So I've been recording some HD movies on Cinemax and HBO and, for some reason, they're broadcast with 2.0 tracks instead of 5.1. I'd like to sync up the 5.1 ac3 (or DTS) track from the DVD with the HD video. What's the easiest way to go about making sure my sync is 100% accurate? Unfortunately, there's no audio program (that I know of) that will allow me to match up multiple audio tracks like that and export without re-encoding.
Thoughts?
You want to do what I am doing now LOL, you will absolutely NEED Sony Vegas, it is the shit when doing this kind of audio work, I am sync'ing the LD DD 5.1 tracks to the broadcast DD 2.0 tracks for the '97 SE's, it is very tricky work at first but once you get the hang of it, it is pretty fun.
Adywan gave very good tips on how to do this in 1 of my threads, I will see if I can find it and make a link to it.
OK I found the thread, this is the thread and it starts on page 3 about Vegas.
http://originaltrilogy.com/forum/topic.cfm/97-SW-SE-Trilogy-Take-2/topic/10964/page/3/
Womble Video Wizard DVD. Great for resynching audio.
I like to lay out both tracks at the same time (the source one and the one I'm trying to sync), listen for desync between the two, slide around, cut and tweak, or whatever as needed and output nearly untouched 5.1 ac3 track.
I've tried Vegas (briefly) and found it complicated. Womble is pretty intuitive (I learned to use it without instructions and created Star Wars RtW on my first go).
Of course if you luck out, you might just be able to adjust the delay, one way or the other, and you're done.
Dr. M
I take a different approach, where possible.
Edit your HD video so it runs frame-for-frame in sync with the video from the DVD. (Hopefully this won't be much work, cutting out the occasional frame is not a problem, the only time it might get tricky is when the HD version is missing frames.)
Then just remux the edited HD video with a direct stream rip from the DVD, and it will be in perfect sync.
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I tend to do it the way Moth3r does it. The advantage of the previous methods is that you only have to re-encode the audio, which is quicker - video is slower to re-encode than audio - and better if you prioritise video quality. The advantage of Moth3r's method is that the sync should be perfect, whereas in my experience with the other methods, the result is very good, but not quite perfect as it is if you match the videos frame by frame.
If you use Womble, you should have Re-encode the whole audio if any part needs fixing checked in the options. This helps prevent compatibility problems when playing the result on fussier DVD players.