59 lines
1.9 KiB
PHP
59 lines
1.9 KiB
PHP
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<?php
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/*
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* ffmpeg.php
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* A barebones ffmpeg based webm implementation for vichan.
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*/
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function get_webm_info($filename) {
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global $board, $config;
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$filename = escapeshellarg($filename);
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$ffprobe = $config['webm']['ffprobe_path'];
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$ffprobe_out = array();
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$webminfo = array();
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exec("$ffprobe -v quiet -print_format json -show_format -show_streams $filename", $ffprobe_out);
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$ffprobe_out = json_decode(implode("\n", $ffprobe_out), 1);
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$webminfo['error'] = is_valid_webm($ffprobe_out);
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if(empty($webminfo['error'])) {
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$webminfo['width'] = $ffprobe_out['streams'][0]['width'];
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$webminfo['height'] = $ffprobe_out['streams'][0]['height'];
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}
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return $webminfo;
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}
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function is_valid_webm($ffprobe_out) {
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global $board, $config;
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if (empty($ffprobe_out))
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return array('code' => 1, 'msg' => $config['error']['genwebmerror']);
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if ($ffprobe_out['format']['format_name'] != 'matroska,webm')
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return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
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if ((count($ffprobe_out['streams']) > 1) && (!$config['webm']['allow_audio']))
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return array('code' => 3, 'msg' => $config['error']['webmhasaudio']);
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if ($ffprobe_out['streams'][0]['codec_name'] != 'vp8')
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return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
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if (empty($ffprobe_out['streams'][0]['width']) || (empty($ffprobe_out['streams'][0]['height'])))
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return array('code' => 2, 'msg' => $config['error']['invalidwebm']);
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if ($ffprobe_out['format']['duration'] > $config['webm']['max_length'])
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return array('code' => 4, 'msg' => $config['error']['webmtoolong']);
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}
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function make_webm_thumbnail($filename, $thumbnail, $width, $height) {
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global $board, $config;
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$ffmpeg = $config['webm']['ffmpeg_path'];
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$ffmpeg_out = array();
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exec("$ffmpeg -i $filename -v quiet -ss 00:00:00 -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnail 2>&1");
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return count($ffmpeg_out);
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}
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