Virtual Dub

swiftyfred

2 Sep 2005, 11:27 AM

Hello.
I wasn't exactly sure where to post this being a newbee, anyway, I have been using Nicky Page's Guide to fixing quiet sound (bad audio) on AVI'S with DeDynamic and they are o.k. except for one small problem. After multiplexing the final AVI file with Virtual Dub the movie picture quality is reduced and the AVI file is approximately 100 meg smaller than the original. Could it be a setting in Virtual Dub that is not correctly set? I'm not that familiar with the program. Surely the file should be close to the size of the original AVI.:confuzed:

tigerman8u

2 Sep 2005, 11:45 AM

are you encoding the video/audio at a lower bitrate than the original

anonymez

2 Sep 2005, 11:51 AM

do it again, but make sure you select "direct stream copy" under "video" in virtualdub. that will ensure the video won't be touched.

there is no need to re-compress the video, as all you are looking to change is the audio :)

swiftyfred

2 Sep 2005, 12:03 PM

Audio settings:
The original - 117mbs, 127kb's per second, 44100Hz, mp3

New file - 58mb, 64Kbps, 44100Hz divx;-)Audio

I think I used direct stream copy, but i'll try it again to make sure.

swiftyfred

2 Sep 2005, 01:01 PM

Sorry Guys.

It appears I've made a mistake. The difference between the files was only the amount between the two audio streams, I thought there was some video quality missing. I was using Winamp for the first time with video and the picture didn't appear as good as Windows Media Player.

anonymez

2 Sep 2005, 01:05 PM

that was the first thought that came to mind, but you said 100mb difference in your original post, whereas your previous post showed only ~60mb difference, which made me think you had compressed the video :)

tigerman8u

2 Sep 2005, 01:19 PM

the 100mg is what made me think he was re-encoding the video.all's well that ends well :)

swiftyfred

2 Sep 2005, 10:01 PM

Yes. I should have checked my facts before jumping to conclusions. It wasn't 100 meg.

Anyway, I wanted to convert to MPEG, Layer-3, 44.100hz but the frequencies in my Select Audio Compression (Dialogue) after selecting MPEG Layer-3 did not go up that far. I ticked the show all formats box but it wasn't there. Am I missing a codec or something?

tigerman8u

3 Sep 2005, 05:44 AM

get the excellent free audio encoder Lame MP3

swiftyfred

3 Sep 2005, 08:09 PM

Thankyou Tigerman.
I've installed Lame mp3 and it's working fine now.:thanks2:

swiftyfred

4 Sep 2005, 06:51 PM

I have installed lame mp3 but there is an mp3 encoder for TEMPEnc which i'm thinking of downloading. Are there likely to be any problems with having both codecs on my system?

anonymez

4 Sep 2005, 09:05 PM

tigerman8u

6 Sep 2005, 08:51 AM

no, there shouldn't be any problems. however, i don't see why you would want another mp3 codec. LAME is quite easily the best there is :)

codec conflicts are usually caused by installing 'codec packs' found on the web. you are well advised to stay away from them :)

agree. IMO never install a codec pack, to many problems/conflicts. Install a codec only when/if it's needed.
Lame MP3 is used with programs such Virtualdub
tooLame.exe is used with programs such as Tmpgenc Plus

swiftyfred

8 Sep 2005, 08:12 AM

Thanks, I have avoided downloading codec packs. I'll try the Tmpgenc codec.

I've just converted some VOB files to AVI files in Magic DVD Ripper and the VOB files were (mpeg2, 48000hz, 384KBps, AC3 DVM).

Now they are (DivX v3 :-) MPEG-4 (low motion)
192KBps, 44100hz, Lame mp3 in the AVI container).

My question is, there are no audio settings to alter in Magic DVD Ripper, as far as I can tell. So where did the 44100hz Lame mp3 come from and can it be altered?