Roger,
This is from Michael Covington's site, might be helpful.
Clear skies
Rod

http://www.covingtoninnovations.com/...SLR/index.html
Now for the tricky part. Canon records .MOV files and RegiStax wants .AVI files.
There are many ways to convert .MOV to .AVI, and most of them are wrong! The problem is that they recompress the image and lose fine detail. Eventually, this shows up as strange things in your image — mottled areas and even rectangles and polygonal shapes from nowhere!
The .AVI file format is a "container," which means it holds AVI files in many different formats, and the ability to play them depends on the codecs (coder-decoders) that happen to be installed on your computer. That's the cause of the maddening but familiar phenomenon that some video files will play on some computers and not others. .MOV is also a container, although the movies are almost invariably in QuickTime format.
Here's one way to do the conversion right: Use
WinFF, which is a free video format converter — an exceptionally good one, not plagued by adware like its rivals! Tell it you want to convert to AVI, and specifically "MS Compatible AVI". Click "Options" and on the "FFmpeg" pane, add the additional command line argument "
-vcodec rawvideo" (no quotes). You'll get large AVI files that are pleasing to RegiStax. Since you're going to do this conversion regularly, you can save it as a "preset."
Expect the converted .AVI files to be big. Since you can regenerate them at any time, you don't have to keep them.
You can also
do the conversion through the excellent, free VirtualDub video editor. Download, unzip, and install the appropriate version of VirtualDub (32- or 64-bit). To do this, manually make a folder on your desktop and copy the files into it. (There is no installer.)
You'll see that VirtualDub doesn't open .MOV files. To fix that, get the
FF Input Driver for VirtualDub. It unzips to make a folder named
plugins or
plugins64. Copy that folder into your VirtualDub folder (that is, make it a subfolder of the folder that VirtualDub is in), and now VirtualDub can open and edit .MOV files. When you save the file as AVI, it is uncompressed and suitable for RegiStax.
Of course, the best thing is that VirtualDub can edit video files, not just convert them. You can trim off any part of the video where the telescope was shaking or the image is otherwise useless.
Further, VirtualDub produces 24-bit output; WinFF produces 12-bit output. Since the 60Da has a 14-bit sensor readout, I don't know whether WinFF is losing something or whether the .MOV file was already limited to 12 bits.