-
Exporting DNxHD footage is blowing out bright whites (making turquoise!)
Here’s a link to a video with the obvious problems: https://youtu.be/oaptxbXqji0?t=17s (at 17 seconds the motorcycle lights are turquoise- and throughout.)
This problem is not seen in the first export but only after importing and exporting again. The obvious solution is to remove all the intermediate renders from the timeline and simply let Premiere Pro render the entire project at once. But I do not like this option since an error or crash at anytime during the long rendering will result in a lot of wasted time. That, and I would like to know WHY this is happening.
The footage is mostly from the Canon T2i (h.264 footage mov). I graded it using Magic Bullet Looks. I exported (and then imported) a few smaller sections of the 17 minute video in order to keep my end of the project rendering time to a minimum.
I used Avid’s DNxHD as the intermediate render which I imported back into Premiere Pro to add to the timeline and finalize with a filmgrain. The intermediate encoding is DNxHD color:709, Alpha: none, Resolution 1080p/29.97 220 10-bit. Rendered with “Maximum depth” with “24” selected.
When I color it in MB I always add “Auto Shoulder” to the end of the effects which keeps the brights legal. However, I noticed that once I import the DNxHD render back into Premiere Pro the brights are above 100%. This I assume is the cause for the problem of brights being digitally distorted upon re-export.
But what’s the solution? Do I have to add the auto shoulder AGAIN to the DNxHD clips? What could I have done in the first place for the first intermediate render? I chose 220 10-bit with Max Depth because I was getting banding with vignettes. Even exporting as DNxHD results in the overexposed white being clipped to turquoise.
Thank you!
-Stephen -
10 Replies
-
Here’s a link with a similar problem: https://www.newschoolers.com/ns/forums/readthread/thread_id/700843/
They suggested turning off Max Depth and Max Render. Max Depth is the only one i had checked (because of the banding issue). I’ll try turning it off and see what happens. If it does work I’m back to where I started though with the banding issue 🙁
-Stephen -
Unchecking Max Depth does fix the issue, but now my banding is back…
-
DPX 709 does not work properly for me (MOV wrapper); it truncates the colors and then blows them out. Try either DNxHD 10-bit RGB or other codecs like AVC-Intra, uncompressed YUV 10-bit 422, or DPX.
-
Is this in CS6 or CC? If in CC, are you using the DNxHD MXF codec?
TimK,
Director, Consultant
Kolb Productions,Adobe Certified Instructor
-
“DPX 709 does not work properly for me (MOV wrapper); it truncates the colors and then blows them out. Try either DNxHD 10-bit RGB or other codecs like AVC-Intra, uncompressed YUV 10-bit 422, or DPX.”
Thanks Ivan,
I am using DNxHD 10-Bit (but it is .mov wrapper.) But I had read somewhere that 709 was better than RGB for some reason- but I honestly don’t recall why or where I read that. I’ll try the RGB instead and see what happens. Thank you!AVC-Intra would be .MXF wrapper, right? I tried that and it ended up changing the color tint ever so slightly upon re-importing the .mxf file and dropping into the timeline.
I’ve never used .DPX. There are TOO MANY export options that I don’t know where to start! I guess that’s a good thing, but a bit overwhelming. I would love to know what to use for uncompressed “intermediate” renders (NOT to be archived) as well as a great archive version with high quality but a decent compression so I’m not ending up with ridiculous file sizes.
-
“Is this in CS6 or CC? If in CC, are you using the DNxHD MXF codec?”
I’m using CS6.
-
[Stephen Pickering] “But I had read somewhere that 709 was better than RGB for some reason- but I honestly don’t recall why or where I read that.”
There is reduced risk of color conversion artifacts when the delivery codec is YCC (e.g. H.264, MPG, WMV, Sorenson, etc). Issues are reduced with 10-bpc codecs.
[Stephen Pickering] “AVC-Intra would be .MXF wrapper, right?”
Yes.
[Stephen Pickering] “I would love to know what to use for uncompressed “intermediate” renders (NOT to be archived) as well as a great archive version with high quality but a decent compression so I’m not ending up with ridiculous file sizes.”
In general, 10-bit, all intra-frame, 422 or 444 with light compression or uncompressed:
– ProRes (Mac only with FCP or Compressor installed)
– DNxHD (HD resolutions only)
– AVC All-Intra (HD resolutions only)
– GoPro Cineform
– Uncompressed 4:2:2 YUV/V210
– Uncompressed DPX 4:4:4 (10-bpc YCC in Premiere, more options in AE)PNG and JPEG2000 image sequences are frequently used also, but 8-bit RGB is susceptible to banding (as described above).
-
Not to derail the thread Stephen, but I love the opening music…what track is that?
J.Cummings
Cameralogic Inc.
Chicago/Cleveland
Sony F3/HDX-900
cameralogictv.com -
Thanks for that information Ivan!
I’ll try out some of the other light/uncompressed codecs as the issue I dealt with was with DNxHD and the whites being over-exposed upon export. It was an easy workaround (I simply turned off max depth) for the next exports) but it again left me with some subtle banding.
I used to use MXF but I don’t recall the settings I was using or why I switched. I’m sure I have a preset somewhere to start trying different settings again.
Thanks again for sharing your knowledge!
-Stephen Pickering
-
“Not to derail the thread Stephen, but I love the opening music…what track is that?”
Thanks John,
The music is “The Grand Reveal” by Tim McMorris https://audiojungle.net/item/the-grand-reveal/4747460If anyone’s interested in seeing the non-turquoise version 🙂 it’s posted here. https://www.youtube.com/watch?v=m_KntiT48uU
To get rid of the color distortion upon export I had to turn off Max Depth- this worked for all export codecs I tried (DNxHD, H.264, etc).
If anyone can give a reason or solution which enables me to always use max depth I would still be open to hearing the reason! But for now at least this works for my needs.
Thanks!
-Stephen Pickering
Some contents or functionalities here are not available due to your cookie preferences!This happens because the functionality/content marked as “Google Youtube” uses cookies that you choosed to keep disabled. In order to view this content or use this functionality, please enable cookies: click here to open your cookie preferences.
Reply to this Discussion! Login or Sign Up