Video sequencer stereoscopic strips produce garbage results #71546

New Issue

Olli Rajala · 2019-11-13T16:21:26+01:00

Olli Rajala commented

2019-11-13 16:21:26 +01:00

System Information
Operating system: Linux-4.4.0-144-generic-x86_64-with-debian-jessie-sid 64 Bits
Graphics card: GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 384.183

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449
Worked: (optional)

Short description of error
Any type of stereoscopic movie or image strips produces garbage results in the viewer in every stereo view mode. This seems to work in 2.79 but broken in all 2.80, 2.81 and 2.82.

EDIT: just noticed that this issue goes away if the scene resolution matches the input clip's resolution (1280x720 in this case). In 2.79 all non-matching resolutions work too.

Exact steps for others to reproduce the error

enable scene stereoscopy
add the attached top-bottom movie to sequencer and set the strip's source parameters as in the attached image
marvel the results in the preview viewer

Tnx'n'cheers!

stereotest.mov

**System Information** Operating system: Linux-4.4.0-144-generic-x86_64-with-debian-jessie-sid 64 Bits Graphics card: GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 384.183 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` Worked: (optional) **Short description of error** Any type of stereoscopic movie or image strips produces garbage results in the viewer in every stereo view mode. This seems to work in 2.79 but broken in all 2.80, 2.81 and 2.82. EDIT: just noticed that this issue goes away if the scene resolution matches the input clip's resolution (1280x720 in this case). In 2.79 all non-matching resolutions work too. **Exact steps for others to reproduce the error** 1) enable scene stereoscopy 2) add the attached top-bottom movie to sequencer and set the strip's source parameters as in the attached image 3) marvel the results in the preview viewer Tnx'n'cheers! [stereotest.mov](https://archive.blender.org/developer/F8061298/stereotest.mov) ![stereo_garbage.png](https://archive.blender.org/developer/F8061300/stereo_garbage.png)

Olli Rajala commented

2019-11-13 16:21:26 +01:00

Added subscriber: @olliRJL

Dalai Felinto commented

2019-11-14 15:24:43 +01:00

Added subscriber: @dfelinto

Dalai Felinto commented

2019-11-14 15:24:43 +01:00

Please attach a simple small sample file, and a 2.79 .blend where I can see that things work, and open in 2.81 (from daily builds in builder.blender.org) where things fail.

Olli Rajala commented

2019-11-17 19:50:57 +01:00

Hi Dalai,

I noticed a bit of different behaviour between all 2.79, 2.80 and 2.81 so here are 3 .blends made with each version... and also this table how they behave when opened in other versions.

Create scene in:	Sequencer Preview	Render Image	Render Animation
2.79	OK	OK	OK
2.80	BAD	BAD	BAD
2.81	OK	BAD	BAD

Open made_with_279.blend in:	Sequencer Preview	Render Image	Render Animation
2.79	OK	OK	OK
2.80	OK	BAD	BAD
2.81	OK	BAD	BAD

Open made_with_280.blend in:	Sequencer Preview	Render Image	Render Animation
2.80	BAD	BAD	BAD
2.81	BAD	BAD	BAD

Open made_with_281.blend in:	Sequencer Preview	Render Image	Render Animation
2.80	OK	BAD	BAD
2.81	OK	BAD	BAD

...and the file:
blender_stereo_test.zip

Cheers!

Hi Dalai, I noticed a bit of different behaviour between all 2.79, 2.80 and 2.81 so here are 3 .blends made with each version... and also this table how they behave when opened in other versions. |Create scene in:| Sequencer Preview| Render Image| Render Animation| | -- | -- | -- | -- | |2.79| OK| OK| OK| |2.80| BAD| BAD| BAD| |2.81| OK| BAD| BAD| |Open made_with_279.blend in:| Sequencer Preview| Render Image| Render Animation| | -- | -- | -- | -- | |2.79| OK| OK| OK| |2.80| OK| BAD| BAD| |2.81| OK| BAD| BAD| |Open made_with_280.blend in:| Sequencer Preview| Render Image| Render Animation| | -- | -- | -- | -- | |2.80| BAD| BAD| BAD| |2.81| BAD| BAD| BAD| |Open made_with_281.blend in: | Sequencer Preview| Render Image| Render Animation| | -- | -- | -- | -- | |2.80| OK| BAD| BAD| |2.81| OK| BAD| BAD| ...and the file: [blender_stereo_test.zip](https://archive.blender.org/developer/F8120304/blender_stereo_test.zip) Cheers!

Richard Antalik commented

2019-12-02 01:11:57 +01:00

Added subscriber: @iss

Richard Antalik commented

2019-12-02 01:11:57 +01:00

This crashes in my case, but I can see where the issue is.

gabriel montagné commented

2020-01-24 23:51:27 +01:00

Added subscriber: @GabrielMontagne

gabriel montagné commented

2020-01-24 23:58:51 +01:00

I stumbled upon this as well. In my case, when I render a stereo preview of the garbled image I can see that the right channel looks as if the pixels were laid out from wrong dimensions, the left channel looks fine.

Strangely, when I "scrub" by clicking and dragging on the strip, the anaglyph preview looks correct.

I'm attaching a screenshot where you can see on the right the preview of the right channel -- on the left the VSE choking.

On the second image, the same setup, I'm just holding down the mouse on the VSE strip,

I also tried, with the same files, on 2.79 (the last build) and I couldn't reproduce the problem.

I stumbled upon this as well. In my case, when I render a stereo preview of the garbled image I can see that the right channel looks as if the pixels were laid out from wrong dimensions, the left channel looks fine. Strangely, when I "scrub" by clicking and dragging on the strip, the anaglyph preview looks correct. I'm attaching a screenshot where you can see on the right the preview of the right channel -- on the left the VSE choking. ![2020-01-24-225611_1920x1080_scrot.png](https://archive.blender.org/developer/F8300242/2020-01-24-225611_1920x1080_scrot.png) On the second image, the same setup, I'm just holding down the mouse on the VSE strip, ![2020-01-24-230457_801x917_scrot.png](https://archive.blender.org/developer/F8300258/2020-01-24-230457_801x917_scrot.png) --- I also tried, with the same files, on 2.79 (the last build) and I couldn't reproduce the problem.

blender-admin commented

2020-04-09 21:00:11 +02:00

This issue was referenced by 9c5b054206

This issue was referenced by 9c5b0542069bfec5ba8bfa65fa031014d3750cbe

Dalai Felinto commented

2020-04-10 12:49:14 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Dalai Felinto closed this issue

2020-04-10 12:49:14 +02:00

Dalai Felinto self-assigned this 2020-04-10 12:49:14 +02:00

gabriel montagné commented

2020-06-04 22:54:09 +02:00

Hi, today I was playing again with stereo footage, and found out that the VSE no longer renders stereo strips and that we have to render to see the effect.

Was that the fix? I would've hoped to still be able to "Show Stereo" on the VSE preview, not only on rendered outputs.

Please see the attached image on which we can see my setup: a stereo image sequence that can be rendered into anaglyph (for example) but cannot be previewed as analglyph even when the camera or the image editor does show it.

I'm using blender v2.83.0

Hi, today I was playing again with stereo footage, and found out that the VSE no longer renders stereo strips and that we have to render to see the effect. Was that the fix? I would've hoped to still be able to "Show Stereo" on the VSE preview, not only on rendered outputs. Please see the attached image on which we can see my setup: a stereo image sequence that can be rendered into anaglyph (for example) but cannot be previewed as analglyph even when the camera or the image editor does show it. ![2020-06-04-214815_1791x985_scrot.png](https://archive.blender.org/developer/F8577597/2020-06-04-214815_1791x985_scrot.png) I'm using blender v2.83.0

Richard Antalik commented

2020-06-05 09:45:13 +02:00

In #71546#945302, @GabrielMontagne wrote:
Hi, today I was playing again with stereo footage, and found out that the VSE no longer renders stereo strips and that we have to render to see the effect.

Was that the fix? I would've hoped to still be able to "Show Stereo" on the VSE preview, not only on rendered outputs.

Please see the attached image on which we can see my setup: a stereo image sequence that can be rendered into anaglyph (for example) but cannot be previewed as analglyph even when the camera or the image editor does show it.

I'm using blender v2.83.0

I have recently tested stereo and also found out that it is not displayed in preview, but quite quickly forgot about it.

Can you please submit new bug report for this?

> In #71546#945302, @GabrielMontagne wrote: > Hi, today I was playing again with stereo footage, and found out that the VSE no longer renders stereo strips and that we have to render to see the effect. > > Was that the fix? I would've hoped to still be able to "Show Stereo" on the VSE preview, not only on rendered outputs. > > Please see the attached image on which we can see my setup: a stereo image sequence that can be rendered into anaglyph (for example) but cannot be previewed as analglyph even when the camera or the image editor does show it. > > ![2020-06-04-214815_1791x985_scrot.png](https://archive.blender.org/developer/F8577597/2020-06-04-214815_1791x985_scrot.png) > > I'm using blender v2.83.0 I have recently tested stereo and also found out that it is not displayed in preview, but quite quickly forgot about it. Can you please submit new bug report for this?

Dalai Felinto commented

2020-06-05 09:48:44 +02:00

@GabrielMontagne the lack of stereo preview is a different matter altogether. A bug (probably reported? Not sure).

gabriel montagné commented

2020-06-07 10:30:10 +02:00

Thanks, @dfelinto @iss, for checking this out.
I couldn't find a report for this so I've added my own,

https://developer.blender.org/T77564

HTH.

Thanks, @dfelinto @iss, for checking this out. I couldn't find a report for this so I've added my own, https://developer.blender.org/T77564 HTH.

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Video sequencer stereoscopic strips produce garbage results #71546