similar to: ACM Format Tag for Speex Audio

My arrangement for a Speex format tag was actually accidental. I was asking what would be involved and instead of an answer, I got a format tag. Since there is only one functional Speex ACM codec available as far as I know, it should use the official format tag. I will be glad to modify our applications to conform to this de-facto standard. Others who may develop ACM codecs in the future

Keith, Try emailing mmreg@microsoft.com to register a wave format tag. If that doesn’t work please let me know and we'll find the direct contact there. Regards, Marc -----Original Message----- Wrom: YLEJGDGVCJVTLBXFGGMEPYOQKEDOTWFAOBUZXUWLSZLKBRNVWWCUFPEGAUTF Behalf Of Keith Looney Sent: Friday, May 16, 2003 10:58 AM To: speex-dev@xiph.org Subject: [speex-dev] Speex ACM Format Tag

Hi Ingo, >It is just a WAVEFORMATEX with a GUID in it. For the ACM system it is just a format with the id >WAVE_FORMAT_EXTENSIBLE and since ACM drivers are not registered by wFormatTag it should be working. >For testing purposes I've written a Vorbis ACM driver, that uses a WAVEFORMATEXTENSIBLE and I experienced >a problem when opening files with Media Player. It spend quite some

A friend of mine recently had a problem with a "broken" .WAV file (as you call them) because oggenc first printed out a warning and then didn't accept the file because of a "unexpected EOF error". Because I was interested in the issue, I decided to take a look at the oggenc source, and in fact, it is your .WAV reader that's wrong. More precisely: there are two version

I have arranged for an official Speex ACM format tag from Microsoft (see below). Feel free to use this in any ACM codec work. Keith Looney ________________________________________________ Keith Looney Senior Software Engineer On2 Technologies, Inc. The Duck Corporation <p><p>-----Original Message----- From: Bill Schiefelbein [mailto:billsch@windows.microsoft.com] Sent: Wednesday,

Yep, that's the bad news, you need an ID from Microsoft to make sure this ID is only used for FLAC. But since it's a 16 bits value, you can probably put anything randomly (only few are reserved). And I don't think it's illegal to use a number like that. Ingo Ralf Blum wrote: >>WAVEFORMATEX >>yes, that's the way to know what the codec does. >>But no

Prior to having your ACM codec, I was manually compressing Speex audio and writing it into one stream of an AVI file. To be able to use your codec for playback, I simply appended your WAVEFORMATEX extra data (the extra fields in SPEEXWAVEFORMAT) to the audio format. In looking at your code trying to determine how to fill in that data, it looked like the fmtnotice was optional. Is this truly the

Hi (again), I started to work on an ACM (Audio Compression Manager) for FLAC. I currently only have the canvas. The encoding/decoding is not done yet. So it's completely useless. But since the canvas is the harder thing to start, here it is. (just in case I don't have time to continue) http://mukoli.free.fr/flac-ACM.v0.1.0.zip

Christian, I have successfully integrated your ACM codec in our applications, but I have run into one minor issue. In a code comment you imply that fmtnotice is an optional part of the WAVEFORMATEX extra data. I tried to play a file that had no fmtnotice but Windows did not recognize it as valid and did not play the audio. Your work is very much appreciated here and we are anxiously awaiting

On Dec 14, 2014, at 10:02 AM, lvqcl <lvqcl.mail at gmail.com> wrote: > Currently the header of a decoded WAV file can be different to the > original WAV file because FLAC doesn't preserve 'fmt ' chunk. > > For example: create a 24-bit stereo .wav file with WAVEFORMATEXTENSIBLE > header with channel mask == 3. Encode it to .flac then decode back to .wav. > FLAC

Hi, Is there a defined format tag for Opus that should be used with the WAVEFORMATEX structure? See wFormatTag (http://msdn.microsoft.com/en-us/library/windows/desktop/dd390970.aspx). /John

Hello, On the Windows platform, I would like to compile a version of the codec files ogg.dll, vorbis.dll, and vorbisfile.dll that are small. I notice that the provided Windows projects are very large...the release Vorbis.dll is > 1 mb. To me, that is huge. I am only using decoding features. I looked in the Zinf project, and they seem to have a version with the encoding functions

If you want to use the Speex ACM codec in Netmeeting, you need to register the codec with Netmeeting. Microsoft offers an API to accomplish this task. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netmeet/nm3 codec_1xk3.asp The function is called AddACMFormat in the IInstallAudioCodecs COM interface. It takes a fully initialized WAVEFORMATEX structure as well as an extra

On Sun, 14 Dec 2014 01:14:16 -0800 Erik de Castro Lopo <mle+la at mega-nerd.com> wrote: > > -------------------------- > > Also, I have a question. > > > > Currently flac complains about 24-bit .wav files if they have > > old WAVEFORMATEX header and not 'proper' WAVEFORMATEXTENSIBLE > > header. However it writes such files itself. > > >

At the risk of throwing more fuel on the fire, I found the following document on the Microsoft website. It appears to be the file format counterpart to the API documentation presented by Chris Wolf. I'm not familiar with the WAVE format, so I'll let you guys interpret it (or tell me it is irrelevant): http://www.microsoft.com/HWDEV/audio/multichaud.htm [As an aside: Why does Microsoft

The commit http://git.xiph.org/?p=flac.git;a=commitdiff;h=99257e177eac96fa41a107b423080232f59ebe45 also requires some changes in write_iff_headers() function: currently flac don't write WAVEFORMATEXTENSIBLE header if decoder_session->channel_mask is equal to 0, 1 or 3. After the commit 99257e17 flac should do this for channel_mask equal to 0, 4 or 3. The patch fixes this.

Hi all, I and a few others are trying to implement Yahoo voice chat under Linux. Since Yahoo uses the TrueSpeech codec, we are trying to load the TrueSpeech DLL directly under Linux. mplayer can play TrueSpeech files already, and it appears that it contains portions of Wine code to do so. But mplayer cannot create TrueSpeech files as far as I know. We have ripped the relevant code out

> If I understand what you said correctly, there is such a call: > speex_bits_read_whole_bytes, which adds a couple byte to the SpeexBits > struct while removing the ones that have already been read. Oh, how could I not have seen that one? That is exactly what I need. Thanks for the pointer. >> It is unusual to require a different sequence of API calls >> depending on

The aplication that I am developing is like a sound recorder (goes directly to the soundboard and start capturing the sound and writing the file, using the directsound api). I'm already capable of writing to normal wav files but I wanted to encode the audio with speex to have smaller size (and still good quality). How can I write the wav files with speex content using the ACM codec? (like

But using the ACM codec I just need to put the speex content into the wave file data chunk and then windows will play it? Miguel Gomes -----Mensagem original----- De: owner-speex-dev@xiph.org em nome de Matthias Granberry Enviada: qui 04-03-2004 11:53 Para: speex-dev@xiph.org Cc: Assunto: Re: [speex-dev] Speex, what container?