function save($filename, $start = 0)
{
$c = new Naf_ShellCmd($this->command);
$c->addOption('-i', $this->source);
$c->addOption('-f', 'image2');
$c->addOption('-vframes', 1);
$c->addOptionIf($start, '-ss', $start);
$c->addOptionIf($this->width && $this->height, '-s', $this->width . 'x' . $this->height);
if (null === $filename) {
$c->setTarget('-');
// flush picture to STDOUT
try {
return $c->exec();
} catch (Naf_Exception $e) {
throw new Naf_Media_Exception("Snapshot failed! " . $e->getMessage());
}
} else {
$c->setTarget($filename);
// save to file
try {
$c->exec();
return;
} catch (Naf_Exception $e) {
throw new Naf_Media_Exception("Snapshot failed! " . $e->getMessage());
}
}
}
/**
* Convert media according to specifications in $this->outputInfo.
*
* @param string $filename - passed by reference because sometimes there is a need to change the filename,
* or otherwise the backend will produce an error
* @return Naf_Media_Info - information for the newly created
* @throws Naf_Media_Exception
*/
function convert(&$filename, $start = 0, $duration = null)
{
$c = new Naf_ShellCmd($this->command);
$format = $this->outputInfo->getFormat();
if ($format) {
$ext = substr($filename, strrpos($filename, '.') + 1);
if ($ext != $format) {
$filename .= '.' . $format;
}
} else {
$ext = substr($this->source, strrpos($this->source, '.') + 1);
$filename .= '.' . $ext;
}
$c->addOption('-i', $this->source);
$c->setTarget($filename);
$c->addOptionIf($start, '-ss', $start);
$c->addOptionIf($duration, '-t', $duration);
if (($width = $this->outputInfo->getWidth()) && ($height = $this->outputInfo->getHeight())) {
$c->addOption('-s', $width . 'x' . $height);
}
$bitrate = $this->outputInfo->getBitrate();
$c->addOptionIf($bitrate, '-b', (int) $bitrate . "k");
try {
$c->exec();
} catch (Naf_Exception $e) {
throw new Naf_Media_Exception("Ffmpeg call failed: " . $e->getMessage() . "\nCommand: " . $c->getLastCommannd());
}
return Naf_Media::reader()->info($filename);
}
function save($filename, $start = 0)
{
$c = new Naf_ShellCmd($this->command);
$c->setTarget($this->source);
$c->addOption('-vo', 'jpeg:outdir=' . $this->tmpDir);
$c->addOption('-nosound');
$c->addOption('-frames', 2);
$c->addOptionIf($start, '-ss', $start);
$c->addOptionIf($this->width && $this->height, '-vf', 'scale=' . $this->width . ':' . $this->height);
try {
$c->exec();
} catch (Naf_Exception $e) {
throw new Naf_Media_Exception("Snapshot failed! " . $e->getMessage());
}
@unlink($this->tmpDir . '/00000001.jpg');
$image = $this->tmpDir . '/00000002.jpg';
if ($filename) {
rename($image, $filename);
return;
} else {
$return = file_get_contents($image);
@unlink($image);
return $return;
}
}
/**
* Read media file information.
*
* @param string filename
* @return Naf_Media_Info
*/
function info($filename)
{
$i = new Naf_Media_Info($filename);
$cmd = new Naf_ShellCmd($this->command);
$cmd->addOption('-identify');
$cmd->addOption('-frames', 0);
$cmd->addOption('-ao', 'null');
$cmd->addOption('-vo', 'null');
$cmd->setTarget($filename);
$infoText = $cmd->exec();
$w = $h = 0;
foreach (preg_split("/\r\n|\r|\n/", $infoText) as $line) {
if (preg_match("/^ID_([^\\=]+)=(.+)\$/", $line, $matches)) {
$key = $matches[1];
$value = $matches[2];
if (0 === strpos($key, 'VIDEO')) {
$i->setHasVideo(true);
} elseif (0 === strpos($key, 'AUDIO')) {
$i->setHasAudio(true);
}
switch ($key) {
case "VIDEO_WIDTH":
$w = (int) $value;
break;
case "VIDEO_HEIGHT":
$h = (int) $value;
break;
case "VIDEO_FPS":
$i->setFps($value);
break;
case "AUDIO_BITRATE":
$i->setAudioBitrate($value / 1000);
break;
case "AUDIO_RATE":
$i->setSamplingRate($value);
break;
case "LENGTH":
$i->setDuration($value);
break;
case "AUDIO_CODEC":
$i->setAudioCodec($value);
break;
case "VIDEO_CODEC":
$i->setVideoCodec($value);
break;
default:
break;
}
} elseif (preg_match("/^([^\\s]+) file format detected/", $line, $matches)) {
$i->setFormat($matches[1]);
}
}
if ($i->hasVideo()) {
$i->setPixelSize($w, $h);
$duration = $i->getDuration();
if (0 == $duration) {
// experimentally it has been found that 5 seconds will be ok here...
$duration = 5;
}
$i->setBitrate(filesize($filename) / 1024 * 8 / $duration);
}
return $i;
}
