我试图将原始文件发送到google speech api，但我不知道如何加载原始文件以便将其放入RecognitionAudio json，任何想法？
这是我现在的代码：
import 'package:flutter/services.dart';
import 'package:googleapis/speech/v1.dart';
import 'package:googleapis_auth/auth_io.dart';
void main() {
clientViaServiceAccount(_credentials, _SCOPES).then((http_client) async {
var speech = new SpeechApi(http_client);
RecognizeRequest r = new RecognizeRequest();
String content = await rootBundle.loadString('assets/res/audio.raw');
RecognitionAudio audio = new RecognitionAudio.fromJson({ 'content': content});
r.audio = audio;
RecognitionConfig config = new RecognitionConfig.fromJson({
'languageCode' : 'en-US',
'encoding' : 'LINEAR16',
'sampleRateHertz' : 44100,
});
r.config = config;
speech.speech.recognize(r).then((results) {
for (var result in results.results) {
print(result.toString());
}
});
});
}
并在pubspec.yaml上添加了
assets:
- assets/res/audio.raw
这是控制台中的错误 E / flutter（3740）：[错误：flutter / runtime / dart_init.cc（167）]隔离
(169749064) 'flutter_assets:_spawn()' exited with an error
E/flutter ( 3740): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter ( 3740): FormatException: Bad UTF-8 encoding 0xff (at offset 1)
E/flutter ( 3740): #0 _Utf8Decoder.convert (dart:convert/utf.dart:574)
E/flutter ( 3740): #1 Utf8Decoder.convert (dart:convert/utf.dart:350)
E/flutter ( 3740): #2 Utf8Codec.decode (dart:convert/utf.dart:72)
E/flutter ( 3740): #3 CachingAssetBundle._utf8decode (package:flutter/src/services/asset_bundle.dart:172)
E/flutter ( 3740): #4 _spawn.<anonymous closure> (package:flutter/src/foundation/isolates.dart:94)
E/flutter ( 3740): #5 Timeline.timeSync (dart:developer/timeline.dart:168)
E/flutter ( 3740): #6 _spawn (package:flutter/src/foundation/isolates.dart:91)
E/flutter ( 3740): #7 _startIsolate.<anonymous closure> (dart:isolate-patch/dart:isolate/isolate_patch.dart:282)
E/flutter ( 3740): #8 _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)
E/flutter ( 3740): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter ( 3740): DetailedApiRequestError(status: 400, message: RecognitionAudio not set.)
E/flutter ( 3740): #0 _validateResponse.<anonymous closure> (package:_discoveryapis_commons/src/clients.dart:880)
E/flutter ( 3740): #1 _RootZone.runUnary (dart:async/zone.dart:1381)
E/flutter ( 3740): #2 _FutureListener.handleValue (dart:async/future_impl.dart:129)
E/flutter ( 3740): #3 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:633)
E/flutter ( 3740): #4 _Future._propagateToListeners (dart:async/future_impl.dart:662)
E/flutter ( 3740): #5 _Future._complete (dart:async/future_impl.dart:467)
E/flutter ( 3740): #6 _cancelAndValue (dart:async/stream_pipe.dart:63)
E/flutter ( 3740): #7 Stream.first.<anonymous closure> (dart:async/stream.dart:1158)
E/flutter ( 3740): #8 _RootZone.runUnaryGuarded (dart:async/zone.dart:1316)
E/flutter ( 3740): #9 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:330)
E/flutter ( 3740): #10 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:257)
E/flutter ( 3740): #11 _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:68)
E/flutter ( 3740): #12 _EventSinkWrapper.add (dart:async/stream_transformers.dart:15)
E/flutter ( 3740): #13 _JsonStringDecoderSink.close (dart:convert-patch/dart:convert/convert_patch.dart:1459)
E/flutter ( 3740): #14 _ConverterStreamEventSink.close (dart:convert/chunked_conversion.dart:94)
E/flutter ( 3740): #15 _SinkTransformerStreamSubscription._handleDone (dart:async/stream_transformers.dart:141)
E/flutter ( 3740): #16 _RootZone.runGuarded (dart:async/zone.dart:1304)
E/flutter ( 3740): #17 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:383)
E/flutter ( 3740): #18 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:393)
E/flutter ( 3740): #19 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:277)
E/flutter ( 3740): #20 _SinkTransformerStreamSubscription._close (dart:async/stream_transformers.dart:96)
E/flutter ( 3740): #21 _EventSinkWrapper.close (dart:async/stream_transformers.dart:23)
E/flutter ( 3740): #22 _StringAdapterSink.close (dart:convert/string_conversion.dart:281)
E/flutter ( 3740): #23 _Utf8ConversionSink.close (dart:convert/string_conversion.dart:336)
E/flutter ( 3740): #24 _ConverterStreamEventSink.close (dart:convert/chunked_conversion.dart:94)
E/flutter ( 3740): #25 _SinkTransformerStreamSubscription._handleDone (dart:async/stream_transformers.dart:141)
E/flutter ( 3740): #26 _RootZone.runGuarded (dart:async/zone.dart:1304)
E/flutter ( 3740): #27 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:383)
E/flutter ( 3740): #28 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:393)
E/flutter ( 3740): #29 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:277)
E/flutter ( 3740): #30 _ForwardingStream._handleDone (dart:async/stream_pipe.dart:106)
E/flutter ( 3740): #31 _ForwardingStreamSubscription._handleDone (dart:async/stream_pipe.dart:172)
E/flutter ( 3740): #32 _RootZone.runGuarded (dart:async/zone.dart:1304)
E/flutter ( 3740): #33 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:383)
E/flutter ( 3740): #34 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:393)
E/flutter ( 3740): #35 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:277)
E/flutter ( 3740): #36 _SinkTransformerStreamSubscription._close (dart:async/stream_transformers.dart:96)
E/flutter ( 3740): #37 _EventSinkWrapper.close (dart:async/stream_transformers.dart:23)
E/flutter ( 3740): #38 _ByteAdapterSink.close (dart:convert/byte_conversion.dart:70)
E/flutter ( 3740): #39 _FilterSink.close (dart:io/data_transformer.dart:604)
E/flutter ( 3740): #40 _ConverterStreamEventSink.close (dart:convert/chunked_conversion.dart:94)
E/flutter ( 3740): #41 _SinkTransformerStreamSubscription._handleDone (dart:async/stream_transformers.dart:141)
E/flutter ( 3740): #42 _RootZone.runGuarded (dart:async/zone.dart:1304)
E/flutter ( 3740): #43 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:383)
E/flutter ( 3740): #44 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:393)
E/flutter ( 3740): #45 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:277)
E/flutter ( 3740): #46 _ForwardingStream._handleDone (dart:async/stream_pipe.dart:106)
E/flutter ( 3740): #47 _ForwardingStreamSubscription._handleDone (dart:async/stream_pipe.dart:172)
E/flutter ( 3740): #48 _RootZone.runGuarded (dart:async/zone.dart:1304)
E/flutter ( 3740): #49 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:383)
E/flutter ( 3740): #50 _BufferingStreamSubscrip
我猜我加载内容的方式是错误的