VSE: AV-Sync causes caching to fail #58000

New Issue

Francesco Siddi · 2018-11-22T15:11:23+01:00

Francesco Siddi commented

2018-11-22 15:11:23 +01:00

System Information
Ubuntu Linux, GTX 1080

Blender Version
Broken: Blender 2.8, 2.79b

Exact steps for others to reproduce the error
How to reproduce:

Load a clip in the VSE
Set playback method to AV-Sync
The sequence will not be cached and will not play at the target frame rate.

Setting playback to No Sync makes caching work.

**System Information** Ubuntu Linux, GTX 1080 **Blender Version** Broken: Blender 2.8, 2.79b **Exact steps for others to reproduce the error** How to reproduce: - Load a clip in the VSE - Set playback method to AV-Sync - The sequence will not be cached and will not play at the target frame rate. Setting playback to No Sync makes caching work.

Francesco Siddi commented

2018-11-22 15:11:23 +01:00

Added subscriber: @fsiddi

Francesco Siddi commented

2018-11-22 15:11:43 +01:00

Added subscriber: @Hjalti

William Reynish commented

2018-11-22 15:16:47 +01:00

Added subscriber: @WilliamReynish

William Reynish commented

2018-11-22 15:16:47 +01:00

Physics caching also doesn't work with this option. It seems like caching in general doesn't work with AV Sync.

Richard Antalik commented

2019-02-23 23:09:09 +01:00

Added subscriber: @iss

Richard Antalik commented

2019-02-23 23:09:09 +01:00

Changed status from 'Open' to: 'Archived'

Richard Antalik closed this issue

2019-02-23 23:09:09 +01:00

Richard Antalik self-assigned this 2019-02-23 23:09:09 +01:00

Richard Antalik commented

2019-02-23 23:09:09 +01:00

I can not confirm this.

With A/V sync enabled, frames are skipped and therefore there are "holes" in the cache. You would have to play section several times to be fully cached.

D3934: VSE cache with frame prefetching (WIP) will make it easier to fill the cache in advance + actually see the cache.

This is not a bug.

Only way around this, is threaded significantly faster rendering and preview drawing.
Prefetching is threaded rendering, so it's just a partial solution.

I can not confirm this. With A/V sync enabled, frames are skipped and therefore there are "holes" in the cache. You would have to play section several times to be fully cached. [D3934: VSE cache with frame prefetching (WIP)](https://archive.blender.org/developer/D3934) will make it easier to fill the cache in advance + actually see the cache. This is not a bug. Only way around this, is threaded significantly faster rendering and preview drawing. Prefetching is threaded rendering, so it's just a partial solution.

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