Airshow SD DVD.

Action wrote on 1/8/2010, 8:14 PM
Hey all. I'm taking over an SD DVD production. It was shot PAL HDV 16:9 widescreen 1080i 50i on 3 different cameras and it's mostly finished, sitting there on the VMSP 9b timeline, interlaced.

But now comes along a separate 5min (same format) insert to go in, with 3 tracks of video and 4 tracks of complicated audio which I rendered with the Mainconcept DV codec. This gave me a 1 video track and a mixed stereo audio track file, it looks great and I've edited this render into the show. It looked to be too difficult to insert the original.

My question is ....do I now prerender the whole show with the Mainconcept codec on its way to DVDA 4.5? Or should I use, and what would be the best deinterlace procedure/program to use first?.

Would the insert be rendered again or would the MC codec ignore it?

Cheers.

Comments

Action wrote on 1/10/2010, 1:17 PM
Ken or Tim L,
did you see this above .. any ideas?

Cheers.



Tim L wrote on 1/10/2010, 3:19 PM
Action,

I'm not too sure how to answer this because I don't really have any similar experience.

And when you say you rendered to the Mainconcept DV codec, do you actually mean you rendered to Mainconcept MPEG2 (ready for DVD)?

So I think you have an HDV project with HDV media on the timeline, and somewhere in the middle you have five minutes of MPEG2 PAL std def video ready for DVD? Is that right?

Anyway, Vegas (Pro) I think "smart renders" MPEG2 and HDV video, so if the video on the timeline is the same format as your render output, and it's bit rate doesn't exceed the target for your output template, then the timeline media is copied directly to the output file without any recompression. I assume VMS does the same as far as smart rendering, but I don't know for certain. Also, I think if you watch the preview window during the render I think it will say something to that effect -- shows text indicating that it is not re-rendering that part of the timeline. But, I almost always work with just std def video so I don't know for sure.

You would have needed to set the de-interlace properties correctly when you rendered the 5-minute video because that is where the resizing (hi def to std def) occurred. In this case, the output video isn't really being de-interlaced -- i.e. it's not being converted to progressive output -- but the de-interlace properties tell Vegas how you want to take a 1080i source frame and resample it to convert it to a 576i frame.

Another possibility would be to render your 5 minute project as HDV and then bring it into the timeline as HDV. This way the conversion of your hi-def timeline to std def DVD would be consistent.

Sorry I don't have real solid advice for you, but the few videos I actually work on are almost always std def from start to finish.

Tim L
Action wrote on 1/10/2010, 7:37 PM
Thanks Tim. Yes to the first question, I did render the 5mins like that because I didn't want the hassle of inserting many video/audio tracks into the program.
I ended up with one rendered video track and a mixed stereo audio track, which I just pasted into the program timeline at the right spot.

And yes to the 2nd question but the 5mins is also HDV not SD, and you've given me some clues in your last satement.

I'll try pre-rendering the whole job with the MC codec to DVDA deinterlacing it first. I'll post a summary of what happens.

Cheers.