我有类似的问题，从蚂蚁目标执行从PHP。我不能得到整个输出从ant命令只有前几行和蚂蚁目标没有执行。换句话说是部分执行。

I have similar problem with ant target executions from php. I can't get whole output from ant command only first few rows and ant target was not executed. In other words is partial executed.

使用bellow命令我设法运行它，但命令的输出附加到log_file.log。

With bellow command I've managed to run it but output of the command is append to log_file.log.

$commandString = 'you_command_here >> log_file.log 2>&1 &';
$command = exec($commandString);

希望这会为你工作。

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