Audio losing sync during capture to AVI

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Here is my setup: PIII 700MHz, 256MB RAM, empty NTFS 30GB 7200RPM IDE harddrive with UDMA enabled, WinTV-FM, SoundBlaster Live! Platinum 5.1, Windows 2000 Server, MGI VideoWave III SE.

Why does the audio lose sync at random times while capturing AVI? This is definitely not related to dropped frames (unless frames are being dropped without being registered) and it is unpredictable. Last night, it took over six attempts before a capture synched (that was over two wasted hours for 30 minutes of video). Doesn't make any sense since each attempt was identical. VHS tape to WinTV A/V inputs to MGI VideoWave III. Tried VirtualDub and it lost synch immediately. What could be causing this (such as an external service or program)?

The settings that I am using are AVI video (640x480, YUV9, Intel Indeo Video Raw 1.2 codec, 29.97 frames, Synchronize to Audio) and Audio (22KHz, 16bit, Stereo, most likely PCM encoding). Sometimes it works, sometimes it doesn't, so this is not a problem with slow hardware.

Befuddled,

-- Robert Templeton (templer@vplayground.com), March 14, 2001

Answers

make sure that you have turned your video aceleration off or if you allready have you might want to use Camtasia Producer and recorder. if the audio still goes out of sync you can use the producer to cut frames here and add frames there. i use camtasia and the results are always pretty good

-- alberto gonzalez (gonzbert@yahoo.com), March 21, 2001.

------------------------------------------------------ make sure that you have turned your video aceleration off or if you allready have you might want to use Camtasia Producer and recorder. if the audio still goes out of sync you can use the producer to cut frames here and add frames there. i use camtasia and the results are always pretty good ------------------------------------------------------

Alberto,

What do you mean by "video acceleration"? Where is this to be turned on or off?

-- Robert Templeton (templer@vplayground.com), March 21, 2001.


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