audio-master
所属分类：多媒体编程
开发工具：HTML
文件大小：6569KB
下载次数：1
上传日期：2016-04-22 14:44:29
上 传 者：
lasoqw
说明： Waveform
With the Jasny\Audio\Waveform class you can create a waveform as PNG like:
文件列表:
LICENSE (1071, 2015-06-01)
apigen.neon (1635, 2015-06-01)
composer.json (573, 2015-06-01)
demo (0, 2015-06-01)
demo\js (0, 2015-06-01)
demo\js\waveform.js (8034, 2015-06-01)
demo\player.html (5542, 2015-06-01)
demo\track.php (396, 2015-06-01)
demo\tracks (0, 2015-06-01)
demo\tracks\demo.wav (170800, 2015-06-01)
demo\tracks\song.mp3 (6562944, 2015-06-01)
demo\waveform.php (358, 2015-06-01)
demo\waveformjs.html (939, 2015-06-01)
src (0, 2015-06-01)
src\Jasny (0, 2015-06-01)
src\Jasny\Audio (0, 2015-06-01)
src\Jasny\Audio\Track.php (7782, 2015-06-01)
src\Jasny\Audio\Waveform.php (7670, 2015-06-01)
Jasny Audio
===========
Process audio files using [SoX](http://sox.sourceforge.net/)
## Waveform
With the Jasny\Audio\Waveform class you can create a waveform as PNG like:
```php
$waveform = new Waveform($filename, $options);
$waveform->output();
```
Alternatively you can request a set of samples. This can be used to set draw a wavefrom in JavaScript (see waveform.js).
### Options
option | default | unit | description
---------|---------|-------------|-----------------------------------------
width | 1800 | pixels | Image width
height | 280 | pixels | Image height
color | 000000 | hex or rgba | Color of the graph
axis | null | hex or rgba | Color of the x axis
level | null | | The max amplitute (y axis)
offset | null | seconds | Starting point. Negative counts from end
duration | null | seconds | Duration of the track of chart
## Track statistics
```php
$track = new Track($filename);
$track->getStats();
```
```json
{
channels: "1",
dc_offset: "0.000016",
min_level: "-0.162134",
max_level: "0.153157",
pk_lev: "-15.80",
rms_lev: "-33.56",
rms_pk: "-24.31",
rms_tr: "-55.44",
crest_factor: "7.72",
flat_factor: "0.00",
pk_count: "2",
bit_depth: "30/32",
length: "1.935601",
scale_max: "1.000000",
window: "0.050",
samples: "42680",
scaled_by: "2147483***7.0",
maximum_amplitude: "0.153157",
minimum_amplitude: "-0.162134",
midline_amplitude: "-0.004489",
mean_norm: "0.010709",
mean_amplitude: "0.000016",
rms_amplitude: "0.020990",
maximum_delta: "0.115579",
minimum_delta: "0.000000",
mean_delta: "0.003656",
rms_delta: "0.008325",
rough_frequency: "1391",
volume_adjustment: "6.168",
sample_rate: "22050"
}
```
## Convert track
Convert a track to a different format. Uses avconv (or ffmpeg).
```php
$track = new Track("sometrack.wav");
$track->convert("sometrack.mp3");
```
## Combine tracks
Combine two tracks. Uses [`sox --combine`](http://sox.sourceforge.net/sox.html#OPTIONS).
Available methods
* concatenate
* merge
* mix
* mix-power
* multiply
* sequence
```php
$track = new Track($track1);
$track->combine($method, $track2, $outputFilename);
```
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