Color Correction Quality Loss Computational Problem.

I have an entire film finished editing, all color graded etc...
And I recently decided I want to go more conservative with the color palet.
If I simply overlay a color correction over the entire film sequence. Would I lose more quality than I would lose by going back through and readjusting the color balance on every clip?
I guess this is basically a question of how Premier calculates it's color correction. Does it save it's numeric values in a largr than neccessary floating point number or does it have to do rounding at each step?

I think that what Ann is asking is how did you do your color grading, i.e. 3-Way Color Corrector, etc.
Now, I am at a loss as to what you are now asking about. Which Effects are you now thinking about?
If it would be, say Fast Color Corrector, 3-Way, etc., then you might want to Nest your Sequence into another one, and apply that desired Color Correction Effect to the entire Nested Sequence.
Good luck,
Hunt

Similar Messages

Serious problem with a color correction

Ok so here´s the deal....
I have a 83.62 Gb quicktime movie file. It came from a Black and White color corretion made in Scratch and it was delivered to me wit a Uncompressed 32-bit ARGB codec.
I need to work with it on FCP, so i compressed it to Apple Pro Res 422(HQ) and then imported it to final.
While in final cut, a played the commpressed clip on the viewer and .....(HERE´S THE TRICKY PART).....it losses the color correction on the playback, but as soon as i pause it, it recovers the color correction again.
I´ve asked a few friends about it and nobody seems to understand what´s going on. The clip recognizes the color correction ONLY WHILE PAUSED. Not on playback, not even if I play it the Quicktime application. I´m completly lost.
I have a Mac Pro 2x2.4 Ghz Intel Xeon , with a 6 GB 1066 MHz DDR3 ECC memory and a ATI Radeon HD 5770 1024 MB graphics card. With FCP7 running.
I will greatly aprecciate your advice on this one!

Besides the fact that FCP plays videos at low quality for resources sake, I would suggest you export a two second clip (with current settings) and check about colour correction in quick time. If there is a problem convert original again in compressor but this time in the colour tab select the HD 709 colour space. The 709 space manains grading across conversions.
I underlined the 422 and not the 422 HQ but you get the gist...
Message was edited by: hyphen

Contrast/Color Correction render problem

So, on certain clips in my timeline when I apply either the Fast Color Corrector or Levels corrector to increase input black, when it is rendered the top line of pixels blinks black per frame. It's really annoying and looks unprofessional, and I am doing a video for a music client. I have tried replacing the clip, replacing the color correction, and nothing seems to be working. Anyone know what would be causing this?

No - the original video is fine, it only does this when I apply a color correction effect. It's only certain clips too, I don't know if it would in some way be related to sub-clipping. It appears to be sporadic since clips that come from the same source file are fine.
Also no - the computer I am using is relatively new and fast, so I haven't been using anything like that.
I have tried everything from re-subclipping to re-importing the footage. Do you think it's just a general problem with my video card? Because occasinally when I render AVI's I get a frame or two of random static...it's just weird that it is sporadic on the clips, but also consistently present on those ones that are affected. Or maybe it is my general cursed luck with technology.

Color correction problems with multiple monitors

I just upgraded my Win 7 from RC to RTM. I then updated my color correction using Gretag Macbeth i1 for both adapters. My system has 2 video cards and 3 monitors. Monitor 1 runs off adapter 1, monitors 2 & 3 run off adapter 2. Both video cards and all 3 monitors are of the same model. I set adapter/monitor 1 to the ICC profile 1, and adapter 2/monitor 2&3 to ICC profile 2 from Gretag. Not running LR, everything looks as expected.
When I run LR on the primary monitor green leaves turn orange, if I had to guess I would say I'm loosing the green information. If I move LR to display 2 or 3 the colors are as they should be.
I ran into this once before and it was something simple to fix this, but I can't seem to find it now. BTW, this worked just fine before the upgrade from RC to RTM.

At first I thought a reboot cured the problem, but apparently not.

Color correction novice back with a problem/question.

Hi,
I have been working on color correction for an edit of a live 2 camera shoot concert. Edits are almost all final. I dug into correcting color between the 2 cameras & after some practice got good results.
Tho, I noticed that corrections looked slightly different after rendering them, and again slightly different after exporting to full uncompressed quicktime video.
Saturation levels shifted (less), & some shots showed slightly different color balance. This is a unique shoot because the stage was fully lit in red light & red can be one of the most difficult colors in video (in my experience).
So I eventually started that vicious cycle of correcting not by eye but by anticipating what was needed to get a desired result after rendering & exporting... each time it was lengthy renders & exports before seeing the results.
So I had several versions of the project saved w/ different renderings, etc. All of this is stored on a 250 gig 2nd internal drive which I bought & installed just for editing. All files & edit lists etc were kept there.
So I'm trying to look at different versions after having to put the project aside for a couple of weeks, and every version I open shows me a list of render files that it says it can't find. I've just been choosing to re-render.
(I'm wondering if a routine session of running disk warrior on my drives could have contributed to this?? Thats the only thing I can think of, other than the OSX upgrade to 10.4.4, which also included a quicktime upgrade.)
I'm new at this so I'm trying to figure out if this disappearance of render files is normal? In one version I chose 'search computer for render files' or something to that effect & I watched it go thru my drives one after another & when it got to the 2nd internal drive (where all the render files should be), it spent about 1/10th the time that it spent searching other drives. It really jumped in & out of that drive really quickly.
Its not all the render files that are missing, I looked in the render folder & some have older dates, while a section of them are from tonite when I re-rendered. Then more with the older date.
Anybody have any advice?
Thanks for your help
Duane
G5 tower Mac OS X (10.4.4)

Hi,
I have been working on color correction for an edit of a live 2 camera shoot concert. Edits are almost all final. I dug into correcting color between the 2 cameras & after some practice got good results.
Tho, I noticed that corrections looked slightly different after rendering them, and again slightly different after exporting to full uncompressed quicktime video.
Saturation levels shifted (less), & some shots showed slightly different color balance. This is a unique shoot because the stage was fully lit in red light & red can be one of the most difficult colors in video (in my experience).
So I eventually started that vicious cycle of correcting not by eye but by anticipating what was needed to get a desired result after rendering & exporting... each time it was lengthy renders & exports before seeing the results.
So I had several versions of the project saved w/ different renderings, etc. All of this is stored on a 250 gig 2nd internal drive which I bought & installed just for editing. All files & edit lists etc were kept there.
So I'm trying to look at different versions after having to put the project aside for a couple of weeks, and every version I open shows me a list of render files that it says it can't find. I've just been choosing to re-render.
(I'm wondering if a routine session of running disk warrior on my drives could have contributed to this?? Thats the only thing I can think of, other than the OSX upgrade to 10.4.4, which also included a quicktime upgrade.)
I'm new at this so I'm trying to figure out if this disappearance of render files is normal? In one version I chose 'search computer for render files' or something to that effect & I watched it go thru my drives one after another & when it got to the 2nd internal drive (where all the render files should be), it spent about 1/10th the time that it spent searching other drives. It really jumped in & out of that drive really quickly.
Its not all the render files that are missing, I looked in the render folder & some have older dates, while a section of them are from tonite when I re-rendered. Then more with the older date.
Anybody have any advice?
Thanks for your help
Duane
G5 tower Mac OS X (10.4.4)

When viewing the color blue on my iPad it appears greenhe correct color appears on my computer screen. Can this be resolved?

When viewing the color blue on my iPad it appears greenhe correct color appears on my computer screen. Can this be resolved?

Try this:
Make sure IOS is updated to latest version
Reboot device by pressing both the home button and sleep/wake (power) buttons at the same time for 10-15 seconds until the apple logo appears on the screen, then let go.
If that doesn't work then reset the device by going to settings/general/reset/reset all settings
(no media or data will be deleted from the device, this will only take a minute).
If that doesn't work then backup and then restore the device as new.
And if none of that works, take it to an apple store or call apple support

Exportation problems color correction

When the file is exported after color correction, the video moves frame by frame, doubling the running time of the video.

At first I thought a reboot cured the problem, but apparently not.

Color correction problem between original sequence and multicam sequence... Please help

I used three camcorders to record a youth dance recital. I created an orginal sequence for the three camcorders and another sequence using the multicam feature to edit the dances. After I finished editing, I went back to the original sequence to make some color correction and brightness adjustments using the Fast Color Correction controls. After that, I sent everything to Encore to create a DVD. When I watched the DVD, I noticed some of my color correction settings were still off, so I went back to the orginal sequence to make some changes. Unfortunately, the multicam sequence would not read the new settings. After a few unsuccessful attempts to get the clip from the multicam sequence to read the clip from the original sequence, I decided to start over by clearing the Fast Color Correction controls from the clip. The multicam sequence then adjusted back matching the original sequence. However, when I started a new Fast Color Correction control in the original sequence, the multicam sequence would not take the new settings. How to I get the mulitcam sequence to read the orginal sequence?

Thank Jim for replying:
I am stumped on this one. I did a few radical tweeks and it did not take. For example, I made one clip in the original sequence go completely dark. However, the clip in the mulicam sequence did not change.
I even deleted the render files and the work area render files and started over with making changes. Nothing. Any change I make on the original sequence will no longer adjust in the multicam sequence.
Any last words of advice before I delete the entire multicam sequence and start over? Thanks.

Color correction problem

Hi.
I usually work on color correction using Color, but sometimes i use CC in FCP.
I have a clip that need to low down black levels, so i tried CC and CC 3 way, but when i click with eyedrop the blackest part of the clip, instead of blancing blacks, it turns all image to blue. What's happened?
can i have some suggest about it?
thanx

To color balance, find anything in the shot that should be white. Using the Color Corrector 3-Way filter, click on the eyedropper for the highlights (the color wheel on the right) then click the white object in the shot on the Canvas window. If you're viewing your edit on a properly calibrated external TV monitor, it should look white there. Do NOT go by what you see in the Canvas as it isn't accurate. You can also use FCP's scopes for evaluation.
If it still looks a little off on the TV monitor and/or on the scopes, use the mouse to drag the dot in the highlights color wheel toward the hue it needs to be (away from the hue that is is currently).
You can also adjust the mid-tones and black balance hue controls as needed, but be careful when using the black levels and hue adjustments; a small adjustment can go a long, long way.
-DH

Problems when rendering color correction.

Hi! I discovered a possible bug in Pro CS3. Maybe in Pro 2 too? When manually adjusting "levels" in the Color Correction menu, the rendering
makes some frame dropouts. I pulled away som blue tint in some
footages and the render results in jumpy playback when people move fast by the camera. Sounds' linear and OK. When scrolling the timeline frame by frame, some frames are gone compared to the original. Ticking
the Effect Icon in the Effects Control window on and off, it changes
back to normal in the original movie. Exporting it as AVI makes same.
But when doing Color Balance instead, and lowering blue, everythings'
normal. Strange!
Bertil - Norway.

Look here and specifically look at how to pose a question and the details required.

Significant quality loss and jagged diagonal lines when exporting from FCP

I've been working on this problem for several days and I'm going insane! Every time I export my movie from Final Cut, there is a significant quality loss. It is most noticeable in two ways: diagonal lines become very jagged (looking somewhat like diagonal lines in an older video game -- more a diagonal sequence of blocks); also, in some areas such as faces, the colors get a little blurry and there seems to some "pooling" of colors around the edges of the face.
I'm pretty sure the problem's not in capture: the Quicktime clips that I captured from the camera are all pristine. When I play them in Quicktime, I can blow them up several times their original size, and they maintain their sharp lines. (I also Reverse Telecined them all with Cinema Tools, if that's relevant.) I also know the problem's not just my computer monitor; when I play these movies on my external monitor and TV, they look bad too. The clips look bad after I bring them into Final Cut, and while I'm editing, but at first I figured that was because Final Cut sometimes doesn't show full resolution in the timeline. Still, when I export, the quality of the original captures just isn't there.
Some details:
Captured from 24A progressive, Sony HVR V1U HDV.
Using Final Cut 6.0.1, Compressor 3.0.1, Quicktime 7.2.0, OS 10.4.10 (all the most recent versions I believe).
I've exported in many different ways: using Compressor (and have tried a number of different settings: the DVD Best Quality 90 Minutes default Setting, as well as using a variety of bit rates from 3.0-8.0, One pass CBR, Two pass CBR, Two pass VBR, Two pass VBR best; Video Formats NTSC, HD 1440x1080...I have tried many combinations. Regardless of the size of the m2v created, the files seem to have the same problem over and over. I've also tried exporting from Final Cut as a Quicktime Movie and with Quicktime Conversion. Same result. I also tried using different compressors with my Final Cut sequence: Apple Intermediate Codec (which I used when capturing -- you have to with the Sony HVR), HDV 1080p24, HDV 1080i60, Apple Pro Res 422, H.264...
What's happening? Why is Final Cut turning my nice pristine captures into jagged foulness? What can I try that I haven't yet?

Welcome to the forums!
Unfortunately, you seem to have tried everything I can think of, and I don't have the latest versions of FCP to know if it is a bug. However, in the off chance that you haven't given this a shot:
Take a problematic 10 second section of your timeline (set in and out points) and the Export -> Quicktime (not QT Conversion) and make sure that you have it on Quality settings that you captured, and select the "Make Self Contained" box.
Look at that in Quicktime and see if it's bad. If it's not problematic, use that video file in Compressor for your render.
Hope that helps!
~Luke

Tif export quality loss

hi,
i exported a tif sequence from a mp4 in premiere (cs6) to do some compositing on it. the exported images look the same but when doing some color correction on it the tif sequence reveals that it's in lower quality.
the left side is the tif export with significant less detail.
i also tried ae with color management but i always had the same problem.
rendering with 'use max depth' and 'use max quality' did not solve the problem.
did i miss something or is premiere processing some colors wrong internally?
(as a sidenote, quicktime player, nuke, vegas12 worked just fine)

hi,
it looks like the problem is related to mpeg 4. i did not have time to do further testing. here is the file info:
Format                         : MPEG-4 Visual
Format profile                 : Advanced Simple@L3
Format settings, BVOP          : Yes
Format settings, QPel          : No
Format settings, GMC           : No warppoints
Format settings, Matrix        : Default (H.263)
it did not occur with other videos.
the interesting thing is that the quality is fine within the timeline. but upon output there is a quality loss.
no, output is 8bit. as mentioned in the first post 'use max depth' did not solve the problem.
quicktime based applications did not have the issue.
as for the color shift problem i thought it is related to the same issue but it was something different and is fixed now. i was unable to edit the post to remove it.

Color correction technique

After editing my project and publishing to a DVD , I've been a liitle disappointed in the color saturation of my final project when viewed on my TV. The video just appears a little flat.
Can someone guide me through a good color correction process that might help with this.
What role do the color bars play in calibration ?
Just as an FYI I don't have a broadcast monitor..I guess I could use a TV ?

It is possible that there could be nothing wrong with your FCE produced DVD.
Could it be that the colour settings on your TV are poor compared with your computer monitor?
Have you tried the DVD on other (possibly better) TVs?
How does your DVD compare with the normal TV programmes? It should be of a similar quality. If it is not then maybe there is some fault in your technique, either in the filming or post production stage etc.
Ian.
PS. Have you tried boosting the Contrast and Saturation on your TV?

Color Correction Novice rounding home stretch w/ a Q

Hi,
So far, I've received some valuable advice & tips for my 1st attempts at color correction, esp since my production falls outside the normal applications. The help has been great!
I went thru my production and did scene by scene corrections, which lost most of its intimidation with enough practice. I still havent tackled the Keyframe approach to having corrections shift during the course of a scene - I'm hoping to escape without having to do that.
Heres my question -
I did all the corrections, with a calibrated external monitor, and then had the program render all the video effects. Then I chose "print to video". When the program ran, the colors were a little different overall than what I had set in the program (less orange, more pink) and in a few scenes (orig underexposed, but corrected in the process), the color shifted more radically, esp in the shadow / black values which fell greenish.
I didnt see any of this as I was correcting, and the signal path was the same when I printed to dvd, same monitor w/ no calibration changes.
Is this normal? Maybe these shifts happen more discreetly in reg productions, mine is a live stage shoot with a lot of red light.
Thanks for all the help, & Happy New Year
Duane
G5 tower Mac OS X (10.4.2)

Hi,
Thanks for all the info, I'm starting to look at ways of sending what I have to people who need to see it. The project will likely still require some tweaking so this isnt a final mastering step by any means. Just looking for something that looks as good as what I see on the monitor after rendering.
Its looking like (from the lasts posts) that 'out thru firewire -> dvd recorder' isnt the best choice & if I can keep it in the computer & flow it directly to its burner, the opportunities for problems can be minimalized.
I tried exporting to quicktime, that resulted in an FCP Quicktime file that took 3 hrs to create & was almost 13 gig. (program is 50 min) so it looked great but was too huge to put onto a disk.
If anyone has guidance in this area, I'd appreciate it. I'm gonna poke around in those options & then likely post a further question seperately on this subject. I want to get it onto a dv disc via toast 6 (I see Quicktime w/ Compression is an option so I'm gonna explore that)
Thank you all again for the correction help, in that 13 gig version, it looked really great (no green in shadow artifacts ! )
Regards,
Duane
G5 tower Mac OS X (10.4.2)
G5 tower Mac OS X (10.4.2)
G5 tower Mac OS X (10.4.2)

Color Correction for Web

This is sort of a generic post questions. I am working on a project for the web. My final output will be to Digibeta. How do others approached color correcting in this situation? Being the computer monitors generally have such different characteristics than a traditional TV. In the past I correct as if I was going to air but this sometimes makes the online videos over saturated and contrasty. I realize there is really no web standard yet but wonder if anyone out there does a lot of web stuff that has any tips.

sRGB is the recommended color space for internet application.< </div>
You'd need to provide some documentation to support that statement.
sRGB is not necessarily meaningful beyond photographic applications. sRGB was designed to roughly reproduce color regardless of local profiling. The sRGB standard was created in 1996 to, among other things, create a smaller number of colors to increase the likelihood of correct reproduction in printing photographs, The mere presence of Microsoft on the list of supporting companies is reason enough to be skeptical.
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleI d=67719
When an RGB image from a high-end scanner or other device is imported into an SRGB environment, however, some color information is lost. What SRGB offers is a lowest-common-denominator view of images in business applications and on Web sites.< </div>
This from the wiki:
As the recommended color space for the Internet, sRGB should be used for editing and saving all images intended for publication to the WWW. Images intended for professional printing via a fully color-managed workflow, e.g., prepress output sometimes use another color space such as Adobe RGB (1998), which allows for a wider gamut.
Images intended for the Internet and created in one of the other color spaces may be converted to sRGB when editing, using a suitable editing program, e.g., Paint Shop Pro or Adobe Photoshop; ideally, the original non-sRGB file should be saved and the conversion to sRGB done on a copy, as some loss of image information occurs when converting to another color space.
Due to the standardization of sRGB on the Internet, on computers, and on printers, many low- to medium-end consumer digital cameras and scanners use sRGB as the default (or only available) working color space. Used in conjunction with an inkjet printer, an sRGB image produces what is often regarded as satisfactory for home use. However, consumer-level camera LCDs are typically uncalibrated, meaning that even though the image is being labelled as sRGB, one can't conclude that the image is color-accurate on the LCD.
The two dominant programming interfaces for 3D graphics, OpenGL and Direct3D, have both incorporated sRGB. OpenGL 2.1 incorporates sRGB textures first introduced by the EXTtexturesRGB extension. OpenGL's EXTframebuffersRGB extensionsupports rendering into framebuffers assuming either a linear or sRGB color space. DirectX 9 supports sRGB textures and rendering into sRGB surfaces using Direct3D.<
bogiesan

Color Correction Quality Loss Computational Problem.

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