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| Unofficial VirtualDub Support Forums > Newbie Questions > Compress Audio |
| Posted by: tbh Aug 29 2002, 08:14 PM |
| I'm brand new to VD. Using my 3Com bigpicture webcam, I can capture the video, but at save time the audio portion is bigger than the compressed video portion. I want to reduce the filesize by compressing the audio but without losing too much quality. The only decent quality seems to be 16 bit. The help section says to compress with at least ADPCM but I don't know whether it should be compressed in the AVI creation step or if it should be in (IMA) ADPCM mode at capture time. Neither seems to work. If I try using ADPCM when I save the AVI -- it doesn't compress. If I have (IMA) ADPCM set at capture time, the entire system freezes at the end of capture and I have to reset. Where do I start? This is a 30 second video. Thanks. |
| Posted by: BaronVlad Aug 29 2002, 08:54 PM |
| You should capture nearly uncompressed (PCM audio @ 48 or 44,1 stereo and huffyuv video) AFTER the capture you can compress video and audio, please read here for more details: http://virtualdub.everwicked.com/index.php?act=ST&f=4&t=54&s=9d40148d6a6ea5b4cd8211ae7e3a536b http://virtualdub.everwicked.com/index.php?act=ST&f=6&t=35&s=9d40148d6a6ea5b4cd8211ae7e3a536b |
| Posted by: tbh Aug 30 2002, 03:20 AM |
| Baron Thanks for the reply. I don't understand the "codec menu set '2pass first pass'" line. Is that an option somewhere? In my listing of codecs (in compression), I don't see anything like that. Am I looking in the wrong place? I've looked everywhere, I think. I have version 1.4.10. |
| Posted by: tbh Aug 30 2002, 05:12 AM |
| I figured out that what I wasn't doing originally was to select one of the formats in the right window, otherwise there is no compression -- there is no default. It is compressing just fine now. |