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| VDMuser |
| Posted: Feb 25 2015, 08:40 PM |
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Member
Group: Members
Posts: 24
Member No.: 25402
Joined: 11-April 09
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Hello,
practically since I switched from w2k to W7 (64bit) I'm trying once in a while to get an old audio codec running. Actually, I got it working a long time ago but then I recognized that the results sound quite different from when I used it on w2k or now XP-Mode.
I'm talking about the "Lame MP3 ACM Codec Ver. 0.9o PreRelease Exp" by Mukai Tetsuji (Warlock).
Yes, I know it's old. Yes I know the current Lame ACM codec is much better. Well, almost.
The reason I still use that codec for some videos is, that this is the only lame acm codec (I have or know of) that can encode with 80kbps at 44.1 or 48kHz (in Stereo). The newer Lame ACM codec versions (I know of) don't do that. They only encode at 22kHz when 80kbps is selected (Stereo). For v3.99.5 e.g. the lowest you can go and still have Stereo is 128kbps for 48kHz or 118kbps for 44.1kHz.
When I have an video encoded with an crappy video codec or crappy settings for a good or ok video codec, why would I want to waste disk space on 128kbps when I can save some space using 80kbps with this old codec?
Today I thought I do some more testing but the only achievement I got was to being able to have both Lame ACM codecs - v0.90 and v3.99.5 - installed at the same time. But the result is still the same:
If I encode using Lame ACM 0.90 (with VD 1.10.4 32bit) on W7 the result sounds poor compared to the result I get if I encode the same file using the same codec and the same settings (80kbps) on XP-Mode (WinXP-VM on W7).
A frequency analysis shows me that (at a chosen time) in the file created on W7 the frequency drops at about 9kHz while in the file created on "XP" the frequency drops at just under 12kHz.
And I have no idea how that can be. Checking the files using MediaInfo they're exactely the same, so there seems to be no mixup with another codec on W7, because e.g. the metadata for v3.99.5 is definitively different.
The thing is: There's an in-your-face difference you can hear between those two files immediately - both being 80kbps. But there's no immediately noticable difference between the "good" 80kbps file and the file encoded with v3.99.5 at 128kbps. The frequency analysis reveals that the frequency drop in the latter file is at about 15kHz. So there is a difference - as expected. But it seems the frequencies between 9 and 12kHz are more important that the one between 12 and 15kHz.
So my question is: Is there any reason why W7 (64bit) would handle the same codec at the same setting differently that w2k or WinXP?
I would expect a codec or driver maybe not to work at all if it was old, outdated or whatever. But working "just fine" without any indication of failure and then putting out "cutoff" audio doesn't really make any sense to me.
Thanks for any helpful hints for why W7 behaves that strangely.
Btw. that's basically the only reason why I need XP-Mode at all! And that's why I'd like to solve that mystery so that I can get rid of the XP-Mode and free up a lot of disc space. |
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| dloneranger |
| Posted: Feb 25 2015, 09:07 PM |
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Moderator
Group: Moderators
Posts: 2366
Member No.: 22158
Joined: 26-September 07
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Cant see any reasonable reason why that would be - assuming that you're using the 32bit version on both
(you've checked the config options are the same on both?)
Are you sure that the difference isn't in the decoding before it even gets to Lame??
Save both as pcm wav and compare them?
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MultiAdjust JoinWav WavNormalize FFMPeg Input Plugin v1827 UnSharpMask
Windows7/8 Codec Chooser
All FccHandlers Stuff inc. Installers for acm codecs AAC, AC3, LameMp3 |
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| ale5000 |
| Posted: Feb 25 2015, 11:52 PM |
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Advanced Member
Group: Members
Posts: 1114
Member No.: 22180
Joined: 30-September 07
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To have a small file you can use also "44100Hz, 120 kbps ABR, Stereo" or "320000 Hz, 88 kbps ABR, Stereo" on Lame 3.99.5.
Have you tried?
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New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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| VDMuser |
| Posted: Feb 26 2015, 09:38 AM |
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Member
Group: Members
Posts: 24
Member No.: 25402
Joined: 11-April 09
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| QUOTE (dloneranger @ Feb 25 2015, 10:07 PM) | Cant see any reasonable reason why that would be - assuming that you're using the 32bit version on both
(you've checked the config options are the same on both?)
Are you sure that the difference isn't in the decoding before it even gets to Lame??
Save both as pcm wav and compare them? |
Well, apart from having to install the codecs on each system seperately, they're running the same VD copy as the VM runs it from the folder on the W7 host, so all plugins etc. are identical, because there is only one copy of VD on my PC for the host and the guest machine.
And as I generally use config scripts, the setting should also be exactely the same.
And regarding "before it even gets to Lame". I'm not sure what to make of this. It's the same source, same VD copy, same settings, why should there by any difference?
Also, if it was "before Lame", why would that problem not also affect v3.99.5? |
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| ale5000 |
| Posted: Feb 26 2015, 12:20 PM |
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Advanced Member
Group: Members
Posts: 1114
Member No.: 22180
Joined: 30-September 07
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Every OS is different and every version can have bugs and/or compatibility issues that can be different in every OS that can be fixed in a new version.
I don't know in details the cause of your problem but it is worth trying the latest version.
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New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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| Abrazo |
| Posted: Feb 26 2015, 04:30 PM |
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Advanced Member
Group: Members
Posts: 775
Member No.: 28995
Joined: 5-November 10
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I do not know if it may help, but in the Audio-menu > Conversion..., the "Sampling rate", "Precision", "Channels", are all set to "No change" by default.
But what does that parameter "High quality" ?
To learn more about it, just click the "?" (the question mark) in the "Audio conversion"-dialogbox and then click onto "High quality".
Whenever I have to resample and encode audio in VirtualDub, I check this parameter.
If it is not, the sound is often bad. Especially at "sss's" in spoken words, you can here the difference.
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