Blu Ray motion jumpy

emo wrote on 3/30/2012, 10:54 PM

I almost have a perfect render from Vegas to DVDA to Blu Ray. The problem is in motion shots, there is a jumpy look, as if you can see the individual frames and there's a microsecond delay before the next frame. I've tried all sorts of different combinations, and this is the best I've gotten:

MainConcept Mpeg2, 1440x1080, 29.97 fps, 16:9, I frame 15, B frame 2, Profile Main, Level High, Order none (progressive), High quality, variable bit rate with a max at 30. I'm using windows 7. My source is 1440x1080 24 fps high def.

I keep these the same in DVDA, and even though these should be compliant, DVDA still wants to compress again which is time consuming and probably affecting the quality. The rendered mpegs play fine before they go into DVDA, so the problem seems to be happening in DVDA (BEFORE the compression and burning to Blu Ray).

1. What is the best format to render to to avoid DVDA recompressing? Even the "blu ray" option in the mpeg2 menu isn't good enough...DVDA still wants to compress it.
2. How to get rid of the jitters?

Comments

johnmeyer wrote on 3/30/2012, 11:10 PM

I don't do Blu-Ray, but taking 24 fps progressive and rendering it to 29.97 fps progressive seems like a really bad idea. Instead, render it to 1440x1080 24 fps progressive.

Also, if you don't want a "jumpy look" with motion, then you definitely do NOT want to be shooting using 24 fps. That low frame rate will make all horizontal camera pans look very, very jumpy, unless you can keep the pan rate very slow and smooth. Use 29.97 interlaced instead ("60i").

PeterDuke wrote on 3/30/2012, 11:12 PM

It is a known problem that DVDA recompresses HDV clips when it shouldn't. You can buy TMPGEnc Authoring Works for $100 which doesn't, I have heard.

Re the jitters, I see that you have 24 fps presumably progressive and are rendering to 29.97 fps progressive. Try experimenting with video properties set to "smart resample", "force resample" or "disable resample".

emo wrote on 3/31/2012, 8:23 AM

I doubt it's the recording. The motion is smooth in the raw footage, in Vegas, and in the resulting rendered file. It's only once it gets into DVDA that the jumpiness starts.

I'll have a look at TMPGEnc...$100 is easily worth the time I've spent trying to resolve this issue. Where are these resample options? I'm not necessarily trying to make a higher frame rate file, that's just what has had the best look so far. I'll use whatever format DVDA will work with that gives me as close to source quality as possible. Sonar/DVDA have little in the way of advice on this, and assume the user has familiarity with the process. No other part of movie making has been this time consuming or frustrating.

Arthur.S wrote on 3/31/2012, 8:50 AM

emo, I think Peter is right. DVDA recompresses HDV, which is probably what's causing your problem. There are ways around it, do a search here. There's one particular loooooong thread on it.

MTuggy wrote on 3/31/2012, 11:51 PM

Are you sure your source recording is progressive scan. I have seen what you describe when I though footage was progressive scan but it was actually upper field first and I just has to correct it in the clips I imported where the field order wasn't read properly by Vegas (it was a weird Sanyo codec). As mentioned before going from 24 fps to 29.97 could also be problem inducing as well.

MT

emo wrote on 4/1/2012, 1:52 AM

Yup Peter's right. TMPGEnc is incredibly easy to work with and gave me a beautifully rendered Blu Ray. Well worth the 100 bucks. Thanks Peter you're my new best friend. Sony, take note...

PeterDuke wrote on 4/1/2012, 2:52 AM

Thanks should be directed to Nick Hope. He (I think) first mentioned it.

Arthur.S wrote on 4/1/2012, 6:52 AM

It seems like a lot of us here have been saying "Sony take note" for an eternity. :-(