Declining Performance while editing in the Video Sequence Editor #94020

New Issue

Franklyn Afeso · 2021-12-13T15:10:32+01:00

Franklyn Afeso commented

2021-12-13 15:10:32 +01:00

System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: Intel(R) UHD Graphics Intel 4.5.0 - Build 27.20.100.9664

Blender Version
Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: f1cca30557
Worked: (newest version of Blender that worked as expected)

Short description of error
There is a steady decline of the VSE performance when editing a video, and can only be resolved by closing and reopening blender

Exact steps for others to reproduce the error
While editing videos in the VSE,
doing just a basic cut, muting and deleting of video strips,
after a while, there is a noticeable drop in performance,
the playback become laggy (even with a scene using 50% proxy)
and editing (moving of strips also start to lag).

The only solution has been to save the scene, close and reopen blender, and the playback goes back to 30 fps, but within a few minutes, I notice the Lag again.

Here's a recording that shows the difference in performance, when I close and reopen blender

VSE Performance.flv

**System Information** Operating system: Windows-10-10.0.19042-SP0 64 Bits Graphics card: Intel(R) UHD Graphics Intel 4.5.0 - Build 27.20.100.9664 **Blender Version** Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: `f1cca30557` Worked: (newest version of Blender that worked as expected) **Short description of error** There is a steady decline of the VSE performance when editing a video, and can only be resolved by closing and reopening blender **Exact steps for others to reproduce the error** While editing videos in the VSE, doing just a basic cut, muting and deleting of video strips, after a while, there is a noticeable drop in performance, the playback become laggy (even with a scene using 50% proxy) and editing (moving of strips also start to lag). The only solution has been to save the scene, close and reopen blender, and the playback goes back to 30 fps, but within a few minutes, I notice the Lag again. Here's a recording that shows the difference in performance, when I close and reopen blender [VSE Performance.flv](https://archive.blender.org/developer/F12737182/VSE_Performance.flv)

Franklyn Afeso commented

2021-12-13 15:10:32 +01:00

Added subscriber: @afeso

Richard Antalik commented

2022-02-03 08:40:07 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-02-03 08:40:07 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2022-02-03 08:40:07 +01:00

Sorry for late answer, do you still have this issue?

This could be bug in GPU driver same as #86778, but I have noticed messages "failed to draw waveforms" which I have never seen before.

To check, please download latest alpha build from https://builder.blender.org/download/daily/ click on File > Defaults > Load Factory Settings, Open your file and check if performance gets worse.
If it does, repeatsteps above but disable waveforms as soon as you can and check performance again.

If it still happens, Open Preferences > Interface and enable Developer Extras, then repeat steps above, and as soon as you can, in VSE timeline open cache tab, and uncheck everything. Then play video for 30s or something like that and check memory usage. It should remain about the same +/- 200MB. If it increase more than 1GB, this would probably mean, that it's same issue as with #86778

Sorry for late answer, do you still have this issue? This could be bug in GPU driver same as #86778, but I have noticed messages "failed to draw waveforms" which I have never seen before. To check, please download latest alpha build from https://builder.blender.org/download/daily/ click on File > Defaults > Load Factory Settings, Open your file and check if performance gets worse. If it does, repeatsteps above but disable waveforms as soon as you can and check performance again. If it still happens, Open Preferences > Interface and enable Developer Extras, then repeat steps above, and as soon as you can, in VSE timeline open cache tab, and uncheck everything. Then play video for 30s or something like that and check memory usage. It should remain about the same +/- 200MB. If it increase more than 1GB, this would probably mean, that it's same issue as with #86778

Franklyn Afeso commented

2022-02-03 14:06:10 +01:00

Thanks, I'll Try the suggestions out, and yes, its a similar thing with this task https://developer.blender.org/T86778, but I first noticed it in the VSE.

Richard Antalik commented

2022-04-12 21:05:59 +02:00

Closed as duplicate of #86778

Richard Antalik closed this issue

2022-04-12 21:05:59 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Declining Performance while editing in the Video Sequence Editor #94020