Hello @chrisir,
It has been a while since I did this so took it out for a spin!
MovieMaker uses FFmpeg under the hood and you can certainly customize.
It some effort to get Movie Maker working on my computer:
Code to generate frames:
/**
* MovieMaker Frame Generator for Testing
*
* Author: glv
* Date: 2025-07-19
* Version: 1 0 1
*
* Description
*
* Generates frames for testing:
* - target frameRate for MovieMaker
* - background color change at marker (10s)
*
* Notes:
* - frameCount for setup() is 0 and draw() starts at 1; adjust as necessary
* - saves images from 000001.png to 000601.png
* - sketch frames show text counting from 0 to 299 (yellow) and 300 to 600 (red) background
* - tga are really fast!
* - can increase frameRate for fast rendering! Not with audio. :)
*
*/
int framesToSave;
int t0, t1;
int marker_10s;
void setup()
{
size(300, 300);
//surface.setVisible(false); // Does not speed things up!
t0 = millis();
int audioTimeSecs = 20; // Must be in seconds
int desiredFrameRate = 30; // For MovieMaker!
frameRate(1000); // Make this 1000 and let the rendering fly!
marker_10s = 10*desiredFrameRate;
//println(marker_10s);
framesToSave = audioTimeSecs*desiredFrameRate;
println("It's show time!");
println();
println("audioTimeSecs:", audioTimeSecs);
println("desiredFrameRate", desiredFrameRate);
println("framesToSave", framesToSave );
delay(1000);
println();
// Common to all text:
textAlign(CENTER, CENTER);
textSize(96);
fill(0);
}
void draw()
{
// I wanted this on top of draw for now...
if(frameCount > framesToSave) // Saves frames 1 to frameSave - 1
{
println("Last unsaved frameCount:", frameCount);
t1 = millis();
int dt = t1-t0;
println("Total time:", nfs(dt/1000.0, 0, 2) + "s");
println("Average frame:", nfs( (float) dt/framesToSave, 0, 2) + "ms");
// Unsaved last frame:
background(0, 255, 0);
text("Done!", width/2, height/2);
//exit(); // Your choice!
noLoop(); // See last frame
return; // Goes directly to end of draw from here!
}
// These frames will be saved:
println("Saved:", frameCount); // May slow things down!
if(frameCount > marker_10s)
background(255, 0, 0);
else
background(255, 255, 0);
text(frameCount-1, width/2, height/2); // Adjusted so starts at 0
saveFrame(dataPath("") + "\\" + "######.tga"); // Hyperdrive! tga is fast!
//saveFrame(dataPath("") + "\\" + "######.png"); // png is slow! Needs to compress.
}
This (it is in there) was used to delay audio and worked:
There are other tools for doing this!
You will have to explore this… my toolbox needs an update.
Have fun!
:).