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vigilant_spb
Known Participant
May 7, 2018
Question

Slow HEVC 265 encoding. Very slow!

  • May 7, 2018
  • 6 replies
  • 7527 views

Hello. Win 10 64bit, Ryzen 7, 32 Gb, 1060 6Gb, 2xSSD, latest updates for Premiere Pro.

No problem with exporting 100Mbps 264 in 4k.

When I wanna export 5.7k using HEVC and 100Mbit bitrate, first  ~10 seconds of rendering are pretty fast, for 10 minute VR video with some effects it says remaining time is 40-50 minutes and it's ok. But after 10 seconds preview freezes, encoding slows down extremely, remaining time grow 2-5-10-more hours and seems endless.

Using default settings like 7 or 10 Mbps and so on works fine, it's not super fast but it does the job and no stops.

What can be the reason?

* I'm not pretty sure what bitrate is ok for YouTube 5,7k VR uploading when encoding it to HEVC. Can anyone give me an advice about that?

This topic has been closed for replies.

6 replies

ronakp98311100
ronakp98311100
Participant
July 23, 2018

any update from Adobe on this? I'm experiencing the same things trying to encode to h.265....in Ultra HD 4k h.265 encoding...a 20sec clip takes 43min on a 32 core machine!

V
vigilant_spbAuthor
Known Participant
July 23, 2018

no updates but..

1. choose "Good" quality, it will look ok and encode MUCH faster

2. last update !!!FINALLY support export up to 8k for .264!!! so if you wanna export > 4k and .264 is ok for you it's great

V
vigilant_spbAuthor
Known Participant
May 19, 2018

wrote to chat, asked to reply here.. ADB-2200451-N1X6 sure no one will

V
vigilant_spbAuthor
Known Participant
May 19, 2018

↑ my task manager screenshot, AME is rendering 5,7k file, why does it use only half CPU and no GPU?

V
vigilant_spbAuthor
Known Participant
May 19, 2018

found one interesting article Adobe Media Encoder: H.264 vs. HEVC (H.265) | Larry Jordan

here are tests for different setting and example, the author used 13 seconds source file and

This 13-second clip took:

  • 17 seconds to compress using HEVC at the Good Quality level
  • 60 seconds to compress at the Higher Quality level (3.5x longer than Good)
  • 471 seconds to compress at the Highest Quality level (27.7x longer than Good)

I can't see any difference or SUCH A BIG differense between Good and Highest setting, definetely it's not 27 times (or even 27%) better.

Still wanna hear smth from Adobe. PP isn't free, I pay money by the way..

V
vigilant_spbAuthor
Known Participant
May 13, 2018

now encoding 5.7k video, 265 codec at CBR 64Mbit "Higher" setting, slow, but works. Highest - don't.

Also I see 40-50% CPU utilization and 0-30% GPU.

Tried to encode same file to 264 like 10Mbit and downscale it to 2048*1024, it was 80-90% CPU utilization and up to 85% GPU. What's wrong with the Premiere Pro and why should I pay for that kind of support? Any comments from Adobe?

V
vigilant_spbAuthor
Known Participant
May 8, 2018

Some experiments, it seems to me that problem is "Quality" setting. When there's default good it's really good) Speed is ok. Set "Higher" or "Highest" and it freezes after 10 seconds, all the settings same. When freezed it utilizes CPU but no progress, trying to stop encoding causes "app is not responding" and I've to kill the process via task manager.

Experiment was on 75Mbit bitrate setting. I have no time to do multiple tests, just wanna AME works fine with any settings

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