Digital TV -> DVD. Audio synch, will it ever be correct ?

[dd]

Hi everyone,

Why dont we see hard disk recorders that record the broadcast digits AND offer direct archive to DVD ?

Because such kit doesn't seem to exist I thought I'd have a go myself.

I have a Hauppauge DEC2000 and want to capture TV programmes, edit the ads out and burn to DVD, hopefully without any quality loss due to re-rendering.

I get the impression from this and other forums that Digital TV broadcasts will always drop frames and that this will inevitably cause audio synch problems.

Am I wasting my time or will a DEC2000 + VideoReDo + DVDLab really allow me to make DVD's with perfect lip sync ? Will I need to "play" with audio timing for each recording I make or is there a fixed recipe that will deliver synchronised A/V every time ?

thanks for any thoughts

[DanR]

For most of our users, VideoReDo will correct the sync problems. Our goal is, if it plays in sync then VideoReDo will let authoring program create in sync DVDs. If this doesn't happen we consider it to be a problem and will work towards fixing it.

That being said, there are issues with DVD authoring packages that may be outside of VideoReDo's control. Again we will try to accomodate those packages when we can figure what's going on.

I'm a personal user of DVDLab myself and have NO sync issues as long as the files are processed first by VideoReDo.

[Carl Rawson]

Hi dd! Couldn't let this one pass. I too have had exactly the same idea as you. Basic system K2S5A mother; 120GB WD;200GB Maxtor; Athlon XP 1700+ and 500MB PC 2100 along with mediocre sound and video cards...so no great shakes there then.
I use the Hauppage Nova-t pci (909) for t.v. capture. Videoredo for edit (and now thanks to this and other forums bitrate conversion) and Roxio EMC7 for DVD authoring.
My first DVD was a bit of a flyer and the sync. was all over the shop. Didn't use VRD did I?
Ever sonce then I ave had not not 'jot' of a problem.
I wouldn't be without VRD to get rid of those nasty adverts etc.
Don't know really what to suggest except that I make a habit of closing Virus and Firewall software for all video work and keep the hard drives well defragged.
Stick at it! I'm getting some great results now but it's been at least a 2 month learning curve.
p.s. Dan did you receive those DVD's?

[DanR]

Hi Carl,

Yep, got them all, but I've been tied up with some other stuff. Will get to them this weekend.

Thanks.

[Paul Evans]

I woulkd echo Carls comments, but I am sympathetic with your exerience to date. I use a DEC2000-t to record UK DTTV to hard disc then edit ot commercials using VideoRedo.. mostly without a Quickfix. I author using Ulead MF2.

My earliy experience was similar to yours and indeed I used to adjust A/V sync to correct for DVD burn.

Now using VideoRedo ver 276 and latest Ulead burn-engine drivers output seems good. I also ensure that the source and destination files (I author to an iso file) are on seperate disc drives, thus ensuring minimal disc overhead during mux operation.

I have no experience of DVDLab but it does seem that the authoring package is invariably to blame.. I have tried Adobe Encore 1.5 this maintains A/V sync but is fussy on mpg source and sometimes insists on recoding (to be avoided) if source format is 704x576

[dd]

Thanks for the replies.

So with a bit of luck VRD will be the answer to my problems.

I have not yet used VRD but will now give it try.

Does VRD weave it's audio sync magic by default, ie as a result of loading the originals and then saving the edited version or will I have to "do" something to ensure sync is maintained. I am hoping that whatever is required it will be a fixed procedure that will be applicable to any TV recording. I don't want to have to monitor each recording and apply some variable correction to fix sync problems.

[DanR]

Does VRD weave it's audio sync magic by default,Yes. Sync correction is on by default, but can be disabled.

[marko]

Yes. Sync correction is on by default, but can be disabled.

Dan, I have recently aquired a Targa dvd player which plays my raw dec2000 recordings on an ISO formatted DVD without errors and would like to be able to cut without sync correction(or other correction)

Is this the VideoRedo Options>Stream Parameters>detect/resync option?? or are there other bits I need to turn off/on.

Ive always been a bit timid about changing any settings for VRD.
Is there a quick way to reset to default settings for VRD should I want to make a DVD ??

Thanks