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Stuttering Credit Crawl
I am doing an HD Credit crawl 1920 x 1080, and I’m getting a pretty consistent stutter in each text I use, I’ve never had this issue, but this is the first time I’ve done it a 1920 x 1080. Is there something I need to watch out for, or be careful with?
Thanks
Daniel Elder
producer
http://www.luminair.com -
15 Replies
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I am trying out the Mercury Jones technique and well let you know if that worked.
Daniel Elder
producer
http://www.luminair.com -
The Mercury Jones preset didn’t do the trick for me, does HD have something to do with it, or does the text selection (Never had an issue before with the text I’ve used for the past 3 years), or do I need to be in 29.97 vs. 23.976? Or something else?
Daniel Elder
producer
http://www.luminair.com -
yep, there could be several issues…
since you are working in 1080i, you will need to be monitoring on an hd monitor at 100% of the actual size. if you monitor on an sd monitor the output is scaled and there will always be sub-pixel interpolation. in addition you’d probably be best off with an hd broadcast monitor that is interlaced (a crt, rather than an lcd), that way you can pickup any interlacing issues that would not be present on an lcd or other progressive display.
now, since you mentioned 23.976, that makes me think that you are working in 1080p24. and that’s not a problem until you add a pulldown. at that point it won’t work. i can’t think of a way to generate smooth vertical motion if you add a pulldown, you will get a stutter every few frames due to the way a pulldown generates the interlaced frames.
lastly, if your per frame vertical movement greater than about 10% of the frame height, the movement will not look smooth, even if your movement is in whole pixels or even scan lines… it will look rather strobe like due to the distance the text moves each frame. (note the 10% is just an estimation and is somewhat dependent on text size and frame rate).
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
The frame rate I want to use is 24p and edit at 1080p, so I have my settings at 1920×1080, frame rate 23.976 and the default pixel ratio was square pixel, I don’t know if that’s right?
The background of the crawl is a slideshow of still images, With the crawl typface as Copperplate.
I have a 20in Apple Monitor, with a quad core G5 with 4 GB of ram, and a nice graphics card.
Once I get in the office tomorrow I will upload the file to an FTP for you to look at it. Should I do a full size upload or would that be a wastee of time?
Daniel Elder
producer
http://www.luminair.com -
Iam interested to see how this plays out for you. I too need to do a credit crawl at the end of my film, Im shooting in 1920×1080 @ 23.98 as well.
In after effects, or whatever program your using is your comp set to 23.98? It should be. Try this. Copy and paste your text into after effects, and animate it there see if that fixes it, or vise versa, bring in your text as a .psd, and simply animate it up or down however you want it, still problems?
Clint Nitkiewicz Hernandez
http://www.newelementproductions.com
Film-Maker/ Blu-ray Author/ Compositor -
just a segment that shows the problem should be fine, unless the problem changes at some point…
your settings look fine, 1920×1080 is the square pixel resolution for 1080 hd and 23.976 is the actual 24p frame rate (some nle’s call it 23.98, but it is actually 23.976).
you mentioned that you are editing in 1080p, i assume that the nle project is setup for a frame rate of 23.976 (or 23.98). if it was set to 29.97, that would cause a stutter every 5th frame (essentially creating a duplicate frame every 5th frame for 23.976 media).
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Thanks for the response, it is set up at 23.976, 1920×1080, square pixels. I just did a render out and I rendered a version with the ProRez 422 codec, the Lossless Codec, the Sorensom 3 Codec, and as a Tiff Sequence.
The ProRez 422 actually played well and was about as acceptable as I’ve gotten it.
The Lossless played well, but stopped playing about 5 seconds in, my guess too much information to process?
The Sorensom 3 sucked, and I’m uploading that and the ProRez Version, and it’ll be up momentarily. That way you can see the difference
The TIFF sequence, I then rendered out as a ProRez 422 and that was almost acceptable, it had a slight stutter every 5th – 10th frame
Oh and here are my exact computer specs: Quad Core 2.5 Ghz G5, 8 GB of Ram, and a NVDIA Quadro FX 4500. I am playing from a Firewire 800 G-Tech Drive?? But when I sent to my desktop, didn’t do much better.
Will post a link shortly so you can download the files to look at.
Daniel Elder
producer
http://www.luminair.com -
If you hold down the Option Key(Mac) you can download it to your download folder, not sure on a PC.
Daniel Elder
producer
http://www.luminair.com -
I played them in both Quicktime and FCP, and FCP does handle the ProRez 422 version pretty well, there is a slight hiccup every 10th frame or so.
The Lossless version, the data rate is way to high, and can’t be handled by anything, it seems?
The Sorensom 3 still sucks
The Tiff to ProRez 422 is almost the same as the straight to the ProRez 422, but I feel the straight to ProRez 422 was handled a little bit better.
So, I think the ProRez 422 is the closest I’ve come to something that looks acceptable, but it isn’t perfect, so would that be something that it probably is fine, but my computer isn’t handling the data rate? Or do I need to still try to tweak some settings?
Oh how I wish I had one of those 8Core 3.2 ghz systems right now!!
Daniel Elder
producer
http://www.luminair.com -
i’m downloading the sorenson version. i don’t have apple’s prores codec, in typical apple fashion they make you buy fcp to get it.
like dave, i am starting to thinking that this is a data rate issue… i would need to check the data rate of prores to see if it can be played out from a firewire drive… also the g5 series had firewire data rate issues. i seem to remember that they were never capable of the full 800mb/s of firewire 800 thru the built in ports, but i’ll have to check that too.
what is the working codec of your other media… dvcprohd, prores, etc…?
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW
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