A few more "basic" registax questions

[John K]

Being a total newbie at using Registax, just wondering how I go about opening AVI files with more than 2320 frames?

When I try and align an AVI file with say 3000 frames I get "Failed to decompress AVI frame" when the program hits frame 2320. This is for files smaller than 2 meg.

Have tried to simply drag the file into Registax but no good (suggestion on cloudy nights.)

Lastly, in terms creating a reference frame, I am yet to fully understand this feature and how to best utilise it.

I did say "basic" questions, so any of your expert advice is appreciated!

John K.

[rumples riot]

John, try getting the latest version of Registax3, you might have more luck with this version and the fixes of previous versions.

As to the reference frame, I find that using this in conjunction with gradient helps to get better alignment. When you create a reference frame you create a smaller version of your final image and this allows some waveletting so that the program can use this for alignment. Anyway, that is how I use it.

[iceman]

Hi John.
What program did you capture the avi with?
What version of Registax are you using?
I've never had that problem, but as Paul said, upgrade to the latest if you haven't got it already.
You can try splitting the avi into smaller components using virtualdub or something similar. You can also try saving the avi as a lot of BMP files (using virtualdub) and then drag those bmp's into registax.

Also, 3000+ frames is a lot! What object were you imaging? What frame rate were you using? What camera were you using?

Create reference frame - I do this as soon as I get into the optimise tab. Leave it at default 50 frames, it will align+stack 50 frames and go to the wavelets tab, I do mild wavelet processing, layer 3, +5.1 or so. Then click continue. You are then taken back to the optimise tab.

What it's doing, is now using that slightly processed frame to try and optimise the rest of the frames against. It's your "this is what I want all the others to look like" frame. It will optimise all other frames to try and look like that one, and will help weed out the bad frames, so when you go to the stackgraph slider (on the stacking tab), you can choose only the best (drag down the vertical slider) and leave the bad frames (that don't match your optimised one) out of the stack.

Hope that helps!

[John K]

Thanks for the comments.

Mike - I am using AMCAP to capture AVI's which came with the NexImage camera. Have downloaded K3CCCD and VirtualDub? but struggling somewhat to use the camera with these. Any suggestions on other easy to use capture software?

Using Registax Version 3.0.1.10 (I think there is one later one that just came out other than this one?)

I set the frame rate at 10fps and also 15 fps for Mars

The reason I would like to go to 3000-5000 frames is that the seeing in my location is so poor that I want the ability to knock off as many good frames as I can and eliminate 50% of the bad frames. I also think that with the NexImage camera, to reduce noise effectively, you need to get to around 1500 stacked frames for Mars (early experiences).

rumples riot - thanks for comments. Have been using the gradient function - also have tried Sigma Hi/Sigma lo