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Issues getting ripped HEVC 10 bit 4:2:0 footage to scrub well

Forum|Forum|3 years ago
April 9, 2022
4 답변들
4215 조회

Hi,

I'm currently trying to edit with ripped 4K HDR footage that's HEVC 10 bit 4:2:0 and I can't seem to figure out how to get this footage to playback smoothly in Premiere when I'm scrubbing.

I'm starting with ripped m2ts files directly from the disc, that is then recontainered to mov (still HEVC). H264/HEVC accelerated decoding is enabled (with a visible checked box for Nvidia).

I've even tried low resolution H.264 proxies and that isn't working either so I'm not sure what I'm missing here. I understand that my processor might not be a new enough generation to support all the latest features but my GPU should be more than enough for this to my understanding.

Any idea what I'm missing here?

My hardware is as follows:

GPU: Nvidia RTX 3090 Ti
CPU: Intel i9 9900K

RAM: 64 GB DDR4

Windows 10 64 bit

이 주제는 답변이 닫혔습니다.

C

Carey297031781k4g

Participant

Hi I have been struggling with the same problems I did find a YouTube video that helped. Understanding Video Codecs by Chris Olsen. It seems the type of codec affects how the computer reads and edits.

A

Andy 1968

Inspiring

I think Premiere Pro can encode and decode that codec with the M1 chip and Alder Lake CPUs. You might have to use proxies. Having said that it might be best to record in 8 bit as opposed to transcoding.

chrisw44157881

Inspiring

here's the h.264/5 accelerated playback chart.

https://www.pugetsystems.com/labs/articles/What-H-264-and-H-265-Hardware-Decoding-is-Supported-in-Premiere-Pro-2120/

T

Th3On3Fr33man작성자

Participating Frequently

My source is HEVC 10 bit 4:2:0 but it doesn't scrub well with my RTX 3090 Ti (originally m2ts recontainered to mov with pcm audio)

That article implies it should work though?

chrisw44157881

Inspiring

It's really always gonna be CPU dependent? (I'm stuck with LGA 1151 mobo)

Is there no way to circumvent the processor requirement with a codec or something that wholly relies on the GPU?

try prores proxies

R Neil Haugen

Legend

I'm not sure what exact hardware yours has for HEVC encoding, and maddeningly it can vary dramtically by the CPU involved. @RjL190365 is the expert here on that.

Past that, long-GOP media like this is a complete mess for editing. To make every frame of video, the computer has to look typically both forward and back, essentially recreate a number of frames, to be able to display each one. Because that isn't stored as complete frames.

You have highly compressed but complete frames every 9 up to 120 frames apart (in some odd drones). In-between you have only matrix sets of image data that have changed from the previous, next, or BOTH ... complete frames. A real hard bit of computing.

And going to H.264 proxies doesn't help ... that's also long-GOP media. Going to Cineform, ProRes, or DNxHD/R for proxies may get much larger files on disk ... but every frame is complete. Vastly easier for the computer to work with.

And you can dump the proxies after completing the job.

Neil

Everyone's mileage always varies ...

T

Th3On3Fr33man작성자

Participating Frequently

Ok I had seen the tips online about Cineform being better so I already started encoding a low res proxy of one of my sources.

If it matters, I'm using PCM audio (to maintain the 5.1/7.1 [can't remember] audio track).

I used to convert all my sources to UTVideo AVI but I was told that doesn't work well for 4K HDR so I'm just trying to find the best workflow here to make this scrub/playback well during the editing process.

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