[Bf-funboard] Dynamic scaling Render Res for VSE playback

Antony Riakiotakis kalast at gmail.com
Wed Feb 11 09:55:00 CET 2015

We have that in gooseberry and it works, but all effects misbehave.
Current effect framework assumes that all input buffers have the same
dimensions. We could use some sort of filtering instead - bilinear or
even no filtering (take the nearest texel), but quality would degrade.
Also I am just not certain if doing bilinear filtering would improve
or decrease the performance. More tests are needed here. Alternative
is to do all effect processing on GPU, where filtering comes for free,
but that's an even bigger change.

On 11 February 2015 at 05:11, David McSween <3pointedit at gmail.com> wrote:
> I think we need better real time playback in VSE when system resources are
> stretched.
> Today I was adding a title from 3D view over a video in the VSE.
> At 100% render resolution I saw 30 fps playback, but this dropped to 4 fps
> when I struck the 3D title.
> The VSE preview shows the current FPS (differing from scene setting) so
> Blender knows when to drop frames for playback.
> Next I scaled the percentage of render resolution to 25% (arbitrary value)
> and played the shot with 3D, I saw 30 fps again.
> Could we add to the Playback menu (currently - AV Sync, Frame Dropping, No
> Sync) Render Scaling ?
> Eg. When frame dropping is sensed drop Render Resolution to predetermined
> minimum value, and scale preview to fill same space as before (zoom the 25%
> render res up to 100% render res display size).
> This would retain real time animation preview which is better for animation
> sync. I would expect to still drop frames but be more efficient with the
> display buffer.
> Cheers
> David McSween.
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