Hans Vernhout
Forum Replies Created
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In addition to my earlier reply: Davinci Resolve 17.1 appeared to have some GPU issues on our Mojave setup. We upgraded to BigSur which solved the problems.
So Mojave may not be a solid setup with Resolve 17.1 after all.
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Maybe I did not discover the incompatibilities yet but on our iMac 5K Resolve 17.1 Studio is running just fine under Mojave (10.14.6).
I would just try to run it and see what happens on your system.
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I tried the Google translate route and read the garbage that came out of it. Even if you could have understood half of what is written I would have been happy to send it to you. But unfortuantely it becomes damaged beyond recognition. 🙁
Hans Vernhout
Director / lighting cameraman
The Netherlands -
Hi Elijah,
[Elijah Lynn] “The XDCam and SDI clips looked the same to me.”
We concluded in our testing that the 35Mbit/s SxS (4:2:0 sampled) footage looked very much like the
10-bit 4:2:2 footage captured live via our IoHD to ProRes HQ from the SDI-output of the EX1. There are subtle differences, but for a good chromakey the heavily compressed SxS footage holds up remarkably well. Before the test we had anticipated a much bigger difference.[Elijah Lynn] “It appears to me that you can get very nice results with the Mpeg 2 and the ProRes HQ capture may not be entirely necessary.”
Yes, that’s exactly what our testing proved.
[Elijah Lynn] “The report looks very interesting and would be great to understand more fully.”
It is a lot of work to do a proper English translation myself, and I don’t think many people are still interested in another report about the EX1. But feel free to ask specific questions you have, and I might be able to answer them with findings from on our tests.
Hans Vernhout
Director / lighting cameraman
The Netherlands -
Hi Elijah,
Unfortunately, no. The offer we got back in 2008 to translate the report in English didn’t substantiate and I didn’t have time due to deadlines and English not being my mother language.
In the meantime some excellent EX1 reviews and test came out in English. I don’t know what you already researched yourself but the following links provide some very good starting points for getting to know the EX1:https://provideocoalition.com/index.php/awilt/story/review_sony_pmw_ex1_1_2_3_cmos_hd_camcorder/
https://www.dvinfo.net/conf/sony-xdcam-ex-cinealta/
Kind regards,
Hans Vernhout
Director / lighting cameraman
The Netherlands -
Thanks André,
[Andre Simons] “The mdworker process is part of Spotlight. “
Would it help to let Spotlight re-index?
[Andre Simons] “I notice AFP in the backtrace. That seems odd.”
I’m a newbie with OS X. Why is AFP in the backtrace odd? Is there anything we can check or change to get rid of the crashes?
How likely is it that a bad memory module could be the culprit? Or does the log point in another direction? The memory worked flawlessly for some month.
Thanks for your time!
Kind regards,
Hans Vernhout
Director / lighting cameraman
The Netherlands -
Ed,
I see that you joined the cow on June 27th and this is your first post in this wonderful community. On the Cow we all try to help each other by offering workarounds for software bugs, sharing hard won expertise on software or hardware configurations, etc.
As you might be aware by reading the forums there is a lot of expertise and many seasoned professionals are willing to help with serious problems in work related matters. Bashing software or computer brands in general doesn’t add to your or our learning experience. Venting frustration is understandable, but professionals differ from amateurs in that they don’t get stuck in flame wars.
So may I suggest you take the time to give a detailed report of your workflow so we all might get some benefit out of your postings and the replies offered by others? Maybe your problem can be solved without spending a lot of money, and even if it’s operator error somewhere down the line it is a learning opportunity for us all, but only if we know the outcome.
Looking forward to your posts!
Kind regards,
Hans Vernhout
Director / lighting cameraman
The Netherlands -
Correct. That’s because you’re comparing the total amount of luma and chroma information that is in HD sized (EX1) vs. SD sized (digibeta) frame sequences. We did that same comparison in our testing as well, because Dutch national tv is still broadcasting in standard definition, so EX1 shots used for Dutch tv will end up in an SD broadcast anyway.
But even if you look at the ‘chromakeying potential’ of the 4:2:0 sampled 1920×1080 frames itself (HQ mode 35 Mbit/s), the codec of the EX1 performs surprisingly well.
This is important, because people tend to place their HD tv-sets at the same spot their SD-sets used to be, so they see more resolution in HD programs and DVD’s, and sampling/chromakeying artifacts are more easily noticed (by viewers with normal vision).
In reality the relation between frame size, chroma and luma sampling, compression, etc. is a very complex one. A real world test can clarify quite a bit.
Hans Vernhout
Director / lighting cameraman
The Netherlands -
The keys that you can pull from the EX1 are very good.
I did test the EX1 for a shoot for Dutch national television we were going to do in China (there will be an English translation of the test report) and the chromakey capabilities of the EX1 shots were better than the footage from our Sony DVW-790 digibeta camera.
You can find some test clips of a quick and dirty chromakey setup with the EX1 and the DVW-790 digibeta at https://www.vocas.nl/praktijk_pmw-ex1.htm
The link to the (fullres) clips are at the bottom of the page. We did a quick, single key with Keylight without spill suppression etc. to get a fair comparison with the digibeta PAL footage.
Even the 35 Mbit compressed HQ footage from the SxS cards did key remarkably well, and will be usable for all but the most critical of your chromakey setups. This was a big surprise for us, as the clips on the cards are heavily compressed with 4:2:0 sampling.
Hans Vernhout
Director / lighting cameraman
The Netherlands -
Sure. Audio and timecode is embedded in the SDI signal.
Hans Vernhout
Director / lighting cameraman
The Netherlands