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(PHP 4 >= 4.3.3)
SWFMovie->streamMP3 — Streams a MP3 file
Diese Funktion ist EXPERIMENTELL. Das Verhalten, der Funktionsname und alles Andere, was hier dokumentiert ist, kann sich in zukünftigen PHP-Versionen ohne Ankündigung ändern. Seien Sie gewarnt und verwenden Sie diese Funktion auf eigenes Risiko.
Streams the given MP3 file mp3file.
This method is not very robust in dealing with oddities (can skip over an initial ID3 tag, but that's about it).
Note that the movie isn't smart enough to put enough frames in to contain the entire mp3 stream- you'll have to add (length of song * frames per second) frames to get the entire stream in.
Can be a file pointer returned by fopen() or the MP3 data, as a binary string.
Number of seconds to skip.
Return number of frames.
| Version | Beschreibung |
|---|---|
| 5.2.0 | skip added |
Beispiel #1 Streaming example
<?php
$m = new SWFMovie();
$m->setRate(12.0);
$m->streamMp3(file_get_contents("distortobass.mp3"));
// use your own MP3
// The file is 11.85 seconds at 12.0 fps = 142 frames
$m->setFrames(142);
header('Content-type: application/x-shockwave-flash');
$m->output();
?>
Hey all,
For those using Ming 0.3 (like me), there is a way to calculate the length of the MP3 you are using. It might be a bit iffy for VBR files, but it seems to work well for the files I've tested thus far. The process of calculating the frame length (and size) is detailed at http://www.mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm
<?php
function get_mp3_len ($file) {
$rate1=array(0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, "bad");
$rate2=array(0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, "bad");
$rate3=array(0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, "bad");
$rate4=array(0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, "bad");
$rate5=array(0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, "bad");
$bitrate=array(
'1' => $rate5,
'2' => $rate5,
'3' => $rate4,
'9' => $rate5,
'10' => $rate5,
'11' => $rate4,
'13' => $rate3,
'14' => $rate2,
'15' => $rate1
);
$sample=array(
'0' => 11025,
'1' => 12000,
'2' => 8000,
'8' => 22050,
'9' => 24000,
'10' => 16000,
'12' => 44100,
'13' => 48000,
'14' => 32000
);
$fd=fopen($file, 'rb');
$header=fgets($fd, 5);
fclose($fd);
$bits="";
while (strlen($header) > 0) {
//var_dump($header);
$bits.=str_pad(base_convert(ord($header{0}), 10, 2), 8, '0', STR_PAD_LEFT);
$header=substr($header, 1);
}
$bits=substr($bits, 11); // lets strip the frame sync bits first.
$version=substr($bits, 0, 2); // this gives us the version
$layer=base_convert(substr($bits, 2, 2), 2, 10); // this gives us the layer
$verlay=base_convert(substr($bits, 0, 4), 2, 10); // this gives us both
$rateidx=base_convert(substr($bits, 5, 4), 2, 10); // this gives us the bitrate index
$sampidx=base_convert($version.substr($bits, 9, 2), 2, 10); // this gives the sample index
$padding=substr($bits, 11, 1); // are we padding frames?
$rate=$bitrate[$verlay][$rateidx];
$samp=$sample[$sampidx];
$framelen=0;
$framesize=384; // Size of the frame in samples
if ($layer == 3) { // layer 1?
$framelen=(12 * ($rate * 1000) / $samp + $padding) * 4;
} else { // Layer 2 and 3
$framelen=144 * ($rate * 1000) / $samp + $padding;
$framesize=1152;
}
$headerlen=4 + ($bits{4} == 0 ? '2' : '0');
return (filesize($file) - $headerlen) / $framelen / ($samp / $framesize);
}
?>
Seems that this function only handles some MP3 files with specified sample rates and not others. 44100 and 21050 work. With the lame MP3 converter, this is obtained with setting the "bit rate" at 112 (average compression/quality), mono or stereo. Other values may work, probably multiples, I did not tried all.
If you need to play an mp3 fully you need to do something like:
<?php
$len = $m->streamMp3(fopen("sound.mp3", "r"));
$m->setFrames($len);
?>
This works only in Ming 0.4. I'm not 100% sure but it doesn't sound to work on Ming 0.3
if you want to control the sound use these functions like this:
<?php
$m -> add(new SWFAction('
stop(); // pauses the song
goToAndStop(1); // stops the song, and goes back to the beginning
play(); // plays the song from current position
'));
?>
i hope this is helpful
Don't forget to use fopen function in example above !
Use
<?php
$m->streamMp3(fopen("distortobass.mp3", "rb"));
instead of
$m->streamMp3("distortobass.mp3");
?>
I hope this is useful for you :)
a nice feature to handle Id3tag is to get support from Unix mp3info command into a returning exec parsing
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