/**
* Convert a stored video file to flashvideo
*
* @param array $pParamHash
* @access public
* @return TRUE on success, FALSE on failure - mErrors will contain reason for failure
*/
function mime_video_converter(&$pParamHash, $pOnlyGetParameters = FALSE)
{
global $gBitSystem;
// video conversion can take a while
ini_set("max_execution_time", "1800");
$ret = FALSE;
if (@BitBase::verifyId($pParamHash['attachment_id'])) {
// we might have some attachment preferences set if this is an update
LibertyMime::expungeAttachmentPreferences($pParamHash['attachment_id']);
// these are set in the liberty plugin admin screen
$ffmpeg = trim($gBitSystem->getConfig('ffmpeg_path', shell_exec('which ffmpeg')));
$width = trim($gBitSystem->getConfig('mime_video_width', 320));
$begin = date('U');
$log = $actionLog = array();
if (!is_executable($ffmpeg)) {
$log['time'] = date('Y-M-d - H:i:s O');
$log['duration'] = 0;
$log['message'] = 'ERROR: ffmpeg does not seem to be available on your system at: ' . $ffmpeg . ' Please set the path to ffmpeg in the liberty plugin administration screen.';
$actionLog['log_message'] = "ERROR: ffmpeg does not seem to be available on your system at: '{$ffmpeg}' Please set the path to ffmpeg in the liberty plugin administration screen.";
} else {
// this is the codec we'll use - currently this might be: flv, h264, h264-2pass
$codec = $gBitSystem->getConfig("mime_video_video_codec", "flv");
$source = STORAGE_PKG_PATH . $pParamHash['upload']['dest_branch'] . $pParamHash['upload']['name'];
$destPath = dirname($source);
// set some default values if ffpeg-php isn't available or fails
$default['aspect'] = 4 / 3;
$default['video_width'] = $width;
$default['video_height'] = round($width / 4 * 3);
$default['size'] = "{$default['video_width']}x{$default['video_height']}";
$default['offset'] = '00:00:10';
if (extension_loaded('ffmpeg')) {
// we silence these calls since they might spew errors
$movie = @new ffmpeg_movie($source);
$info = array('vcodec' => @$movie->getVideoCodec(), 'duration' => round(@$movie->getDuration()), 'width' => @$movie->getFrameWidth(), 'height' => @$movie->getFrameHeight(), 'video_bitrate' => @$movie->getVideoBitRate(), 'acodec' => @$movie->getAudioCodec(), 'audio_bitrate' => @$movie->getAudioBitRate(), 'audio_samplerate' => @$movie->getAudioSampleRate());
// make sure audio sample rate is valid
if (!empty($info['audio_samplerate']) && !in_array($info['audio_samplerate'], array(11025, 22050, 44100))) {
unset($info['audio_samplerate']);
}
} else {
// alternative method using ffmpeg to fetch source dimensions
$command = "{$ffmpeg} -i " . escapeshellarg($source) . ' 2>&1';
exec($command, $output, $status);
if (!preg_match('/Stream #(?:[0-9\\.]+)(?:.*)\\: Video: (?P<videocodec>.*) (?P<width>[0-9]*)x(?P<height>[0-9]*)/', implode('\\n', $output), $matches)) {
preg_match('/Could not find codec parameters \\(Video: (?P<videocodec>.*) (?P<width>[0-9]*)x(?P<height>[0-9]*)\\)/', implode('\\n', $output), $matches);
}
if (!empty($matches['width']) && !empty($matches['height'])) {
$info['width'] = $matches['width'];
$info['height'] = $matches['height'];
}
}
// our player supports flv and h264 so we might as well use the default
if (!$gBitSystem->isFeatureActive('mime_video_force_encode') && !empty($info) && ($info['vcodec'] == 'h264' && (empty($info['acodec']) || $info['acodec'] == 'mpeg4aac' || $info['acodec'] == 'aac') || $info['vcodec'] == 'flv' && (empty($info['acodec']) || $info['acodec'] == 'mp3'))) {
// work out what the target filename is
$extension = $info['vcodec'] == "flv" ? "flv" : "mp4";
$dest_file = $destPath . "/flick.{$extension}";
// if the video can be processed by ffmpeg-php, width and height are greater than 1
if (!empty($info['width']) && $info['width'] > 1) {
$info['aspect'] = $info['width'] / $info['height'];
$info['offset'] = strftime("%T", round($info['duration'] / 5 - 60 * 60));
} else {
$info = $default;
}
// store prefs and create thumbnails
LibertyMime::expungeMetaData($pParamHash['attachment_id']);
LibertyMime::storeMetaData($pParamHash['attachment_id'], 'Video', $info);
mime_video_create_thumbnail($source, $info['offset']);
if (!is_file($dest_file) && !link($source, $dest_file)) {
copy($source, $dest_file);
}
mime_video_fix_streaming($dest_file);
$log['message'] = 'SUCCESS: Converted to flash video';
$actionLog['log_message'] = "Video file was successfully uploaded and thumbnails extracted.";
$ret = TRUE;
} else {
// work out what the target filename is
$extension = $codec == "flv" ? "flv" : "mp4";
$dest_file = $destPath . "/flick.{$extension}";
// if the video can be processed by ffmpeg-php, width and height are greater than 1
if (!empty($info['width']) && $info['width'] > 1) {
// reset some values to reduce video size
if ($info['width'] < $width) {
$width = $info['width'];
}
// here we calculate the size and aspect ratio of the output video
$size_ratio = $width / $info['width'];
$info['aspect'] = $info['width'] / $info['height'];
$info['video_width'] = $width;
$info['video_height'] = round($size_ratio * $info['height']);
// height of video needs to be an even number
if ($info['video_height'] % 2) {
$info['video_height']++;
}
$info['size'] = "{$info['video_width']}x{$info['video_height']}";
} else {
$info = $default;
}
// transfer settings to vars for easy manipulation for various APIs of ffmpeg
$audio_bitrate = $gBitSystem->getConfig('mime_video_audio_bitrate', 32000) / 1000 . 'kb';
$audio_samplerate = $gBitSystem->getConfig('mime_video_audio_samplerate', 22050);
$video_bitrate = $gBitSystem->getConfig('mime_video_video_bitrate', 160000) / 1000 . 'kb';
$acodec_mp3 = $gBitSystem->getConfig('ffmpeg_mp3_lib', 'libmp3lame');
$me_param = $gBitSystem->getConfig('ffmpeg_me_method', 'me');
if ($codec == "h264") {
$parameters = " -i '{$source}'" . " -acodec libfaac" . " -ab {$audio_bitrate}" . " -ar {$audio_samplerate}" . " -vcodec libx264" . " -b {$video_bitrate}" . " -bt {$video_bitrate}" . " -s " . $info['size'] . " -aspect " . $info['aspect'] . " -flags +loop -cmp +chroma -refs 1 -coder 0 -me_range 16 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -maxrate 10M -bufsize 10M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30" . " -partitions +parti4x4+partp8x8+partb8x8 -{$me_param} epzs -subq 5 -trellis 1" . " -y '{$dest_file}'";
} elseif ($codec == "h264-2pass") {
// it is not possible to pass in the path for the x264 log file and it is always generated in the working dir.
$cwd = getcwd();
chdir(dirname($dest_file));
$passlogfile = dirname($dest_file) . "/ffmpeg2pass";
// pass 1
$parameters = " -i '{$source}'" . " -an" . " -pass 1" . " -passlogfile {$passlogfile}" . " -vcodec libx264" . " -b {$video_bitrate}" . " -bt {$video_bitrate}" . " -s " . $info['size'] . " -aspect " . $info['aspect'] . " -flags +loop -cmp +chroma -refs 1 -coder 0 -me_range 16 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bf 16 -maxrate 10M -bufsize 10M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30" . " -partitions 0 -{$me_param} epzs -subq 1 -trellis 0" . " -y '{$dest_file}'";
// pass 2
$parameters2 = " -i '{$source}'" . " -acodec libfaac" . " -ab {$audio_bitrate}" . " -ar {$audio_samplerate}" . " -pass 2" . " -passlogfile {$passlogfile}" . " -vcodec libx264" . " -b {$video_bitrate}" . " -bt {$video_bitrate}" . " -s " . $info['size'] . " -aspect " . $info['aspect'] . " -flags +loop -cmp +chroma -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4" . " -partitions +parti8x8+parti4x4+partp8x8+partp4x4+partb8x8 -flags2 +brdo+dct8x8+wpred+bpyramid+mixed_refs -{$me_param} epzs -subq 7 -trellis 1 -refs 6 -bf 16 -directpred 3 -b_strategy 1 -bidir_refine 1 -coder 1" . " -y '{$dest_file}'";
} else {
$parameters = " -i '{$source}'" . " -acodec {$acodec_mp3}" . " -ab {$audio_bitrate}" . " -ar {$audio_samplerate}" . " -f flv" . " -b {$video_bitrate}" . " -bt {$video_bitrate}" . " -s " . $info['size'] . " -aspect " . $info['aspect'] . " -y '{$dest_file}'";
}
if ($pOnlyGetParameters) {
return $parameters;
} else {
// we keep the output of this that we can store it to the error file if we need to do so
$debug = shell_exec("{$ffmpeg} {$parameters} 2>&1");
if (!empty($parameters2)) {
$debug .= shell_exec("{$ffmpeg} {$parameters2} 2>&1");
// change back to whence we came
chdir($cwd);
}
}
// make sure the conversion was successfull
if (is_file($dest_file) && filesize($dest_file) > 48) {
mime_video_fix_streaming($dest_file);
// try to work out a reasonable timepoint where to extract a screenshot
if (preg_match('!Duration: ([\\d:\\.]*)!', $debug, $time)) {
list($h, $m, $s) = explode(':', $time[1]);
$seconds = round(60 * 60 * (int) $h + 60 * (int) $m + (double) $s);
// we need to subract one hour from our time for strftime to return the correct value
$info['offset'] = strftime("%T", round($seconds / 5 - 60 * 60));
} else {
$info['offset'] = "00:00:10";
}
// store some video specific settings
LibertyMime::expungeMetaData($pParamHash['attachment_id']);
LibertyMime::storeMetaData($pParamHash['attachment_id'], 'Video', $info);
// since the flv conversion worked, we will create a preview screenshots to show.
mime_video_create_thumbnail($dest_file, $info['offset']);
$log['message'] = 'SUCCESS: Converted to flash video';
$actionLog['log_message'] = "Converted to flashvideo in " . (date('U') - $begin) . " seconds";
$ret = TRUE;
} else {
// remove unsuccessfully converted file
@unlink($dest_file);
$log['message'] = "ERROR: The video you uploaded could not be converted by ffmpeg.\nDEBUG OUTPUT:\n\n" . $debug;
$actionLog['log_message'] = "Video could not be converted to flashvideo. An error dump was saved to: " . $destPath . '/error';
// write error message to error file
$h = fopen($destPath . "/error", 'w');
fwrite($h, "{$ffmpeg} {$parameters}\n\n{$debug}");
fclose($h);
}
@unlink($destPath . '/processing');
}
}
$log['time'] = date('d/M/Y:H:i:s O');
$log['duration'] = date('U') - $begin;
// we'll insert some info into the database for reference
$actionLog['content_id'] = $pParamHash['content_id'];
$actionLog['title'] = "Uploaded file: {$pParamHash['upload']['name']} [Attchment ID: {$pParamHash['attachment_id']}]";
// if this all goes t**s up, we'll know why
$pParamHash['log'] = $log;
// we'll add an entry in the action logs
LibertyContent::storeActionLogFromHash(array('action_log' => $actionLog));
// return the log
$pParamHash['log'] = $log;
}
return $ret;
}