save audio to file

in Using Cinder • 2 years ago

hi,

I'm a new comer with Cinder, I have a problem about save audio to file. The code is as below:

the file record0.wav can be created with 0 bytes, but the code always interrupt with error "R6010 -abort() has been called".

I guess the extension value is not correct. but I can't see the "create" realization in TargetFile class.

Could some one give me some hints?

fs::path filePath = "d:\\record0.wav";

string extension = "";

size_t sampleRate = mMonitorSpectralNode->getNumChannels();

size_t numChannels = mMonitorSpectralNode->getSampleRate();

mTargetFile->create(filePath, sampleRate, numChannels, audio::SampleType::INT_16, extension);

audio::Buffer buffer = mMonitorSpectralNode->getBuffer();

mTargetFile->write(&buffer);

Replies(8)

桂芳11

回复: save audio to file

2 years ago

the debug error is :

TargetFileMediaFoundation: Failed to create SinkWriter from URL: d:\\record.wav

Is the path "d:\\record.wav" not appropriate？？

rich.e

For one, it looks like you've got your samplerRate and numChannels switched. Also, try with a file path like 'record0.wav' or something and see if that works for you (it should make the file right next to your .exe). I don't know of any reason why 'd:\\record0.wav' wouldn't work, but I'd start to simplify to find where the problem is if it were me.

cheers,

Rich

桂芳11

回复: save audio to file

2 years ago

hi Rich,

Thanks for your reply.

I have tried 'record0.wav'. The file is created, but still has the error : "TargetFileMediaFoundation: Failed to create SinkWriter from URL: record0.wav".

The project is created by TinderBox, I tried both OpenGL basic template with FMOD lib and FMOD basic template with FMOD lib. Both the two projects failed to create SinkWriter.

Is there anything wrong about the project setting ?

'CinderProject3.exe' (Win32): Loaded 'C:\Windows\SysWOW64\atigktxx.dll'. Cannot find or open the PDB file.

'CinderProject3.exe' (Win32): Loaded 'C:\Windows\SysWOW64\ole32.dll'. Symbols loaded.

'CinderProject3.exe' (Win32): Unloaded 'C:\Windows\SysWOW64\ole32.dll'

'CinderProject3.exe' (Win32): Loaded 'C:\Windows\SysWOW64\clbcatq.dll'. Symbols loaded.

'CinderProject3.exe' (Win32): Loaded 'C:\Windows\SysWOW64\MMDevAPI.dll'. Symbols loaded.

'CinderProject3.exe' (Win32): Loaded 'C:\Windows\SysWOW64\AudioSes.dll'. Symbols loaded.

First-chance exception at 0x76CAC52F in CinderProject3.exe: Microsoft C++ exception: cinder::audio::AudioFileExc at memory location 0x0018C2D0.

|error | cinder::app::AppBase::executeLaunch[137] Uncaught exception, type: class cinder::audio::AudioFileExc, what : TargetFileMediaFoundation: Failed to create SinkWriter from URL: record.wav

First-chance exception at 0x76CAC52F in CinderProject3.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.

Unhandled exception at 0x76CAC52F in CinderProject3.exe: Microsoft C++ exception: cinder::audio::AudioFileExc at memory location 0x0018C2D0.

rich.e

Re: save audio to file

2 years ago

Are you sure you have the correct samplerate and channel count specified? Your sample code has it reversed.

桂芳11

回复: save audio to file

2 years ago

sorry about the sample code mistake, I forgot to correct it. Here are the updated code I use:

1.declare some object:

audio::InputDeviceNodeRef mInputDeviceNode;
audio::MonitorSpectralNodeRef mMonitorSpectralNode;
vector<float> mMagSpectrum;

audio::InputNodeRef             mInputNode;
audio::TargetFileRef            mTargetFile;
audio::BufferRecorderNodeRef    mBufferRecoder;
audio::GainNodeRef              mGain;

2. in setup(), the code is like below:

auto ctx = audio::Context::master();
mGain = ctx->makeNode(new ci::audio::GainNode(0.9f));
mGain->connect(ctx->getOutput());
mBufferRecoder = ctx->makeNode(new ci::audio::BufferRecorderNode);
mInputDeviceNode = ctx->createInputDeviceNode();
auto monitorFormat = audio::MonitorSpectralNode::Format().fftSize(2048).windowSize(1024);
mMonitorSpectralNode = ctx->makeNode(new audio::MonitorSpectralNode(monitorFormat));
mInputDeviceNode >> mMonitorSpectralNode;
getWindow()->setTitle(mInputDeviceNode->getDevice()->getName());
mGain >> mMonitorSpectralNode;
mMonitorSpectralNode >> mBufferRecoder;
mBufferRecoder->enable();
mBufferRecoder->setNumSeconds(10);
// InputDeviceNode (and all InputNode subclasses) need to be enabled()'s to process audio. So does the Context:
mInputDeviceNode->enable();

ctx->enable();

3. in mouseDown() method, start to write to file:

mBufferRecoder->start();
std::string filePath = "record.wav";

mBufferRecoder->writeToFile(filePath );

rich.e

Re: save audio to file

2 years ago

Okay, so I tried your code and immediately I see the problem is that in mouseDown, you're writing the file directly after you start to record. So BufferRecorderNode has no samples recorded yet. However I didn't end up seeing the exception that you previously pasted, instead I saw an assertion failure when trying to write to the file with zero frames. I've made a modification in this pull request so that with your code, an empty record.wav file should be created, which you should be able to find in the vc2013 folder.

Now to get it to work, you could move the call to mBufferRecoder->writeToFile(filePath ) to mouseUp(), and then you should have saved whatever samples were recorded between mouse down and mouse up. Or, you can just start recording after you've `enabled()` the input device. Let us know if you run into more problems or this isn't clear.

cheers,

Rich

xumerio

Re: save audio to file

10 months ago

Sorry for using the old forum, but I came with this error just in the middle of a deadline.

I developed using the latest master branch dev9.2 and the stable 9.1 both on windows 10 and there was no problem.

But when deploying to a windows 7 machine the audio writing just broke and sends the evil message TargetFileMediaFoundation: Failed to create SinkWriter from URL.

I saw windows 7 is capable of of handling the media foundation, bute I cannot go further. Any hint would help.

rich.e

Re: save audio to file

10 months ago

Hey there,

I'm happy to try to help as writing .wav files is supported on windows. However please keep in mind that this forum is an archive and we're now using a much better one at: http://discourse.libcinder.org/

If you create a new post there with some details and / or test code of what you're doing (hopefully as minimal as feasible), I'll give it a look. I don't have a windows 7 machine, but there shouldn't be anything out of the ordinary there - we are using APIs that work back until vista.

cheers,

Rich

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