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View Full Version : VHS to DVD encoding audio/video sync issues ?



eva2000
12-21-2003, 11:49 AM
I use the following to watch and convert my VHS recorded shows to mpeg-2 dvd codec on my PC

Setup

room 1
NEC 51cm stereo tv
-> Samsung mono VCR
-> GigaAir2040 wireless transmitter

room 2
PC
-> Leadtek Winfast 2000XP Deluxe tv tuner/capture -> RCA video cable and RCA audio cable -> GigaAir2040 wireless receiver

Process
So when i play or record any VHS video on my VCR in room1 i can get it wirelessly transmitted to my PC running Leadtek tv tuner/capture card which is scheduled same time to record as my VCR.

I setup Leadtek to record to MPEG-2 codec with PAL 25FPS, and have no problems watching daily recorded shows and all... no sync issues at all. But when i start messing or encoding or splitting the mpeg2 into sizes or formats for svcd, vcd, dvd-r media the audio is ALWAYS running faster than the video = out of sync.

I read to fix this you need to increase the frame rate of video being recorded ?

My current project is to convert three 6hr VHS tapes to dvd-r. Each mpeg2 capture from VHS initially is around 11.3GB in size for 6hrs.

But the ending 1-2hrs is always audio playing faster than video frames and being out of sync if i start cutting the 11.3GB files into dvd-r sized segments using apps such as Tmpgenc Plus, VirtubMod, mpeg2vcr :( But if i leave original 11.3GB file the ending and thorough is fine with no sync issues

I forget about the leadtek capture setting for DVD PAL mpeg2 which i guess will automatically record into dvd-r sized segments right ???

eva2000
12-21-2003, 12:12 PM
some advice i am quoting regarding VHS to DVD and sync issues



But, if you're doing home video editing and recording from VHS thru the TV capture card onto the PC then be aware that all TV capture cards can 'drift' the audio after awhile - ie: the audio and video loses sync. This is because all TV capture cards require you to plug your audio input into your sound card's line in, not into the TV capture card.. so as the video and audio are going thru different cards (video on the TV capture card, audio on the sound card) they can lose sync. This is especially prevalent if you're encoding direct to MPEG1 / MPEG2 / VCD / SVCD.


The ways around this are either:

a) buy a digital video camera with analogue inputs and then plug the VCR into the digital camera and then record the video direct to the PC using firewire (cheap miniDV with analogue $700 + $50 for a PC firewire card)

b) buy a Pinnacle MP-20 analogue capture / MPEG encoding card - this does REAL-TIME MPEG1 and MPEG 2 video capture and has locked audio capture as well (rrp $650) (but no firewire input)

c) buy a Canopus ADVC1394 analogue/digital capture card - has analogue as well as firewire.. audio is captured by the card, so the audio will never lose sync (rrp $599)

options (a) and (c) must software encode the miniDV .AVI to MPEG2 for burning to DVD and that can take a couple of hours


any comments from the pros or users of any of the other options ?

pointreyes
12-21-2003, 05:56 PM
Originally posted by eva2000
any comments from the pros or users of any of the other options ?

I would like to know as well. I have an analog camcorder and I'm starting to wonder if I will have to record from the VCR to the camcorder and then the camcorder to the capture card. Not really my preferred way to convert my VHS to DVD.

Duvie
12-21-2003, 11:12 PM
INstead of increasing the frame rate I think all you need to do is set the 3:2 pulldown during playback like the option in TMPGenc....

On the other hand you are running pal settings so I don't know if that plays the same...