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IDProjectCategoryView StatusDate SubmittedLast Update
0000171DCP-o-maticBugspublic2013-07-03 23:532015-12-03 21:19
Reportercarl Assigned Tocarl  
PriorityurgentSeveritymajorReproducibilityhave not tried
Status closedResolutionfixed 
Target Version1.x 
Summary0000171: Blu-ray conversion too bright
Description

For now, I did some snapshots to document the issue. I also made some tests with still images, and will also add another BluRay rip with test images.

These snapshots show the issue very clearly, as I said, it's not subtle:

This is a VLC grab of the source MKV video, directly ripped from the BluRay, no processing:

https://dl.dropboxusercontent.com/u/5582554/dvdomatic/mkv_snapshot_vlc.jpg

This is a screen grab of the DVD-o-matic preview window:

https://dl.dropboxusercontent.com/u/5582554/dvdomatic/dvdomatic_snapshot.jpg

This is a VLC grab of the MXF file that DVD-o-matic created (no inverse xyz, so there is also a greenish colour shift):

https://dl.dropboxusercontent.com/u/5582554/dvdomatic/dcp_snapshot_vlc.jpg

This is a screen grab of Stereoscopic Player, same DCP/MXF file (with inverse xyz):

https://dl.dropboxusercontent.com/u/5582554/dvdomatic/dcp_snapshot_stereoscopic.jpg

This is a scene from the BluRay-DCP conversion I actually played over the Sony, and where the noisy, green shadow in the lower part came to my attention first.

TagsNo tags attached.
Attached Files
mkv_snapshot_vlc.jpg (102,642 bytes)   
mkv_snapshot_vlc.jpg (102,642 bytes)   
dvdomatic_snapshot.jpg (179,612 bytes)   
dvdomatic_snapshot.jpg (179,612 bytes)   
dcp_snapshot_vlc.jpg (170,469 bytes)   
dcp_snapshot_vlc.jpg (170,469 bytes)   
dcp_snapshot_stereoscopic.jpg (68,787 bytes)   
dcp_snapshot_stereoscopic.jpg (68,787 bytes)   
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Relationships

related to 0000285 closedcarl Crushed blacks and pulsating background 

Activities

carl

2013-07-03 23:56

administrator   ~0000165

As it happens I have recently been using the inverse of these transforms for conversion in the opposite direction. We had been finding that the resulting RGB images were too dark until I changed the transform slightly (to a simpler gamma curve). This suggests that, perhaps, the current transforms are wrong (and may be inclined to generate overly bright images).

Perhaps we should try the modified transforms in DVD-o-matic and see how that turns out. Your Blu-ray test might be handy here...

carl

2013-12-02 00:54

administrator   ~0000244

Seen by a few people; still not me, and still not sure what is going on.

Markus

2014-01-13 20:35

reporter   ~0000292

Are you using sRGB as standard color conversion ? This has a Gamma of 2.6 I think its too high.
I'm using the rec709 conversion with a gamma of 2.2.

Try this, perhaps it helps.

carl

2014-10-31 20:07

administrator   ~0000406

I'll close this, as it is old and we now have configurable colourspace conversions... anyone feel free to leave a comment if they still see the problem.

Issue History

Date Modified Username Field Change
2013-07-03 23:53 carl New Issue
2013-07-03 23:53 carl File Added: mkv_snapshot_vlc.jpg
2013-07-03 23:53 carl File Added: dvdomatic_snapshot.jpg
2013-07-03 23:54 carl File Added: dcp_snapshot_vlc.jpg
2013-07-03 23:54 carl File Added: dcp_snapshot_stereoscopic.jpg
2013-07-03 23:55 carl cc => Lilian
2013-07-03 23:55 carl Description Updated
2013-07-03 23:56 carl Note Added: 0000165
2013-08-28 20:54 carl Project DVD-o-matic => DCP-o-matic
2013-08-28 21:00 carl Target Version => 1.x
2013-12-01 22:04 carl Category Bugs (back-end) => Bugs
2013-12-02 00:54 carl Note Added: 0000244
2013-12-02 00:54 carl Assigned To => carl
2013-12-02 00:54 carl Status new => confirmed
2013-12-03 15:41 carl Relationship added related to 0000285
2014-01-13 20:35 Markus Note Added: 0000292
2014-10-31 20:07 carl Note Added: 0000406
2014-10-31 20:07 carl Status confirmed => resolved
2014-10-31 20:07 carl Resolution open => fixed
2015-12-03 21:19 carl Status resolved => closed