MacPro late 2013: green and magenta horizontal lines on exported videos

Hi Danielleary,

thank you for your interest.

The original format is mixed:

• 4K DCI dng sequences (generated by a Blackmagic Cinema Pocket 4K camera);
• 4K UHD h264 files (generated by a a Panasonic GH5 camera - I don't remember which model of GH5).

I had the same problem also while editing dng sequences mixed with Apple Pro Res clips (both generated by a Blackmagic Cinema Pocket 4K camera), and 1920x1080 dng sequences (from Magic Lantern Raw on a Canon Eos 5D MkIII).

On Resolve, I've exported to TIFF sequences, Apple ProRes 422HQ, and h264 (using YouTube DaVinci's preset, Vimeo preset, and a custom h264 set).

Timelines resolutions varied from 1920x1080 to 4K DCI.

Export resolutions were reflecting timeline's ones.

For anything else, please let me know.

Best,

Stefano.

Hi, and thanks for you contribute.

Yes, I've blown the dust with a vacuum cleaner (being really careful), but nothing happened on the new startup.

I've installed MacFansControl as you suggested, and I've performed 3 tests, monitoring the temperature and capturing images of the screen with all the datas, during the export. I've also captured screenshots of some examples of the occurred coloured lines and glitches. I'll publish a few screenshot here below, while here a wetransfer link to a zip file containing the complete monitoring I did: https://we.tl/t-sjxYYMK6zM. For privacy reasons, I had to cancel some elements with big pixels. Of course, these pixels are not the object of my issue. The file names should help to understand the process, after read the description below.

Here's my test:

First of all, I've captured a screenshot of MacFansControl monitoring the normal temperature of the hardware (while not rendering). Attached here below marked with the yellow text "NORMAL".

ROUND 1: video export on Davinci Resolve at maximum frame per second render speed. Glitches started appearing at 35% of the exporting process. I'll publish here below the values in the closest moment I could capture (37% of the exporting process). I'll mark this picture with the yellow text "REF 1".

ROUND 2: same like before, immediately after (with the hardware already "hot"). Glitches started appearing at 01% of the exporting process. I'll publish here below the values in the closest moment I could capture (37% of the exporting process). I'll mark this picture with the yellow text "REF 2".

ROUND 3: video export on Davinci Resolve at 1 frame per second render speed. Glitches started appearing at 35% of the exporting process. I'll publish here below the values in the closest moment I could capture (01% of the exporting process). I'll mark this picture with the yellow text "REF 3".

What would you suggest? Trying two new exports (at maximum fps render speed, and at 1 fps render speed) with the macpro fan(s) pushed at maximum speed with MacFansControl, to see if the problem will appear again?

Thank you very much, to you, and to everybody is spending/has spent their time on this. I really appreciate.

Here I'm back. I've been testing for all these days while working, turning on MacFansControl on startup, pushing Fans to full blast, editing and trying to render.

Unluckily the problem persist.

If I shout down my machine and I disconnect the power, rebooting after a minute with cmd+alt+P+R sometimes I'm lucky and I don't have glitches for a while... but it doesn't sound such a scientific method, since it doesn't solve the problem 100% of the times.

Well, I would love to hear Apple's official point of view on the matter.

It's quite a serious problem.

All the best,

and thank you very much to everyone who spent his time to help me.

Well, since this should be all about this problem, here's my last words.

THANK YOU VERY MUCH TO ALL THE KIND GUYS ON THIS FORUM WHO SPENT THEIR PRECIOUS TIME TO SUPPORT ME.

LESS THANKS TO APPLE: I'd love Apple guys out there would know they've just lost a good Client from Italy, which was spending his money in their company's products since around 20 years.

Sadly, I have no interest in playing with phones and lose face and time with potential new failures of professional machines. And it's late to successfully convince all those people around me to trust your products, since they already saw - and suffered with me - what is happening to my/your machine.

Years ago I was proud to be an Apple user. Now I feel embarrassed and guilty.

Best,

Stefano Bianchi.

Hi, and thank you very much for your important suggestion.

Unluckily I've just tried to run it, and it says everything is ok. Reference code is ADP000.

Thank you very much for your fast feedback.

I will test, and post the result as it can stay for the next after me.

Thank you very much!

Thank you very much :)