Laggy playback when slowing down the speed/duration of proxy footage

[Fernando21845737l9if]

Hello,

I´m editing a 4K footage with proxies. I recorded everything in 59.94fps and created proxies with 1280x720 and 59.94fps.

When I playback the proxy footage, it plays smoothly, but when I slow down the speed/duration of it to 40% (to create the slow motion) it plays very choppy frame by frame. If I disable the proxy, it plays the slow motion smoothly..

Shouldn´t it be the opposite?

I won´t interpret footage because I need to speed ramp some clips and keep others with normal speed.

PC specs:

Windows 10 Pro

Intel(R) Core(TM) i9-10900 CPU @ 2.80GHz 2.81 GHz

32,0 GB RAM

GTX 1660 (not super or Ti)

500GB SSD (currently editing the project and footage on an external HD)

All brand new components, less than an year.

I´ve always used this method, seems like it´s not working right now.

Please, can you help me?

[Ged_Traynor]

Hi

Can you tell us which Adobe application you're using so we can move the thread to the correct forum

[Fernando21845737l9if]

Hi Ged,

I´m using Adobe Premiere Pro 22.4 Version

[Peru Bob]

I've moved this from the Using the Community forum (which is the forum for issues using the forums) to thePremiere Pro forum so that proper help can be offered.

[Ann Bens]

This external drive, what kind of drive is it?

[Fernando21845737l9if]

Seagate Expansion, 4 TB. Currently, 1,5 TB available.

Used it for all my preview projects

[R Neil Haugen]

 I hope the proxies are Cineform or ProRes/DNx ... and not H.264. The first three would have better playback.

Neil

[Ann Bens]

I prefer prores 422lt. They are a tad smaller then Cineform.

[Fernando21845737l9if]

Take a look at the proxy specs attached (proxy specs1; proxy specs2)

Quicktime; GoPro Cineform

Quality 1

YUV 10bpc

[Fernando21845737l9if]

@R Neil Haugen 

[R Neil Haugen]

Was the Quicktime format ProRes?

The Cineform ones should be fine, though ... that's actually about the best playback format made for most systems.

I'm wondering if @mattchristensen could pop in and suggest something ...

Neil

[Fernando21845737l9if]

Hi Neil,

The format was Quicktime and the predefinition/video coded was the 10 Bit GoPro Cineform.

@mattchristensen could you help us with this issue?

Thanks in advance!

[Fernando21845737l9if]

whatever right.. 

[Fernando21845737l9if]

Turns out that if I choose the playback resolution to play in Full (within proxies enabled) it plays smoothly