短于1分钟的音频文件转录没有问题,但当我尝试转录较长的文件时,Google语音API会返回空响应。Google云语音API将不会返回超过1分钟的音频
我让使用下面的命令SOX我的.wav文件:
sox input.flac --channels=1 --bits=16 --rate=16000 --encoding=signed-integer --endian=little output.wav
的文件播放预期。运行SoXi,我得到以下信息:
Input File : 'output.wav'
Channels : 1
Sample Rate : 16000
Precision : 16-bit
Duration : 00:02:35.71 = 2491408 samples ~ 11678.5 CDDA sectors
File Size : 4.98M
Bit Rate : 256k
Sample Encoding: 16-bit Signed Integer PCM
然后我把它上传到我的谷歌存储,因为文件指出,任何文件大于1分钟都必须能驻留在GS桶抄写它的API。
我然后运行下面的代码段以开始转录操作:
use \Google\Cloud\ServiceBuilder;
$cloud = new ServiceBuilder([
'keyFilePath' => '/var/www/cert/gcloud_key.json',
'projectId' => 'm****n-141000'
]);
$speech = $cloud->speech();
$operation = $speech->beginRecognizeOperation(
"gs://m****n-141000.appspot.com/output.wav", [
'encoding' => 'LINEAR16',
'sampleRate' => 16000
]);
$isComplete = $operation->isComplete();
while (!$isComplete) {
sleep(1);
$operation->reload();
$isComplete = $operation->isComplete();
}
var_dump($operation->results());
响应回来是空的。完整响应如下所示:
object(stdClass)#27 (4) {
["name"]=>
string(19) "1904326252537199795"
["metadata"]=>
object(stdClass)#24 (4) {
["@type"]=>
string(70) "type.googleapis.com/google.cloud.speech.v1beta1.AsyncRecognizeMetadata"
["progressPercent"]=>
int(100)
["startTime"]=>
string(27) "2017-01-02T09:36:45.780425Z"
["lastUpdateTime"]=>
string(27) "2017-01-02T09:36:46.720260Z"
}
["done"]=>
bool(true)
["response"]=>
object(stdClass)#26 (1) {
["@type"]=>
string(70) "type.googleapis.com/google.cloud.speech.v1beta1.AsyncRecognizeResponse"
}
}
建议请求运行并成功完成,但没有任何实际响应。我哪里错了?