This demonstrates an approach you could probably adapt. Basically, you could
Inset a dynamic object showing your sequence of video frames into a Graphics expression that shows your desired overlay:
frames = Import["ExampleData/cellularautomaton.gif"];
(* One way to do a simple overlay on a sequence of frames that doesn't have various animator controls stuck around it *)
(* You'll probably want to heavily modify this to suit your actual application *)
Graphics[
{Inset[
DynamicModule[{i = 1},
Dynamic[
Refresh[
frames[[i = Mod[i, Length@frames] + 1]],
UpdateInterval -> .25
],
TrackedSymbols -> {}
]
],
Center,
Center,
16
],
Thick, Red,
Circle[],
Line@{{{-1, 0}, {1, 0}}, {{0, -1}, {0, 1}}}},
PlotRange -> {{-8, 8}, {-8, 8}}
]
(* A nice Graphics expression with dynamically updating frames should now appear in your notebook... *)
(* If you did want to modify frames for Export... *)
newFrames =
Table[
Rasterize[
Graphics@
{Inset[frames[[i]], Center, Center, 2],
Circle[],
Line@{{{-1, 0}, {1, 0}}, {{0, -1}, {0, 1}}}},
"Image"
],
{i, Length@frames}
];
Export["test.gif", newFrames];
(* To demo the result of the Export *)
Import["test.gif", "Animation"]
Since I can't really show a Dynamic object in a post here (not yet, at least to my knowledge), here's the GIF from the Export to demonstrate what the Graphics expression with embedded Dynamic looks like:
