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@ -3,60 +3,61 @@ |
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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'] = $ffprobe_out['streams'][0]['height']; |
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$webminfo['duration'] = $ffprobe_out['format']['duration']; |
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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' => $config['error']['invalidwebm']); |
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$extension = pathinfo($ffprobe_out['format']['filename'], PATHINFO_EXTENSION); |
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if ($extension === 'webm') { |
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if ($ffprobe_out['format']['format_name'] != 'matroska,webm') |
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return array('code' => 2, 'msg' => $config['error']['invalidwebm']); |
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} elseif ($extension === 'mp4') { |
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if ($ffprobe_out['streams'][0]['codec_name'] != 'h264' && $ffprobe_out['streams'][1]['codec_name'] != 'aac') |
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return array('code' => 2, 'msg' => $config['error']['invalidwebm']); |
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} else { |
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return array('code' => 1, 'msg' => $config['error']['genwebmerror']); |
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} |
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if ((count($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' => $config['error']['webmtoolong']); |
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return array('code' => 4, 'msg' => sprintf($config['error']['webmtoolong'], $config['webm']['max_length'])); |
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} |
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function make_webm_thumbnail($filename, $thumbnail, $width, $height) { |
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function make_webm_thumbnail($filename, $thumbnail, $width, $height, $duration) { |
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global $board, $config; |
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$filename = escapeshellarg($filename); |
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$thumbnail = escapeshellarg($thumbnail); // Should be safe by default but you |
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$thumbnailfc = escapeshellarg($thumbnail); // Should be safe by default but you |
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// can never be too safe. |
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$ffmpeg = $config['webm']['ffmpeg_path']; |
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$ret = 0; |
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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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exec("$ffmpeg -strict -2 -ss " . floor($duration / 2) . " -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnailfc 2>&1", $ffmpeg_out, $ret); |
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// Work around for https://trac.ffmpeg.org/ticket/4362 |
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if (filesize($thumbnail) === 0) { |
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// try again with first frame |
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exec("$ffmpeg -y -strict -2 -ss 0 -i $filename -v quiet -an -vframes 1 -f mjpeg -vf scale=$width:$height $thumbnailfc 2>&1", $ffmpeg_out, $ret); |
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clearstatcache(); |
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// failed if no thumbnail size even if ret code 0, ffmpeg is buggy |
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if (filesize($thumbnail) === 0) { |
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$ret = 1; |
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} |
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} |
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return $ret; |
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} |
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