similar to: Re: FLAC format

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

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

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

Mr. Blum, I had to make some assumptions writing the driver, because I had no previous experience writing ACM drivers. I did what I could based in Microsoft's documentation but, of course, I made same mistakes. I had no time to test the code I wrote yet and will not in the next 2 weeks. All I can tell you now is about what I did and about my sources. So, considering your enthusiasm, I suggest

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.

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

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. > > >

HI Josh, I'm starting now to compile the ACM codec. I don't know how long it will take, since I do it in my free time, but I guess it will not take to long. About Mark Powell's comment, with an ACM codec there will be a lot of Windows GUIs for FLAC. I'm writing this message to talk about the FLAC format. The GUIs for the Audio Codec Manager, including Winamp and Windows Media

lvqcl wrote: ... > From FLAC 1.2.1 documentation: > > 0000-0111 : (number of independent channels)-1. Where defined, the channel > order follows SMPTE/ITU-R recommendations. The assignments are as follows: > 1 channel: mono > 2 channels: left, right > 3 channels: left, right, center > 4 channels: left, right, back left, back right > 5 channels: left, right, center,

I apologize for the terribly long message, but here goes. ------------------------------------------------------------------------------------------------- First, regarding existing tools that I now about. libavcodec and users (e.g. HandBrake): - if there are 6 channels or less, the layout is set by the decoder as per the FLAC specification - if there are more than 6 channels, the layout is

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

Hi All, Are multi-channel (more than 2) formats fully supported in the OggVorbis specification ? I couldn't find any information about multi-channel support on xiph.org. I've used 'oggdropXPd' to encode a 5.1 wavefile and the Xiph OggVorbis libraries (vorbisfile.dll) to decode the file successfully, however the order of the channel interleaving is different to the original wave

I know I've read about it under the FAQ and other various forums a dozen times, FLAC is able to encode up to 8 channels. But has anyone actually tried to do this? I ran across this nifty 7.1 wav sample courtesy of Microsoft. http://www.microsoft.com/windows/windowsmedia/howto/articles/Multichannel.aspx#link6 For some reason the channel mask was incorrectly set to 0x3f, so I manually changed

Hello everyone, I was just browsing through some video capturing websites/forums and saw some people complain that there was no lossless codec available to encode audio in AVI files. I thought that FLAC would have one but it doesn't seem to be the case. As it's a popular demand (now that hard drives are inexpensive, people can record hours of video/audio without any loss and then

I''m been busily converting the xenpci and xenvbd drivers from WDF to WDM to resolve a few issues including potential licensing problems with the Microsoft WDF and to (hopefully) allow them to function as boot drivers when doing install and system recovery. It was a fairly major rewrite of xenpci, and xenvbd, which are now working (booting and running without crashes so far). I

I''m been busily converting the xenpci and xenvbd drivers from WDF to WDM to resolve a few issues including potential licensing problems with the Microsoft WDF and to (hopefully) allow them to function as boot drivers when doing install and system recovery. It was a fairly major rewrite of xenpci, and xenvbd, which are now working (booting and running without crashes so far). I

Hi, As a potential user of the Speex ACMs and DirectShow filters to come I am also curious about how many ACM codecs for Speex there are under development right now. Also, the WAVEFORMATEX structure must be planned so that it is extensible, with backward-compatibility, without having to ring back Microsoft for further WAVE_FORMAT tags. For instance, it is a good idea to put a flexible sub-format

lvqcl wrote: > Martin Leese wrote: >> Note that the channel order may not be defined. > > IMHO it doesn't matter in this place of documentation (which describes > default channel assignments for FLAC). Your proposed wording was: 0000-0111 : (number of independent channels)-1. The channel order follows SMPTE/ITU-R recommendations. The assignments are as follows: The

does there exist anywhere a useful source version of an ACM for vorbis audio? I've seen the binary one somewhere in Japan, and there's an abandoned project at SourceForge, but I'm having a helluva time building it. I know all the caveats about CBR vs. VBR, ACM/AVI problems etc. but I need it anyway. Thanks in advance - ___ Dan Miller (++,) Founder, CTO, On2.com --- >8 ----

Hello, what is the right way to disable XFree86 and wdm listening ports tcp 6000 and tcp 1024. I read in man XFree86 about the -nolisten tcp option and tried to set in /usr/X11R6/lib/X11/xdm :0 local /usr/X11R6/bin/X -nolisten tcp but it was not successful. What is the right way to close the ports without use of IPFW? Your help would be appreciated. Thank?s Wolfgang