jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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2QTVR Quality setting problem.
Posted: 12 Aug 2008 at 1:22 GMT
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I have the free version of this software that allows you to use the cubic convertor to which I then export the tiles to FPP for publishing.
For the life of me I cannot figure out the quality meter setting. No matter what level I put it, 90, 80, 70 it spits out 6 cubes with the same amount of total KB. In short, it doesn't seem to be compressing. What an I missing here guys? I've been trying to figure this out for 2 hours.
FYI, I am converting 6000X3000. I set the tile size to 1500, correct? When saving as jpeg the quality slider does not change the output size. I was under the impression that I could get a 2mb file from a 6K X 3K pano with decent quality, probably set around 60-70%. Right now it giving me something close to 5-6mb, REGARDLESS of where I set the slider.
Thank you
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jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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Re: 2QTVR Quality setting problem.
Posted: 12 Aug 2008 at 19:46 GMT
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Any thoughts to this guys? Should I uninstall then, reinstall? There is no reason that I can think of that would cause the image file to be non affected by the quality slider.
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ebig
Posts: 159
Location: Haiku, Maui, Hawaii, United States
Registered: 21 May 2007
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Re: 2QTVR Quality setting problem.
Posted: 13 Aug 2008 at 3:39 GMT
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I take it you are converting FROM a single 6000x3000 image TO 6 jpeg cube faces with a tile size of 1501 with compression set to say, 70%?
In this case, each cube face file should be under 200k for a total of under 1mB.
Regards,
Ed
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jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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Re: 2QTVR Quality setting problem.
Posted: 13 Aug 2008 at 4:08 GMT
updated: 13 Aug 2008 at 4:09 GMT
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That is correct Ed. Problem is, when it spits out the 6 cubes they average over an 1MB a piece. No matter where I set the quality slider the 6 cube file sizes are uneffected and remain over 1mb a piece on average.
This is my concern, why is it doing this?
Edit: original tiff is around 74mbs.
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ebig
Posts: 159
Location: Haiku, Maui, Hawaii, United States
Registered: 21 May 2007
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Re: 2QTVR Quality setting problem.
Posted: 13 Aug 2008 at 7:38 GMT
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Hmmm. Well, here's my process.
Starting with a 6000x3000 equirectangular image around 53mB.
Using Pano2QTVR 1.6.2 Pro.
Under Settings: Tile 1501, 5x5, Quality 70
Under Project: Convert to Cubic, Tile format jpeg, Tile size 1501.
Resulting cubes c. 150kB each. total < 1mB.
Unless you have a different version or some support file is corrupted you should get the same.
Hope that helps.
Regards,
Ed
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jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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Re: 2QTVR Quality setting problem.
Posted: 13 Aug 2008 at 17:14 GMT
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Yeah, still no dice.
Using Ver 1.6.6. It's the free version that doesn't allow you to create the mov file, but since I need it for only cubic tiles it is appropriate. There has to be a corrupt file. That is unless the free version disables the quality (compression) slider, but this doesn't make any sense.
Maybe I'll try uninstalling and reinstalling.
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jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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Re: 2QTVR Quality setting problem.
Posted: 15 Aug 2008 at 18:23 GMT
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Update:
I uninstalled and reinstalled Pano2qtvr 1.6.6. I still am getting no size difference in the output cubic tiles converting the tiff to jpeg.
Workflow
1)Upload the 8 bit tiff pano, 75.5 mb, 6272X3136
2)Under settings, cubic file size -- 1971 (6271x3.142= approx 1971)
3) On 3 quality tests I set the slider to 80%, 70% and 60% respectively.
On all three occasions the 6 cubic tiles came out the exact same in kb, for example, cube_0 =1.35mb at 80%, cube_0 =1.35 at 60%. The rest of the cubes have the same issue, no compression differences.
The only thing I can think of is that the command param that deals with jpeg compression is missing when the program runs. I have made no changes to the commands. I installed the software and used it as default. Does anyone know anything about this?
This HAS to be something simple that I am overlooking and it is driving me bat s*#t!! Please someone help me figure this out. I will paint your house!! 
j
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John Houghton
Posts: 2317
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: 2QTVR Quality setting problem.
Posted: 15 Aug 2008 at 19:25 GMT
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When you generate cubic tiles, there is no quality seting option in the dialog panel. There is a quality setting on the dialog panel for generating a QTVR file (.mov, which has 6 cubic tiles in jpeg format contained within it). So varying the quality setting will vary the .mov file size. As there is no quality control provided when generating cubic tiles, it's not surprising that they always turn out the same size. I assume they are output at maximum quality and are intended for editing purposes, though tif, being lossless, is preferred.
Your arithmetic is suspect! 6272x3.142 is not 1971 as a moment's thought will confirm. It's 19706 approx. But this is not the sum you should be doing anyway. The tile size often recommended is panowidth divided by pi, which is 1996.
John
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jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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Re: 2QTVR Quality setting problem.
Posted: 15 Aug 2008 at 20:46 GMT
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Well, I guess that would explain it then. Yes, my math was off. I wrote X instead of divide. I went back and looked and my tiles were 1996 as you said.
So I guess I should save the cubics as tiffs and individually save them as jpeg in PS so they can be imported into FPP?
There looks to be no way around the extra "save" and the additional loss-ness that ensues.
Thanks for your help
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Hans Nyberg
Posts: 866
Location: Denmark
Registered: 28 Aug 2005
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Re: 2QTVR Quality setting problem.
Posted: 15 Aug 2008 at 23:29 GMT
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I am afraid Pano2QTVR does not have the options for jpg cubefaces.
Pano2VR has it and you can also name the cubefaces in the right way for FPP.
There might be a free cubeface converter for windows.
I believe I seen a link in the FPP Forum.
Hans
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panocanarias
Posts: 35
Location: Tenerife, Canary Islands, Spain
Registered: 22 Oct 2006
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Re: 2QTVR Quality setting problem.
Posted: 16 Aug 2008 at 0:06 GMT
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Hans Nyberg said: .. There might be a free cubeface converter for windows....
.. e.g. Eric Gerd's "Pano2Faces.bat" which is part of his DOS Utilities for Panoramas (DOSUP):
www.pinlady.net/vr/#anchor3
Have a look at Eric's other very usefull tools, too:
www.pinlady.net/vr/
Saludos,
Klaus
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jimmyd
Posts: 72
Location: United States
Registered: 6 Nov 2004
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Re: 2QTVR Quality setting problem.
Posted: 16 Aug 2008 at 3:47 GMT
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Thanks John, Hans, and Klaus.
I downloaded the Pano2faces package. Unless I am wrong I believe this software just converts the pano into 6 cubics of the same file type. There is no way to a) change the type of jpeg or b)compress the file.
I say this only because Pano2qtvr allows you to do the same thing already, i.e standard conversion without compression.
What I am looking to do is go from my finished tiff pano directly to cubics that have been compressed in jpeg. These would then go directly into FPP without futher editing of course.
It appears my only option is to save the cubics as tiff, then save them as jpeg with PS getting them down to their desired file sizes. This of course creates another "save" and thus more quality loss. Unless I am missing something?
J
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John Houghton
Posts: 2317
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: 2QTVR Quality setting problem.
Posted: 16 Aug 2008 at 5:23 GMT
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jimmyd said: It appears my only option is to save the cubics as tiff, then save them as jpeg with PS getting them down to their desired file sizes. This of course creates another "save" and thus more quality loss.
You are only losing quality once - when you save to jpeg. You can save to tiff as many times as you like and it will have no effect on quality.
John
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