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  1. Member spiritgumm's Avatar
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    sorry for the confusion. It was a deshakered clip of the show's credits. I removed it since I figured out how to fix it. Video was zooming in/out. I guess the mostly black background with odd white shapes moving around caused problems. Havent had that issue elsewhere yet. Reducing Pass #2 Max Correction limits (horizontal/vertical) from default 15 to 1 will fix it, which I will redo later.

    Btw I misidentified the Max Correction as "Max smoothness" in earlier post; I've edited it to read right.

    Later: Ugh - had more zoom in/out in at least one more scene. Looks like I should have lowered the Max Correction for the whole episode.
    Last edited by spiritgumm; 24th May 2011 at 09:24.
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  2. Member spiritgumm's Avatar
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    Unfortunately it looks like the horizontal jitter caused by deshaker happens when any object/person is moving rapidly across the screen and camera is panning to keep it centered (so the background is what's moving quickly).
    I checked the guide at http://www.guthspot.se/video/deshaker.htm
    and was able to eliminate the car jitter if I only process that scene, setting Pass #1 to "Ignore Pixels" with "Let Area Follow." The setting description sounds like it would work best if there's just one object in the scene so it doesnt get confused, but I tried a few other short scenes (single person striding along) and I thought I could still see some jitter. It definitely cant be applied to the whole video since it will produce rocking picture, zooming, etc. Deep Analysis does that too.

    Attached short car scene from a regular deshakered 6 minute segment (as I'm processing the episode in short segments). Shows jitter at about 4 seconds, and also just before car shot switches to man.
    Also attached short clip of the car scene before deshakering. Deshaking just this short scene produces only one noticeable jitter (which can be fixed with "Let area follow" enabled).

    Wish I could figure out how to make the panning fixing process definitely work for each panning scene, or better yet, to be applied to the whole video without causing unwanted side effects.
    deshake clip.avi
    Before.avi
    Image Attached Files
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  3. Your "deshake clip" looks like there are a couple frames out of order (there are 2 points where the car seems to go "backwards")

    Did you try diasble panning on this short section ? It probably doesn't need it. There is only x,y translation

    I'm far from a deshaker expert

    The author posts at Doom9 , and maybe able to help out (he helps other people with what settings to use)
    http://forum.doom9.org/showthread.php?t=49597
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  4. I think deshaker is having problems with the 2nd part of the clip, after coming out of the trees, where the car dips down and then back up

    You could process the 1st half in deshaker, and leave the 2nd half untouched

    (you could clean up the dirt & noise too if you wanted to)
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  5. Member spiritgumm's Avatar
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    Poison, I think I addressed your questions/suggestions in the previous post.

    I figured I would visit Doom as a last resort (if noone here had some advice) - they seem to expect a level of expertise I dont have, and my questions/threads always get deleted because of their video ownership rules.
    I denoise the final clips, not these.
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  6. Clip from post 41, IVTC, deblended, deshaken, noise reduction, grayscale:
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  7. Member spiritgumm's Avatar
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    my deshake sample (I believe with Max correction=1 to lower zooming). Also deshake sample showing background frame motion instead of stable background.
    deshake 1.avi
    deshake 2.avi
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  8. Here's a version that was deshaken using only the top left corner of the frame as a reference. I think this gets rid of the motion you are complaining about:

    Click image for larger version

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  9. Member spiritgumm's Avatar
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    later sample from the sprocket jumping video. Much smaller motion, yet persnickety to fix correctly in deshaker (stabilizes on the people instead of background)
    small motion.avi
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    Last edited by spiritgumm; 17th Oct 2011 at 20:29.
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