aws sdk cpp sample for transcribe stopped working

[nicksimultec]

Confirm by changing [ ] to [x] below to ensure that it's a bug:

• [x ] I've gone though Developer Guide and API reference
• [ x] I've searched for previous similar issues and didn't find any solution

Describe the bug
I am following the transcribe cpp sample from the following site
https://aws.amazon.com/blogs/developer/real-time-streaming-transcription-with-the-aws-c-sdk/
two months ago the sample was working and I got after two months to run it again and it stopped. When I debug the app it never goes in CaptureAudio call which is part of the request for OnStreamReady call. Any hints?

SDK version number
AWS SDK for C++ with Version:1.8.126

Platform/OS/Hardware/Device
Windows10

To Reproduce (observed behavior)
https://aws.amazon.com/blogs/developer/real-time-streaming-transcription-with-the-aws-c-sdk/

Expected behavior
AS it used to work, to get the audio sent and get the transcription back

Logs/output
If applicable, add logs or error output.

To enable logging, set the following system properties:

REMEMBER TO SANITIZE YOUR PERSONAL INFO

options.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Trace;
Aws::InitAPI(options)

Additional context
Add any other context about the problem here.

[alanee1996]

👍🏼

[nicksimultec]

forgot to post the log

[TRACE] 2021-10-30 23:08:11.371 Aws::Utils::Event::EventStreamDecoder [19820] Message received, the expected length of the message is: 188 bytes, and the expected length of the header is: 97 bytes
[WARN] 2021-10-30 23:08:11.371 StartStreamTranscriptionHandler [19820] Encountered AWSError 'BadRequestException': A complete signal was sent without the preceding empty frame.
[TRACE] 2021-10-30 23:08:11.371 StartStreamTranscriptionHandler [19820] TranscribeStreamingService Errors received, HTTP response code: -1
Resolved remote host IP address:
Request ID:
Exception name: BadRequestException
Error message: A complete signal was sent without the preceding empty frame.

[nicksimultec]

more from the log. I am also in talk with the amazon support and they pointed to this

20211105/eu-west-2/transcribe/aws4_request
88e84974bedb85ee4cc6361509c802c577bab3bd618e16484d479d3e9db90bb9
0ba86d758950095113badd553e10b65de77fa5fcfc0b7f9c252c3dc2242dc24e
68af7ea433502b33aa30793fad4dbdaf149a930fcb2f3fc4e8af6a1e47d2c762
[DEBUG] 2021-11-05 01:06:20.926 AWSAuthEventStreamV4Signer [12748] Final computed signing hash: a35f881f9e40e9d25683f02309695cb0366d7a02a6109bbfb1e054acd94d14ca
[INFO] 2021-11-05 01:06:20.926 AWSAuthEventStreamV4Signer [12748] Event chunk final signature - a35f881f9e40e9d25683f02309695cb0366d7a02a6109bbfb1e054acd94d14ca
[WARN] 2021-11-05 01:06:20.927 WinInetSyncHttpClient [20652] Send request failed: The connection with the server was reset

[DEBUG] 2021-11-05 01:06:20.927 WinInetSyncHttpClient [20652] Closing http request handle 0000000000CC0010
[DEBUG] 2021-11-05 01:06:20.927 WinInetSyncHttpClient [20652] Releasing connection handle 0000000000CC000C
[DEBUG] 2021-11-05 01:06:20.927 WinInetConnectionPoolMgr [20652] Releasing connection to endpoint transcribestreaming.eu-west-2.amazonaws.com:443
[DEBUG] 2021-11-05 01:06:20.927 AWSClient [20652] Request returned error. Attempting to generate appropriate error codes from response
[ERROR] 2021-11-05 01:06:20.927 AWSClient [20652] HTTP response code: -1
Resolved remote host IP address:
Request ID:
Exception name:
Error message: Encountered network error when sending http request
0 response headers:

[KaibaLopez]

Hi @nicksimultec ,
Yea we seem to have a problem with the transcribe streaming sample specific to windows. Working on it...

[trajcenikolovnick]

Hi @KaibaLopez,

any progress? Thank you

[kanishkaherath]

Hi @KaibaLopez,
I'm also getting the same issue. Any updates from your end?

Thanks
Kanishka

[ambitslix]

Confirming the same issue under Linux/Ubuntu & Fedora with v1.9.231.

Any workarounds? From the trace it seems that the stream format has changed needing sample headers?

[Redrield]

Reproduced on Windows 11 21H2. +1 on wondering if there are workarounds for this

[ambitslix]

It looks like there's not much attention on this issue, so I'm thinking about looking at it myself. It probably works with the other SDKs so I would look and see what's the difference. Not sure when I would have enough time to investigate.

[ks7585]

@ambitslix I'm getting the same error. Any luck bypassing the issue?

[AKumkov]

Same issue on Windows 10. We wanted to integrate our Clarity PBX with the Amazon Transcribe engine and had no luck. Hope development will not ignore the problem. I debugged it from different sides building from sources and switching between different HttpClients. It looks like WinHttp/WinInet libs are not switching to HTTP/2, though in code the flag is specified. And from the other side "Transfer-Encoding: chunked" header is not allowed according to HTTP/2. But WinHttp library does not send the request if neither "Content-Length" nor "Transfer-Encoding" is specified. So I hacked the code a bit to start it working. In the documentation, the recommended way is to use WebSockets, but there is no support for it in the SDK. It looks like Amazon does not invest in the project and it is deprecated.
Found following duplicate issues: #1743 #1599 #1805 #1747