Bug 526865

Summary: "display" skips one line when showing multiple images from single file
Product: [Fedora] Fedora Reporter: Piergiorgio Sartor <piergiorgio.sartor>
Component: ImageMagickAssignee: Pavel Alexeev <pahan>
Status: CLOSED UPSTREAM QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: low    
Version: 11CC: hdegoede, nmurray, pahan
Target Milestone: ---   
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Hardware: i586   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2009-10-02 14:07:59 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Test sequence none

Description Piergiorgio Sartor 2009-10-02 07:58:55 UTC 
Description of problem:
We have some raw sequences which contain multiple frames.
"display" from ImageMagick should able to show the single frames, one after the other, but since F-11 it seems to skip the last line, causing the subsequent frames to be displayed each one line up, i.e. the sequence is shifting upwards.

Version-Release number of selected component (if applicable):
ImageMagick-6.5.1.2-1.fc11.i586

How reproducible:
Always

Steps to Reproduce:
1.
display -size 720x480 -depth 8 seq.y
2.
Go to subsequent frames by pressing space.

Actual results:
First frame is OK, second is one line up, third is two lines up and so on.

Expected results:
The frames should be displayed correctly.

Additional info:
ImageMagick from F-10 was working fine, this was version 6.4.0.10-2.
Trying something like "display -size 720x479 -depth 8 seq.y", i.e. one line less than the real picture height, results in correct displaying, but, obviously, with one line missing.
Before someone asks, the sequences we use are really 720x480.

Thanks a lot in advance,

piergiorgio
Comment 1 Pavel Alexeev 2009-10-02 08:21:09 UTC 
Hello. Thank you for bugreport.

Please, try new version build - http://koji.fedoraproject.org/koji/buildinfo?buildID=125384

If error still here, we continue investigation.
Comment 2 Piergiorgio Sartor 2009-10-02 08:46:31 UTC 
Hi, thanks for the quick answer.

Actually, in the meantime, I tried version 6.5.6 from upstream.

This version fixes partially the issue.

Now all *.gray files work fine, but *.y do not. Before, *.gray were faulty too.

Interesting enough, something like "display -size 720x576 -depth 8 gray:seq.y" works also fine.

Hope this helps.

Thanks again,

pg
Comment 3 Pavel Alexeev 2009-10-02 08:55:35 UTC 
(In reply to comment #2)
> Actually, in the meantime, I tried version 6.5.6 from upstream.
> 
> This version fixes partially the issue.
I think it is only upstream issue and should be filled them. Please can you do that? Otherwise I should do it.

And additionally, please, can you attach example files on what I can reproduce error?
Comment 4 Piergiorgio Sartor 2009-10-02 09:33:09 UTC 
(In reply to comment #3)
[...]
> I think it is only upstream issue and should be filled them. Please can you do
> that? Otherwise I should do it.

I think so too, it is an upstream issue.

Well, I guess you've already an account on their bug report system, so, maybe, it would be easier if you do it.
If this is a problem, of course I can do it.

> And additionally, please, can you attach example files on what I can reproduce
> error?  

Actually, one issue is that these files are quite huge, above 10MB.
I'll try to produce a file with only few frames, 3~4 should be OK to see the issue, and bzip2 it.
I need to know what's the limit for the attachments here, so I can check beforehand if it will fit or not.

Thanks again,

pg
Comment 5 Pavel Alexeev 2009-10-02 09:41:46 UTC 
Ok, I email to upstream.

I do not known about attachment limitation. I think you should just try.
Comment 6 Piergiorgio Sartor 2009-10-02 09:53:13 UTC 
Created attachment 363451 [details]
Test sequence

This is a luminance only file, 5 frames, 720x576 resolution, about 2Mb unzipped.

Use:

bunzip2 Mobile_and_Calendar.y.bz2
display -size 720x576 -depth 8 Mobile_and_Calendar.y

Press space to go to successive frames to notice the upwards shift of the picture.

In case of problems, please let me know.

pg
Comment 7 Pavel Alexeev 2009-10-02 14:07:59 UTC 
I receive answer from upstream:

We can reproduce the problem and have a patch.  It will be available in
ImageMagick 6.5.6-8 Beta and the Subversion trunk by sometime tomorrow.
Thanks.


So, close it as UPSTREAM.