Splitting strips will change image output #92625

New Issue

Marius · 2021-10-29T20:45:34+02:00

Marius commented

2021-10-29 20:45:34 +02:00

System Information
Operating system: Windows 8
Graphics card: 550Ti

Blender Version
Broken: 2.93.0 Beta
Worked: Not sure

Short description of error
Splitting strips with "hard" method will change image output.

Exact steps for others to reproduce the error
Add movie or image sequence to VSE
Split strip by pressing Shift + K

Image will change

**System Information** Operating system: Windows 8 Graphics card: 550Ti Blender Version Broken: 2.93.0 Beta Worked: Not sure **Short description of error** Splitting strips with "hard" method will change image output. **Exact steps for others to reproduce the error** Add movie or image sequence to VSE Split strip by pressing Shift + K Image will change

Marius commented

2021-10-29 20:45:34 +02:00

Added subscriber: @MariusVOA

Richard Antalik commented

2021-11-22 08:14:00 +01:00

Added subscriber: @iss

Richard Antalik commented

2021-11-22 08:14:00 +01:00

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

Richard Antalik commented

2021-11-22 08:14:00 +01:00

I can't reproduce this issue. I can see that pressing ctrl+r wipes all cached images. Issue could possibly happen if you have disk cache enabled, Check if that is the case in Preferences > System > Video Sequencer.

Also please check if this happens with latest alpha build from https://builder.blender.org/download/daily/
If there are problems in alpha please clarify steps to reproduce.

I can't reproduce this issue. I can see that pressing ctrl+r wipes all cached images. Issue could possibly happen if you have disk cache enabled, Check if that is the case in Preferences > System > Video Sequencer. Also please check if this happens with latest alpha build from https://builder.blender.org/download/daily/ If there are problems in alpha please clarify steps to reproduce.

Marius commented

2021-11-22 11:16:05 +01:00

In #92625#1257584, @iss wrote:
I can't reproduce this issue. I can see that pressing ctrl+r wipes all cached images. Issue could possibly happen if you have disk cache enabled, Check if that is the case in Preferences > System > Video Sequencer.

Also please check if this happens with latest alpha build from https://builder.blender.org/download/daily/
If there are problems in alpha please clarify steps to reproduce.

That is exactly the situation. The disk cache doesn't clear on close (I noticed in a recent edit that if I manually go and delete the specific project's frames, it's fresh), so it seems to hold the frames (even after close) and refuses to change except under a few circumstances (like adding a new image or video strip over everything) - even when you render and change info (like replacing an image source) it still holds the old frames. I'll try it in the new alpha as well to confirm.

> In #92625#1257584, @iss wrote: > I can't reproduce this issue. I can see that pressing ctrl+r wipes all cached images. Issue could possibly happen if you have disk cache enabled, Check if that is the case in Preferences > System > Video Sequencer. > > Also please check if this happens with latest alpha build from https://builder.blender.org/download/daily/ > If there are problems in alpha please clarify steps to reproduce. That is exactly the situation. The disk cache doesn't clear on close (I noticed in a recent edit that if I manually go and delete the specific project's frames, it's fresh), so it seems to hold the frames (even after close) and refuses to change except under a few circumstances (like adding a new image or video strip over everything) - even when you render and change info (like replacing an image source) it still holds the old frames. I'll try it in the new alpha as well to confirm.

Marius commented

2021-11-23 04:49:08 +01:00

Unfortunately, I can't test it with alpha...

"The program can't start because api-ms-win-shcore-scaling-l1-1-1.dll is missing from your computer. Try reinstalling the program to fix this problem"

But, you can enable the disk cache and set playback mode to play every frame after importing a sequence or a proper length image sequence, say 250 frames+. Then play it through to cache the frames, now replace those frames (not delete, but replace) and it should be stuck even into the render (this happened with my most recent edit that's not uploaded yet). This sticking sometimes happens even if you move the sequence around. Primarily this happens if it only cached some frames of that sequence, then the fresher frames show up to flicker between the old ones. You might be finding it hard to reproduce because you may have a much better setup than me (which is not hard, LOL).

I think for now, I'll just disable disk cache, because it makes my edits and final renders unreliable; blender is my only video editor, for reference:
https://www.youtube.com/watch?v=rw140iTIq8Q

If you need more info, let me know!

Unfortunately, I can't test it with alpha... "The program can't start because api-ms-win-shcore-scaling-l1-1-1.dll is missing from your computer. Try reinstalling the program to fix this problem" But, you can enable the disk cache and set playback mode to play every frame after importing a sequence or a proper length image sequence, say 250 frames+. Then play it through to cache the frames, now replace those frames (not delete, but replace) and it should be stuck even into the render (this happened with my most recent edit that's not uploaded yet). This sticking sometimes happens even if you move the sequence around. Primarily this happens if it only cached some frames of that sequence, then the fresher frames show up to flicker between the old ones. You might be finding it hard to reproduce because you may have a much better setup than me (which is not hard, LOL). I think for now, I'll just disable disk cache, because it makes my edits and final renders unreliable; blender is my only video editor, for reference: https://www.youtube.com/watch?v=rw140iTIq8Q If you need more info, let me know!

Richard Antalik commented

2021-11-23 07:41:25 +01:00

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

Richard Antalik commented

2021-11-23 07:41:25 +01:00

Right, so I understand it as you did use disk cache, then that is likely suspect. Disk cache doesn't support overwriting data, only write in sequence. I will try to reproduce the issue with disk cache then.

Marius commented

2021-11-23 09:37:36 +01:00

In #92625#1258404, @iss wrote:
Disk cache doesn't support overwriting data, only write in sequence.

Perfect description of the problem, lol. Thank you!

> In #92625#1258404, @iss wrote: > Disk cache doesn't support overwriting data, only write in sequence. Perfect description of the problem, lol. Thank you!

Richard Antalik commented

2021-11-29 08:18:05 +01:00

I can reproduce issue, but this seems to be because splitting with shift+K does change strip output image, which shouldn't happen. After "refresh" image is OK, but refresh doesn't wipe disk cache.

Richard Antalik changed title from ~~VSE: "Refresh All" does nothing on image sequences~~ to Splitting strips will change image output

2021-11-29 08:20:32 +01:00

Richard Antalik commented

2021-11-29 08:20:32 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Marius commented

2021-11-29 08:26:57 +01:00

In #92625#1261494, @iss wrote:
I can reproduce issue, but this seems to be because splitting with shift+K does change strip output image, which shouldn't happen. After "refresh" image is OK, but refresh doesn't wipe disk cache.

And that is part of the issue. Because the cache doesn't update or change, it holds those frames and renders what it held, not edited. I also can't go around Shift+K'ing everything to try and get a new result, LOL.

For the moment, I'll turn it off. Use this to remind me after Blender 3 comes out (or commits) and I'll be happy to see if it still does the same thing!
Always happy to help!

Thank you! :D

> In #92625#1261494, @iss wrote: > I can reproduce issue, but this seems to be because splitting with shift+K does change strip output image, which shouldn't happen. After "refresh" image is OK, but refresh doesn't wipe disk cache. And that is part of the issue. Because the cache doesn't update or change, it holds those frames and renders what it held, not edited. I also can't go around Shift+K'ing everything to try and get a new result, LOL. For the moment, I'll turn it off. Use this to remind me after Blender 3 comes out (or commits) and I'll be happy to see if it still does the same thing! Always happy to help! Thank you! :D

Philipp Oeser removed the

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Splitting strips will change image output #92625