FFMpeg：ffmpeg无法执行命令错误

Question

我正在尝试通过php / html上传将上传到我网站服务器的1.2mb文件的视频文件转码，但我一直收到错误：

PHP致命错误：未捕获的异常＆＃39; Alchemy \ BinaryDriver \ Exception \ ExecutionFailureException＆＃39;消息＆fffmpeg无法执行命令＆＃39; / usr / local / bin / ffmpeg＆＃39; ＆＃39; -y＆＃39; ＆＃39; -i＆＃39; ＆＃39; /home/user/public_html/contents/videos/1490719990_MP4_360p_Short_video_clip_nature_mp4.mp4' ＆＃39; -async＆＃39; ＆＃39; 1＆＃39; ＆＃39; - 元数据：S：V：0＆＃39; ＆＃39; START_TIME = 0＆＃39; ＆＃39; -r＆＃39; ＆＃39; 16＆＃39; ＆＃39; -b_strategy＆＃39; ＆＃39; 1＆＃39; ＆＃39; -bf＆＃39; ＆＃39; 3＆＃39; ＆＃39; -g＆＃39; ＆＃39; 9＆＃39; ＆＃39; -vcodec＆＃39; ＆＃39; libx264＆＃39; ＆＃39; -acodec＆＃39; ＆＃39;了libmp3lame＆＃39; ＆＃39; -b：V＆＃39; ＆＃39; 128K＆＃39; ＆＃39; -refs＆＃39; ＆＃39; 6＆＃39; ＆＃39; -coder＆＃39; ＆＃39; 1＆＃39; ＆＃39; -sc_threshold＆＃39; ＆＃39; 40＆＃39; ＆＃39; -flags＆＃39; ＆＃39; +环路＆＃39; ＆＃39; -me_range＆＃39; ＆＃39; 16＆＃39; ＆＃39; -subq＆＃39; ＆＃39; 7＆＃39; ＆＃39; -i_qfactor＆＃39; ＆＃39; 0.71＆＃39; ＆＃39; -qcomp＆＃39; ＆＃39; 0.6＆＃39; ＆＃39; -qdiff＆＃39; ＆＃39; 4＆＃39; ＆＃39; -trellis＆＃39; ＆＃39; 1＆＃39; ＆＃39; -b：一个＆＃39; ＆＃39; 8K＆＃39; ＆＃39; -ac＆＃39; ＆＃39; 1＆＃39; ＆＃39; -pass＆＃39; ＆＃39; 1＆＃39; ＆＃39; -passlogfile＆＃39; ＆＃39; / TMP / ffmpeg的-passes58dab05a323b6eknk4 /传递58dab05a32465＆＃39; ＆＃39; /home/user/public_html/contents/videos/1490719990_MP4_360p_Short_video_clip_nature_mp4_22995.mp4'＆＃39;在/home/user/public_html/app/ffmpeg/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/ProcessRunner.php:100 堆栈跟踪：

0 /home/user/public_html/app/ffmpeg/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/ProcessRunner.php(72）：/ home / user / public_html / app / ffmpeg / vendor中的Alch第168行/php-ffmpeg/php-ffmpeg/src/FFMpeg/Media/Video.php

有趣的是，同一台服务器使用ffprobe和ffmpeg提取帧并获取同一文件的持续时间。

以下是我用于转码的代码：

$ffmpeg = $ffmpeg = FFMpeg\FFMpeg::create(['timeout'=>3600, 'ffmpeg.thread'=>12, 'ffmpeg.binaries'  => '/usr/local/bin/ffmpeg',
    'ffprobe.binaries' => '/usr/local/bin/ffprobe']);

            $ffprobe_prep = FFMpeg\FFProbe::create(['ffmpeg.binaries'  => '/usr/local/bin/ffmpeg',
    'ffprobe.binaries' => '/usr/local/bin/ffprobe']);
            $ffprobe = $ffprobe_prep->format($video_file);

            $video = $ffmpeg->open($video_file);

            // Get video duration to ensure our videos are never longer than our video limit.
            $duration = $ffprobe->get('duration');

            // Use mp4 format and set the audio bitrate to 56Kbit and Mono channel.
            // TODO: Try stereo later...
            $format = new FFMpeg\Format\Video\X264('libmp3lame', 'libx264');
            $format
                -> setKiloBitrate(128)
                -> setAudioChannels(1)
                -> setAudioKiloBitrate(8);

            $first = $ffprobe_prep
                        ->streams($video_file)
                        ->videos()
                        ->first();

            $width = $first->get('width');

            if($width > VIDEO_WIDTH){
                // Resize to 558 x 314 and resize to fit width.
                $video
                    ->filters()
                    ->resize(new FFMpeg\Coordinate\Dimension(VIDEO_WIDTH, ceil(VIDEO_WIDTH / 16 * 9)));
            }

            // Trim to videos longer than three minutes to 3 minutes.
            if($duration > MAX_VIDEO_PLAYTIME){

                $video
                    ->filters()
                    ->clip(FFMpeg\Coordinate\TimeCode::fromSeconds(0), FFMpeg\Coordinate\TimeCode::fromSeconds(MAX_VIDEO_PLAYTIME));
            }

            // Change the framerate to 16fps and GOP as 9.
            $video
                ->filters()
                ->framerate(new FFMpeg\Coordinate\FrameRate(16), 9);

            // Synchronize audio and video
            $video->filters()->synchronize();

            $video->save($format, $video_file_new_2);

我已联系我的主人，没有重要帮助。他们可以为我提供的唯一有用信息是ffmpeg是在服务器上编译的，支持libmp3lame。

此代码适用于localhost

对于我为什么会收到错误以及如何纠正错误的任何帮助表示赞赏。