Glad that the MainConcept MJPEG CODEC is working for you.
Since you do not have AVCHD footage, do not choose one of those. Instead, look at the rest of the G-Spot screen and choose a Preset that matches 100%. If there is not one, then choose Desktop and customize the attributes to match what G-Spot told you.
Once edited, you can Export to what you need.
(the person who filmed these avi's for me doesn't think it matter's what type of camera filmed the footage although I told them I needed to know in order to edit it in Premiere Pro CS4)
It can help, but many of the mjpeg avis are coming from cameras where it does not help so much. As Bill says, you need to get as much info as you can about the file (Gspot it), then find/create a proper sequence.
the signal must have been converted to digital HD because my understanding is that the Motion JPEG codec comes from an analog signal.
Mjpeg was a popular format several years ago, and often used then for analog conversion. But it is being used in many still cameras/helmet cams etc.
it is being used in many still cameras/helmet cams etc.
Yes, in the last 18 mos., it has had a major rebirth, especially with the newer Nikon DSLR's that record video too.
It is a far better CODEC for the helmet cams, than that damned Xvid, that some use. MJPEG is usually fine to edit, with the proper CODEC, while Xvid is NOT editable without conversion, and then the quality is horrible. That "stuff" is only meant to be viewed in a streaming environment and NOT edited.