deshaker filter problem

[nivek_nayr]

hey guys
some querry about deshaker filter
i want to stabilize my video (mp4) but everytime i output the video the results were a lot of pin images on the output screen. pls need help..pls need specific step by step process

[redwudz]

That sounds like the results from the first pass that sets up the 'deshaking'. It should make another pass to use the information from that first pass.

From one site: http://www.guthspot.se/video/deshaker.htm

During Pass 1 the filter tries to find the panning, rotation and zoom that, when applied to the current image, makes it look like the previous image (almost). It does this by taking blocks of pixels in the two images and finding the shift that makes them match as good as possible. First, to find the "big" motion, the images are reduced a lot in scale and the initial shift is calculated from the whole (scale-reduced) images. This shift is then fintuned in a scale twice as big and with four times as many blocks, and so on. Finally we have the block shifts (or motion vectors) in the full image. The filter then finds the best values for panning, rotation and zoom based on these motion vectors and those values are written to the log file.

At the start of Pass 2 the values in the log file are read and optimal camera motion is calculated based on the smoothness settings. The filter then transforms each image of the video clip according to this motion.

Or a bit more complete guide: http://www.sundancemediagroup.com/articles/deshaker_guide.htm

Note: Both references may not be to the 'deshaker' filter you are using, but there should be enough info between the two.

[nivek_nayr]

tnx for the tip
hope it works for me.

[nivek_nayr]

That sounds like the results from the first pass that sets up the 'deshaking'. It should make another pass to use the information from that first pass.

From one site: http://www.guthspot.se/video/deshaker.htm

During Pass 1 the filter tries to find the panning, rotation and zoom that, when applied to the current image, makes it look like the previous image (almost). It does this by taking blocks of pixels in the two images and finding the shift that makes them match as good as possible. First, to find the "big" motion, the images are reduced a lot in scale and the initial shift is calculated from the whole (scale-reduced) images. This shift is then fintuned in a scale twice as big and with four times as many blocks, and so on. Finally we have the block shifts (or motion vectors) in the full image. The filter then finds the best values for panning, rotation and zoom based on these motion vectors and those values are written to the log file.

At the start of Pass 2 the values in the log file are read and optimal camera motion is calculated based on the smoothness settings. The filter then transforms each image of the video clip according to this motion.

Or a bit more complete guide: http://www.sundancemediagroup.com/articles/deshaker_guide.htm

Note: Both references may not be to the 'deshaker' filter you are using, but there should be enough info between the two.

tnx a lot dude it works well for me now.this forum is great!!

[tinkyawoo]

Hi,

I tested deshaker on a clip of my shoots and it work really good. very much stable
but when i apply the same setting to a weding of my friend. there start the problem.
video seems keep rotating left right a bit. and even got shaky even tough source movie is stable.
i want to know what happen. because my shaky source clip become stable in my test.

Tin

[tinkyawoo]

now i know. DeShaker have problem with Scene changes, and Panning.