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Avid DNxHD Jagged Text

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Alex Chaloff
Avid DNxHD Jagged Text
on Jul 18, 2015 at 7:21:48 pm

Hey Folks. I'm running into a problem when I try to render out master Avid DNxHD files for client delivery. In Vegas (13) my text layers are perfectly crisp. However, when I render to Avid DNxHD, they get destroyed. All other small details in the footage looks great in the render. It's just the text elements. I thought it might be an issue with my quicktime 7, but when I upload to youtube and vimeo, I still see the compressed text issues.

On the flipside, when I render out Sony XAVC (or even a mainconcept mp4), the text retains its sharpness (even when uploaded to web).

Here are some pictures... avid on top, screenshot from vegas below.




Any ideas? The record label uses an ingestion software that requires an .mov master.


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John Rofrano
Re: Avid DNxHD Jagged Text
on Jul 19, 2015 at 12:52:57 am

First, I don't see any difference in the title on those two screen shots (sorry)

Second, you didn't say how you have Avid DNxHD configured. Are you using 220 10-bit? 220 8-bit?, 145 8-bit? 36 8-bit? Try increasing the data rate and/or bit depth and see if that helps.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Alex Chaloff
Re: Avid DNxHD Jagged Text
on Jul 19, 2015 at 1:05:04 am

Here are some more stills... Up close, all the edges are jagged.

XAVC: testfromxavc.jpg
VEGAS: testfromvegas.jpg
AVID: testfromdnxhd.jpg

Doesn't matter which flavor of DNxHD. This particular one is 175 10-bit. Looks the same as 36 8-bit.


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John Rofrano
Re: Avid DNxHD Jagged Text
on Jul 19, 2015 at 4:23:28 pm

[Alex Chaloff] "Up close, all the edges are jagged. "
Yea, I can see it now. I'm not sure what you can do about that. It looks fine in Vegas Pro so it's gotta be something with the DNxHD codec not handling those sharp edges.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Steve Rhoden
Re: Avid DNxHD Jagged Text
on Jul 19, 2015 at 1:06:45 am

Sorry, not seeing anything different text wise from the images you
uploaded. Anyway, i dont know of an issue regarding text quality
reduction in DNxHD renders.

Steve Rhoden (Cow Leader)
Film Maker & VFX Artist.
Owner of Filmex Creative Media.
Samples of my Work and Company can be seen here:
http://www.facebook.com/FilmexCreativeMedia


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Alex Chaloff
Re: Avid DNxHD Jagged Text
on Jul 19, 2015 at 1:20:48 am

Try these ones...

Avid:avid3.jpg
Sony: sony3.jpg


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Aaron Star
Re: Avid DNxHD Jagged Text
on Jul 19, 2015 at 6:12:24 pm

Your master footage on the timeline is what resolution, codec, and bit rate?

Are the text items photoshop overlays, or sony text generator?

Ffmpeg might produce better results, and you can put the dnxhd into mfx container rather than mov.

If you are in 4k, vegas xavc-i to ffmpeg, to dnxhr.

If you are in HD, vegas hdcam sr or sr-lite, ffmpeg, dnxhd.


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