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Maniphest T46223

Open EXR multiview image sequences crash Blender 2.75a and 2.76rc
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Description

Demonstration files

open_exr_multiview_sequence.zip45 MBDownload

System Information
Ubuntu Linux 14.04
NVIDIA GTX 660ti

Blender Version
Broken: 2.75a c27589e and 2.76-rc1 c586e30

Short description of error
Blender 2.75a writes multiview Open EXR files in sequences which is a great feature.
However, when importing the Open EXR image sequence into the compositor, blender throws
and error "error, multi is a normal image", and soon after it core dumps.

At first the first frame image may show, however it core dumps or halts immediately after
changing frame on the time-line.

Core dump:
"error, multi is normal image
Writing: /tmp/open_exr_multiview_sequence.crash.txt
Segmentation fault (core dumped)"

Exact steps for others to reproduce the error
Attached blend file and 3 OpenEXR images with Left and Right view demonstrate this bug.
To reproduce the error, 1. open up compositor 2. add image node 3. open up the open exr image sequence 4. change frame on timeline,
blender should then immediately halt or core dump.

Revisions and Commits

rB Blender
D1549rB8191066c0b6d Fix T46223: multiview image sequences crashing.

Related Objects

Event Timeline

Hrobjartur Thorsteinsson (Hrobjartur) created this task.Sep 23 2015, 11:32 AM
Hrobjartur Thorsteinsson (Hrobjartur) assigned this task to Dalai Felinto (dfelinto).
Hrobjartur Thorsteinsson (Hrobjartur) raised the priority of this task from to 90.
Hrobjartur Thorsteinsson (Hrobjartur) updated the task description. (Show Details)
Hrobjartur Thorsteinsson (Hrobjartur) added a project: BF Blender.
Hrobjartur Thorsteinsson (Hrobjartur) edited a custom field.
Hrobjartur Thorsteinsson (Hrobjartur) added a subscriber: Hrobjartur Thorsteinsson (Hrobjartur).
Hrobjartur Thorsteinsson (Hrobjartur) added a comment.Sep 24 2015, 6:17 AM

splitLeftRightEXR.py1 KBDownload

Here is a temporary workaround for those with this issue.

I wrote a small python script two split a left-right multiView file into two separate files using the OpenEXR python binding found here http://www.excamera.com/sphinx/articles-openexr.html
It needs a relatively new libopenexr so that it doesn't complain about multiViews, possibly just download the
latest v.2.2 from openexr.com

On Linux just run the python script on your L-R multiview OpenEXR files, $ ./splitLeftRightEXR.py <myfile>
it will then output two new files with L_ and R_ prefix.
For a large file sequence do $ for x in myfilesequence*.exr; do ./splitLeftRightEXR.py $x; done

Sergey Sharybin (sergey) lowered the priority of this task from 90 to Normal.Sep 24 2015, 10:37 AM
Sergey Sharybin (sergey) added a subscriber: Sergey Sharybin (sergey).

Can confirm the crash. Not really sure if it's directly multiview related, similar issue appeared with pre-multiview blender but those i've tried to keep resolved.

@Dalai Felinto (dfelinto), it'll help if you can look if it's multiview related or not and if not feel free to re-assign to me.

Dalai Felinto (dfelinto) added a comment.Sep 24 2015, 8:19 PM

I think it is multiview related. Something is wrong with the sequence logic for exr multiview files.

Brecht Van Lommel (brecht) added a revision: D1549: Fix T46223: multiview image sequences crashing..Oct 11 2015, 3:34 AM
Brecht Van Lommel (brecht) changed the task status from Unknown Status to Resolved by committing rB8191066c0b6d: Fix T46223: multiview image sequences crashing..Oct 15 2015, 2:03 AM
Brecht Van Lommel (brecht) added a commit: rB8191066c0b6d: Fix T46223: multiview image sequences crashing..
Brecht Van Lommel (brecht) mentioned this in rB12c705ec86b6: Fix related to T46223: memory leak when loading multilayer multiview images..
Campbell Barton (campbellbarton) mentioned this in rBe5ee9d1eff7e: Fix related to T46223: memory leak when loading multilayer multiview images..Oct 29 2015, 11:39 AM