Error: "Invalid FLAC preamble" for streams in FLAC format

[bojanvidanovic]

Hi,
I'm getting an error Error: Invalid FLAC preamble when I try to get metadata from a stream in FLAC format.

Here is what I did:

const metadata = await musicMetadata.parseReadableStream(http://stream.radioparadise.com/global-flac, {
   mimeType: 'audio/flac',
});

It works fine with other formats except for FLAC, and I think you can probably reproduce it with the above configuration.
Tested with the latest Chrome and Firefox.

Let me know if you need any more details.
Thanks.

[bojanvidanovic]

I have updated the issue because I was not explicitly setting the mime type, instead I was relying on automatic detection which would set the OGG parser for FLAC and fail.
Now with the mime type and correct parser, the issue arises here.

[Borewit]

Interesting problem @bojanvidanovic.

The MIME type is application/ogg and actually suspect that is the correct MIME type. So the stream is no audio/flac.
So you should provide the original HTTP MIME type to music-metadata.

But I won't work.

What I suspect is that the stream is not formatted like a FLAC file, but it is an Ogg stream carrying FLAC.

And the Ogg/FLAC combination is not implemented.

I created branch which will throw a more specific error:

music-metadata/lib/ogg/OggParser.ts

Line 119 in 7258478

throw new Error('Crap, we don\'t have a page consumer for Ogg/FLAC yet.');

Which can be triggered with

music-metadata/test/test-http.ts

Lines 69 to 84 in 7258478

	it('Stream Ogg/FLAC from radioparadise.com', async () => {
	const url = 'http://stream.radioparadise.com/global-flac';
	const response = await clients[0].client.get(url);
	const fileInfo: IFileInfo = {
	mimeType: response.headers['content-type']
	};
	const tags = await parseStream(response.stream, fileInfo);
	if (response.stream.destroy) {
	response.stream.destroy(); // Node >= v8 only
	}
	assert.strictEqual(tags.format.container, 'Ogg/FLAC');
	});

Sorry, I do not have a lot time lately.