What we want ?
We want to assemble two sequences of frames over a background
picture, with different frame numbers in their name.
The result must be a sequence
of bmp frames : result0001.bmp to result0100.bmp
What do we need ?
We need the background picture and the two sequences of frames
in BMP, TGA or JPEG format.
Background image : bkg.jpg
First sequence : first0001.tga to first0100.tga
Second sequence : second0800.tga to second0899.jpg
How to ..
First, select the project size.
The background is a still picture, a single frame. Add a line
with the [Load] operator to the list.
Select the file with the browse button. Set destination to A.
For the first sequence, add a line with the [Load] operator
to the list.
Check the [x]Sequence of frames checkbox and type the number of
the first frame in the 'Start frame number' field : 1.
Select the file you will need to do your setup. This is not necessarily
the first frame of the sequence.
Example : the sequence represents a car that comes from far away
and stops in front of you. In the first frames, the car is very
small (few pixels only) and you won't be able to adjust your operators
with it. You must take a more significant frame, near the end
of the sequence.
In our case, we will choose first0050.tga. Set destination to
B.
Same operations for the second sequence, add a line with the
[Load] operator to the list.
Check the [x]Sequence of frames checkbox and type the number of
the first frame in the 'Start frame number' field : 800.
Select the file you will need to do your setup, say second0820.tga.Set
destination to C.
Now we will add all necessary work by adding the adequate operators.
For this example, use :
"overlay" source B destination A
"overlay" source C destination A
The A picture will contain the result of our work.
Now use the save operator. Don't forget to check the [x]Sequence
of frames Checkbox.

Use the browse button to enter the name of the file. Select
also the file format by choosing the appropriate extension.
The name should be result0001.bmp.
Type the number of the first frame in the 'Start frame number'
field : 1.
Now we will start to create the frames, enter
100 in the 'Frames' field.
Hit the [Process] button.
A small window will show, with a [Stop] button during the process.
The job is done.