Description:
Microsoft 32-bit development newsgroup.
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WIA support under Vista and Windows 7
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I'm not sure whether this is the correct place to ask the question, but can anybody clarify which of these statements in MSDN is correct: "WIA does not support cameras in Windows Vista or later. For those versions of Windows, use the Windows Portable Device (WPD) API": [link]... more »
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WM ASF Writer
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My software product uses the "WM ASF Writer" Filter (CLSID_WMAsfWriter) in order to write WMV Video files. One the machine of one of my customers, the Filter cannot be instantiated. hr = CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void **) ppFilter);... more »
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Vfw AVI functions and system cache
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I am using Video For Windows to write captured images to an AVI file. I am using AVIFileOpen to create the file. I noticed that when AVIFileOpen creates the file it disables system cache. AVIFileOpen appears to use the FILE_FLAG_NO_BUFFERING flag to create the .avi file. This is causing a storage performance issue on my machine. Is there a way to disable the use of... more »
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Extract Audio (PCM) data from IDirectSoundBuffer::Unlock
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Hello, I have an Application which extract PCM data from two buffers of IDirectSoundBuffer::Unlock method. I dumped this audio data and add WAVE Header, and when I play it, a lot of noises and glitches can be heard. Currently I am dumping audio data in following sequence. 1. from first buffer of UnLock method.... more »
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how to control bass/treble with mcisendstring
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i used this code [code] mcisendstring ("setaudio mediastream output bass to 100) mcisendstring ("setaudio mediastream bass to 100) [/code] and got error the device doesn't support this command my question is what devices support bass/treble command ? and what the syntex exactly ? thanks in advanced.... more »
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waveInOpen callback_window -- usefullness ?
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Hello All, I've just been tinkering around with retrieving microphone sound-data using the "waveInOpen" command while specifying the CALLBACK_WINDOW argument, and was wondering about its usefullness ... I notice that none of the three WIM_??? messages supplies any user-defined value (like a pointer to some special storage-area), such as the... more »
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waveOut vs. Core Audio API
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If we use waveOut API, we can have audio buffers of different size. We can also be notified through an event when each of these buffers is being rendered by the driver. I'm trying to do the same thing with the new core audio API, but I don't see some easy solution. We can call IAudioClient::Initialize() and provide the... more »
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AVIStreamRead return data wrong
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Hello, I am using AVIStreamRead to read AVI video, AVIStreamRead(gapavi[0], i, 1, frame, bsize, &nBytes, &nSamples) but the data returned in frame is shifted 3 DWORDs. for example the data returned in frame is: 00 00 00 00 30 30 64 63 00 60 09 00 86 79 87 80 ... where 86 is the first pixel of the video. and I think 30 30 64 63 (00dc)... more »
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