12 bit audio won't capture?

nolonemo wrote on 1/1/2003, 10:40 PM
I'm having trouble capturing video from a Sony TRV-18. I've captured with no problems in the past, but am having difficulty with a new project.

The old projects were straight MiniDV with 16 bit 48Hz stereo audio. The new project is different: The tape was shot in 12 bit audio mode, with a dummy 1/8" stereo jack plugged into the mic input to kill the audio. (The Sony has 2 audio modes: 16 bit and 12-bit. 16-bit is a straight 16-bit stereo audio track. In 12-bit mode, what happens in essence is that while taping, 12-bit stereo audio is recorded onto one channel of two audio channels, leaving the second channel free for dubbing during playback later on.) I then dubbed a commentary track onto the second channel during playback. I know the sound is on the tape because I can hear the commentary when I play the tape back from the camera through the TV.

When I try to capture to VV, however, all I get is a whining sound, and the captured audio tracks look flat on the timeline. During capture I can hear the sound play back in the camera, but don't hear the sound through the computer speakers, only the whining sound. Is this just a limitation of VV (I see that in project properties you can only select 8, 16, or 24 bit audio)? If I look at the properties of the captured audio, it's identified as 32000 Hz 16 bit stereo.

I know I can always capture the audio separately via camera AV out into my soundcard, but would prefer to capture via firewire with the video so I'm assured of good sync.

Any suggestions or comments appreciated.

Thanks to you all.

Comments

Chienworks wrote on 1/1/2003, 10:56 PM
This doesn't help you any ... but VidCap currently does not capture the secondary audio channels.
Well, maybe this will at least help you stop pulling your hair out now that you know it's not you doing anything wrong.
jetdv wrote on 1/2/2003, 7:51 AM
Try Scenalyzer live. It will capture video plus audio 1/2 into an AVI file while simultaneously capturing audio 3/4 into a separate WAV file.
nolonemo wrote on 1/2/2003, 10:43 AM
Thanks Chien, figured it would be something like that. And I thought I was being so clever!

JetDV, do you know if the free version of scenalyzer will do what you describe?

Thanks.
jetdv wrote on 1/2/2003, 6:24 PM
You have to use "Scenalyzer Live". You can run it for free but it will place an overlay periodically on a video frame. I don't know if it will affect the audio in any way. However, the price is only $33 so it won't break the bank. Well worth it if you need audio 3/4. I would recommend downloading it and testing it to see if it will meet your needs before purchasing it.
nolonemo wrote on 1/3/2003, 12:23 PM
Thanks, looks like scenalyzer will do the trick. It has the option to capture the second channel only, which is perfect.
Zulqar-Cheema wrote on 1/3/2003, 1:16 PM
I had this out with SF sometime ago with my sony VX9000 on dual audio mode.
If the audio is not stereo (L,R)but CH A & CH B, then the vidcap only records one channel, can not remember which one, I would guess in this case the audio that is blank from your machine is coming in as mono and as that track is silent no waveform.
try a search on VX9000 on this site to find previous posting.
I beleve it is due for alteration in VV4