Audio sounds slurred when converting DV?

I have captured 6 1 hr DV tapes using Windows Movie Maker. The AVIs playback flawlessly using zoom player, WinDVD, etc. I then encoded them all with TMGPenc.

Yesterday I authored my first DVD using DVD Author 2 and it worked perfectly and played back fine on our DVD player.

Today I loaded my second m2v/wav files and went to cut-edit and chaptering and when I preview it the audio sounds slurred as if its running way too slow, sort of like a record player if you turned the turntable with your finger.

I have no idea what could be causing this problem so I thought I would post and ask if this has come up before. I havent made any changes to my system since the first successful authoring so this is quite odd.

Thanks in advance

Just an added note- I have now played back the WAV files by themselves and I get the same slurred/exorcist sounding playback.

Added note 2- attempted encoding with Procoder demo...same audio problem. The AVIs play just fine.

I don't use TMPGEnc to encode audio, but I doubt that's your problem. If you are sure WMM isn't introducing any problems, then it sounds like the PCM from your DV is corrupted. That seems unlikely. I'm assuming you used a FireWire interface to transfer the DV to the computer? I use WinDV software for DV transfers.

I also assume you are using WMM for editing? WMM doesn't seem to always output a spec DV file. I edit in VirtualDub Mod. Then I save out the PCM DV audio as a WAV after editing the file. The WAV audio I encode to AC3 with ffmpeggui and use that audio in TMPGEnc DVD Author.

If your audio from your DV tape has no problems, you may have to trace down where the error occurred. The FireWire transferred file should be an exact copy of the file on the DV tape.

Have you burned one of these 'corrupted' files to DVD? It may be what you are hearing on the computer is not the condition of the outputted file. Previewing it may not be giving you a true picture of quality.

And welcome to our forums.

thanks for the reply redwudz. I did transfer using a firewire port and the AVI files captured with WMM playback perfectly, but I am not sure WMM isnt causing the issue. I have tried encoding with tmpgenc and procoder and both do the same so I am going to post this in the encoding forum as it defintely doesnt appear to be a DVD author issue. I havent used WMM for editing yet, was just using DVD author for small clips here and there.

I havent tried burning the files to DVD with the corrupted audio, I will try that..interesting thought.

I may try WinDV for capture and also the methods for encoding the audio you use so thanks for the tips there also!

Jim

I will move this thread to the DV forum and change the title. See your other thread. If you want to move a topic in the future, ask a Mod.

Thanks again! For grins I tried opening the AVIs I had captured with WMM in virtualdub mod. I got 2 errors:

1. couldnt locate suitable decompressor for dvsd
2. AVI- Type-1 DV file detected. virtualdub cannot extract audio from this type of file.

Im pretty sure #1 just means I need a codec installed for dvsd. Does #2 mean my captures are no good from WMM? Should they be Type-1 and should virtualdub mod be able to open them?

thanks for the reply. I downloaded dvsd (again as it turns out, I had installed it 3 days ago when I started the project, and did a system restore in xp when I first started having issues and I think I lost the codec then.

Anyhow, I tried again capturing with WMM, encode with tmpgenc, and input to DVD author, same wierd audio problem.

I then captured with WinDV, encode with tmpgenc, and input to DVD author and all is well. I did notice that the default in WinDV is a Type-2 AVI, whereas apparently WMM makes it a Type-1.

So, not sure why but my captures with WMM give me funky audio. The wierd thing is, my very first capture was using WMM and the same methods above and it was fine. But now it no longer works

I will play with WinDV for now and try a complete capture/encode/burn process.

I then captured with WinDV, encode with tmpgenc, and input to DVD author and all is well.

I have no idea what the problem is with WMM either. But WinDV is a simple solution if it works for you. VD is a good editor for DV if you need to edit. You can also frameserve from VD or VDM to TMPGEnc encoder directly and save time and disk space.

Ok part 3 of my adventure. I am still having audio issues. I have one tape that I brought in using WMM again, because WinDV is not working for me either.

The AVI file that results is perfect, audio plays fine entire tape.

Encoded using tmpgenc, and at the 19:30 mark in the resulting WAV file, the audio slows down and sounds like its playing in slow motion for the duration of the WAV.

Viewing the AVI, the 19:30 is a cut point between one scene and another. (taped at different times)

I then tried extracting the WAV from the AVI using virtualdub 1.6. For the first 19:29 of the resulting WAV, the audio has a loud buzzing sound with the actual audio playing very muffled in the background, and at the 19:30 mark, it starts to play perfectly for the rest of the WAV!!??

What the heck is going on? The AVI is 100% perfect, but encoded or extracted audio has issues.

What do you get if you use TMPGEnc to just demux the WAV file out of the original AVI? If that's okay then you could encode just the video with TMPGEnc and author with the demuxed WAV file (assuming you wanted LPCM audio on the final result).