High Pitched "Pops" with VirtualDubMod?

[EwanG]

Working my way through my MPEG2-AVI process, and decided to try VirtualDubMod. I had tried the most recent version of VirtualDub-MPEG2, but it didn't keep the sound and video in sync.

VDM seems to be able to keep things in sync, but during playback of the created file I hear these high-pitched pops or... well, it's a little hard to describe but it sounds like the higher frequencies of the captured audio are getting cut off and slurred or popping.

It's only a minor nuiscance, but I suspect over time I would develop an intolerance to it. So am hoping someone else out there has had the same problem and can tell me what to do.

Thanks,
Ewan

[EwanG]

Does 0 replies mean I'm the only one having this problem, or that it's a common problem and no one knows the answer?

Enquiring minds and all that

[Tommyknocker]

Why not run the audio through Gold Wave and select Pop/Click? Save it and load the new audio.

[Gritz]

Well .... this may not be your solution but it was mine. I noticed that a current customer video and slide show DVD was producing a clicking/popping sound that I could not get rid of. I spent days substituting, upgrading, searching for a solution and even pulled my burner and installed in another system. Still no success. I was running video and stills through Adobe Premiere and adding appropriate MP3 music and exporting the timeline to a movie and then using MyDVD 4.0 as the author. Finally in desperation I converted the MP3s to AIFF format and my problem was solved. Must be something to do with the final conversion process. It was a weird problem .... but it definitely solved the problem in my case. If you're using MP3 music you might try another compatible format to see if the problem goes away ... just a thought.

[EwanG]

Why not run the audio through Gold Wave and select Pop/Click? Save it and load the new audio.

Have a similar sound processing tool, but am not clear how I would get VirtualDubMod to create an AVI and a seperate sound (preferably WAV I assume) file that I could then join after processing. When I look in the "Streams" window it just shows the MPEG2 Video and Audio in the same stream.

FWIW,
Ewan

[EwanG]

Well, have done some more work, and have managed to come up with a workflow that is reasonably consistent. If you have to deal with Hauppauge generated MPEG-2 files, this may be of some use.

Capture occurs using a Hauppauge WinTV PVR USB connected to a USB-2 port. This allows the Hauppauge to generate a Full D1 at a 4000k data rate. File is saved as an MPEG-2 through the WinTV2000 application that performs the capture.

MPEG-2 file is then given as input to the Vidomi 0.469 version encoder that has been patched with the vidomi_update_patch20030628 file. Vidomi is configured to not do the deinterlace function, and to use the MS MPEG-4 V2 codec at 90 quality and 4200 bit rate. I had been trying to match the 4k bit rate of the capture, but evidently it's somewhat variable and that and the deinterlace seemed to be what was causing my sound problems. I use Vidomi's "Select Output Range" to edit out my transitions.

Then feed the resulting AVI to VirtualDubMod (though regular VD should also work) and run the Deinterlace Filter and Smoother filter with the noise pre-filter to produce my final product. Again use the MS MPEG4 V2 codec at Quality 90 and 4200 bit rate.

Because both Vidomi and VD/VDM have job queues, I'm able to do a batch of conversions in the evening without user intervention. As both products are also free, I don't have to worry about future machine upgrades (outside of affording the machine).

FWIW,
Ewan