I some avi files which are videos taken through a microscope with digital cameras. They've got incidental sound on them, from the camera, which I don't want. Need to take that out and perhaps add a commentary or background music or both. They have some bits more interesting/useful than other bits so they need cutting up. There's many of them and they're small so they need joining often into something more useful. There's many suggestions on the web but when I go look at them there often turns out to be something wrong - like that 'Lightworks' seemed to be exactly what I wanted but it turns out the free edition limits the output to 720p or somesuch, too low a resolution. It is important that these images be maintained in as high a resolution as possible. We're trying to look at tiny things and see them clearly. Perhaps this forum can help me with some direction? regards, ab.