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Graphics corrupted in master movie, but not FCP
I’ll try to explain this as best I can. I have a sequence of video and still images. Some images have movement on them although very subtle. In FCP you can play out the sequence and everything looks great. However, after exporting using the Quicktime Export – current settings, the resulting master self-contained file has issues with some of the graphics, but not all.
The problem. It looks like there is a TV scan line effect applied to the images. One horizontal scan line is good, but the alternating scan line is darkened. One detail. The last frame of the “corrupted” image is fine. Again, it’s not all the images and there is no rhyme or reason to which graphics.
One solution we tried was to go to the original image files and apply the NTSC Filter to each one just in case the original file maybe had illegal colors in it. This did not correct the issue.
Any thoughts?
The images are Photo-Jpeg and vary in size like say 3000×2000 and are RGB color space.
Sequence is Apple Pro Res HDTV 1080i.
FCP 6.0.5
QT 7.6
Mac OSX 10.5.6The Visual Rabbi
TheVisualChurch.com
“Crafting Visual Messages to Engage and Persuade” -
6 Replies
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And you are viewing this on what monitor? Please don’t say computer.
Steve Eisen
Eisen Video Productions
Board of Directors
Chicago Final Cut Pro Users Group -
Give me a chance here. yes, we are viewing it on an Apple Display.
HOWEVER, the “banding” or “scan line” issue only appears on certain images and not on others. At one point, we tried applying the NTSC filter to the offending images, but still had the problem.
UPDATE: I applied the “De-interlace” filter ONLY to the offending images and that cleared the “banding” issue. Now the video is acceptable.
—Just one caveat. The images that were fine play out perfectly, and you can’t see any interlacing on playback. The offending images that now have the de-interlace filter play out acceptably (the “banding” is gone), but you can see the interlacing. I suppose this is due to watching it on a Progressive monitor. What I don’t understand is why all the images don’t have this interlacing.
The Visual Rabbi
TheVisualChurch.com
“Crafting Visual Messages to Engage and Persuade” -
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Nope. It’s a mix of XDCam 1080i, NTSC, and still images. We set the sequences to the Apple Pro Res 1080i60 Codec. The main reason for that is render times in the XDCam codec are totally ridiculous. We are editing on a G5 Dual 2.5, and we don’t have an AJA card to speed things up.
I’m telling you. I still can’t figure it out. As I’ve stated, two images back to back in the same sequence – one plays out fine, and the other has this weird “banding” effect on it. Again, you don’t see it in FCP on playback. Only when you view the master in the Finder or in QT Player.
We thought it might be a corrupted Render file, but that didn’t pan out either.
The fix was to apply a De-Interlace filter on the offending images. The project is done to mastered, but rest assured we are going to go back and try to figure out what happened. Probably added 8 hours.
if you had suggestions, by all means throw them our way.
Thanks.
The Visual Rabbi
TheVisualChurch.com
“Crafting Visual Messages to Engage and Persuade” -
Having a similar problem. Seems to be a glitch in FCP, because it is now happening on a regular basis. Images look fine in FCP, but on export there is a weird banding effect. Sometimes the image is completely gone, revealing the layer underneath. Occurs whether viewed on computer or video monitor. Occurs after deleting render folder and re-rendering. Project due tomorrow, am now at wits end. About to reinstall FCP…
FCP 6.0.5
Unibody Macbook Pro -
[Jordan Streiff] ” Seems to be a glitch in FCP, because it is now happening on a regular basis. Images look fine in FCP, but on export there is a weird banding effect.”
that would be a color space issue. I assume all of your graphics are RGB? what about alpha channels.
Have you tried RENDERING the file out then returning to FCP?
it is something you are doing file type, color, a psd layer issue
– not some that FCP is doing randomly to you.gary adcock
Studio37
HD & Film Consultation
Post and Production WorkflowsCheck out
https://www.aja.com/kiprotour/Inside look at the IoHD
https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php
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