Dual Layer DVD error
by Alan Bowyer
on
Jul 4, 2009 at 10:12:03 am
Hi, I'm having a bit of a mare with prepping a dual layer dvd in DSP. I have read previous threads and followed instructions from a a manual but am still having problems.
The original footage is HD. My initial run at compressing to HD1080i PAL was an error. Too much footage and too high a bit rate. So I compressed it to FCP's '90 min -Fastest Encode' and imported it in. I realise that resolution would be compromised but needed something to show a client the early part of next week. It takes a day to compress stuff.
When I go to simulate the project the warning comes up - 'Illegal angle situation - only the main angle will be simulated'. This happen when it was 1080i and is still happening. I am using mixed-angle tracks and have used sandwich markers to mark out the multi-angle sections (there are only 2). The compression rale is 6.25mps (less than the requisite 8). Do I need to forget the sandwich markers and make both tracks the same length or is my compression choice wrong? If so, which compression rate do you recommend?
I am totally flumoxed. The clock is ticking with the client so any advice would be gratefully recieved.
Re: Dual Layer DVD error by Michael Sacci on Jul 4, 2009 at 7:49:28 pm
When using Mutli-angles you have to pay attention to details and I would guess by your post that is not a strong suit of yours (please don't take offense). Your title is "Dual Layer DVD error" and you post a problem about "Illegal angle situation"
With multi-angles you should always use CBR encoding. But the main issue that people run into is invalid GOP sturctures which gives the Illegal angle situation Every angles has to have every I-Frame is the exact same place. If you set chapter markers for one stream and not the other it violates this. If you are going from FCP timeline, if cuts are different on each angle it violates this.
Safest way to encode for multi-angels is to export each angle as a self-contained movie, with no markers. Bring both angles back into FCP and place them in V1 and V2 in-sync with each other. Then Export>Using Compressor with a CBR preset (you have to make one) use Closed GOP also.
Test this out as a simple multi-angle and then if it works add your markers in DVDSP.
Re: Dual Layer DVD error by Alan Bowyer on Jul 5, 2009 at 12:00:46 pm
Thanks for your response - no offence taken. You're right I am out of my depth.
I'm currently doing as you suggest and exporting from FCP to import, synch and export again. To retain the HD quality and be able to fit 2 hrs onto a DL disc - what compression do you recommend? Also, how do you set a CBR preset using compressor?
Once I've synched them up back in FCP do I then need to export them individually? 1 version for each angle stream?
Sorry about the post title - I am rather new to this and, like I said, am out of my depth.
Re: Dual Layer DVD error by Michael Sacci on Jul 5, 2009 at 6:08:49 pm
To clear some more stuff up, you cannot retain HD quality on DVD. DVDSP can author HD DVDs but that is a dead format, can only be played back on Intel Macs and discontinued HD DVD players. The other option is BluRay (need something like Encore to author them on a Mac) but the disc are really expensive and they can only be played back on BluRay players. So most likely you are going to produce SD DVD, while they not be as good as HD content, they can be great quality. So make sure you are not setting your project to HD DVD, once that is set there is no going back and you will have to start all over.
Choose a mpeg2 preset and then modify it.
Encoder Button (just below the Description)
Quality Tab
Mode: One pass CBR
Average Bit Rate 6 Mbps (max of 175 minutes of total video with ac3 stereo audio on a DL dvd)
I would do short 10 minute test on DVD-Rs to save money, you will be able to evaluate encode quality and test the multi-angle.
