2 pass encode question...

clearvu wrote on 6/23/2004, 6:12 PM

This is supposebly a new feature with the recent Vegas upgrade.

In simple terms, what exactly is this? From the sounds of it, am I right in assuming that a video is run through twice? If so, does it increase rendering time a lot?

When and why would one use this?

Thanks for any help.

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clearvu wrote on 6/25/2004, 2:52 PM

In MY case, the VHS signal was captured with the ADVC-100. The 300 came out about a month after I bought the 100. Is the 300 really that much better?

farss wrote on 6/25/2004, 4:05 PM

IMHO yes, I don't think the 100 has time base correction which is a big help if the signal coming off VHS isn't stable. Also the Dynamic Noise Reduction helps a lot. Everything else you can pretty much do after capture. It seems some of the VD filters can do the same type of temporal noise reduction but it takes a long time to process.
The 300 has a lot of proc amp adjustments that you can tweak on the fly, which when time is money can be a big help.
Only thing wrong with the 300, heaps of really good features which are pretty well undocumented so you can end up doing a lot of trial and error stuff.

clearvu wrote on 6/25/2004, 4:18 PM

The following previous post has not yet been answered:
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So, since it's possible that I've screwed things up considering, 1) my video results did not jump out as certainly better, and 2) DVDA2 re-renders the file, can someone please outline exactly how to set up a "2-pass" render?

What I did was I used the "DVD Architech NTSC Video Stream" template and went to custom and then checked the "2 pass" to ON. That's all I changed. Is this the correct way of doing it?

farss wrote on 6/25/2004, 5:35 PM

You're doing it the right way. However I suspect the reason DVDA re-encoded it was maybe the file was too big to fit onto one DVD. If that's the case you need to reduce the bitrate and/or use ac3 audio.
How long is the source video?

clearvu wrote on 6/25/2004, 6:44 PM

The source was only 1 hour and 20 minutes and I always use AC3 audio. I'm just stumped as to why DVDA would want to render everything again.

Grazie wrote on 6/25/2004, 11:55 PM

farss .. Last night I did a PAL DVD from V5a. I checked 2 pass - created my OWN template with 2-pass. It hen re-rendered in DVDA2. This I guess was the need for it to do AC3. I also guess if I removed AC3 within DVDA2 - no 5.1audio needed here - then DVDA2 would NOT rerender? farss am I correct? . .Length of project 7:30 mins . . this was a test for 2-pass and show off to the client that his project was on DVD . . . . that bit worked!

So, re-render will happen if AC-3 is not unchecked? Correct?

Grazie