strange gamma problem - please help!

flammsy

flammsy

Active member
hey,
i have a strange problem with final cut. :embarasse i hope that you can help me.

everything looks right in the canvas in final cut. but if i output a self contained quicktime file and play it with quicktime the result is way too bright.

now... very strange... if i import this file in compressor everything in the preview looks right again. and the final m2v file looks also right in the preview window of dvdstudiopro. then i burn it with dvdstudiopro and the final dvd is as bright as the self contained quicktime file. on the tv and computer screen. played back on the computer screen side by side...so no calibration issue.

please help. :embarasse

(left screen is the self contained quicktime file from final cut which looks like the final dvd
right screen is a with sorensen video 3 compressed mov which looks like the image in the canvas)

bild10px3.jpg


bild12zu3.jpg


bild11ls6.jpg
 
Last edited:
This has been a known issue, quicktime and gamma.
One thing I tried, and you can probably too, is add about 1.33 gamma (or so) and it should come out about the same. I'm not saying you should have to do this, but it might be a solution. Try it out.
 
RE1000 said:
This has been a known issue, quicktime and gamma.
One thing I tried, and you can probably too, is add about 1.33 gamma (or so) and it should come out about the same. I'm not saying you should have to do this, but it might be a solution. Try it out.
Click to expand...

a known issue?
i thought there was only a known issue with bright h.264 files?!
 
so there is no way to make a dvd with fcp, compressor and dvdsp that has the gamma as seen in final cut canvas? that can not be true....

please help. :crybaby:
 
Just checking on something.

When you are editing and doing CC, are you monitoring your footage on a regular tv set? This may help you make adjustments so that you can have a more accurate handle on what your final output will look like. I know that the colors and contrasts and gammas will pretty much always look different on your final output than they will on your compositing monitor.

But maybe you have already been doing this...

-Caleb
 
Looking at the other postings on this, it seems like its more of a playback issue than an encoding issue. Something quirky w/ QT and playback. Peoplel who have viewed the same file in QT/Safari have had the gamma issue, but a clean look in FF. So before entirely writing off the encoded files, I'd make the DVD and play it back on a calibrated broadcast monitor and see there if it holds up or not. Good luck.

cheers.
 
VaricamLife said:
Looking at the other postings on this, it seems like its more of a playback issue than an encoding issue. Something quirky w/ QT and playback. Peoplel who have viewed the same file in QT/Safari have had the gamma issue, but a clean look in FF. So before entirely writing off the encoded files, I'd make the DVD and play it back on a calibrated broadcast monitor and see there if it holds up or not. Good luck.

cheers.
Click to expand...

thanks for your help but now i am very confused.
i just discovered that if i open the vts.vob from the final dvd in qt everything looks right again (like in fcp canvas) whereas vlc, apple dvd player and my dvd player @ tv show wrong gamma. :huh:

bild3ii3.jpg
 
I wouldn't trust a TV set for the correct gamma (or really any of the other devices you mentioned). This is why you want a properly calibrated broadcast monitor. Author the DVD and check it on that. Then if the gamma is holding up okay there, that's all you can do. TV sets are always a bit different, and well at a person's home can be horribly off. If you can ensure that it looks within reason on a calibrated broadcast monitor then you've done your job. After that, its up to each household to simply make their TV sets as good as can be (but still might not be perfect).

cheers.
 
i think i finally found the problem.

http://docs.info.apple.com/article.html?artnum=93794

my monitor is set to gamma 2.2 but final cut thinks that it is set to 1.8 mac standart and therefore final cut preview shows it darker to give a preview of what it should look like on a 2.2 tv. but because my monitor is set to 2.2 tv gamma final cut shows it darker than it really is, forcing me to add 1.2 gamma in the end to achieve the same gamma on the tv.

so i think i have to change my gamma now everytime i open final cut. :undecided
surfing web -> 2.2
final cut -> 1.8
 
so do you all have your display set to 1.8 gamma and change it everytime you are not using final cut? and is there an option to disable this stupid gamma change that final cut canvas is doing.
 
jihaaaa... i am sooooo happy... :)

i changed the gamma correction in playback menue (system settings) from precise to approximation and now the canvas window looks exactly like the final dvd in vlc.

now i can work with 2.2 gamma in final cut. :thumbsup:
 
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