I successfully managed to output a video time-series of processed Sentinel 1 SAR images in GEE for my areas and dates of interest by adapting an existing script. However, I've not been able to timestamp it. I have tried working off some help provided to the following two discussions and scripts within, but with no success. Adding timestamp to video export in Google Earth Engine How to add a Timeline tool to Time Lapse in GEE?

I have tried many things with many errors, but my error with the script at its current state is:

Collection.iterate: Error in map(ID=1):
Date: Parameter 'value' is required.
    in <global>, line 165
    in <global>, line 175

This is my full code: https://code.earthengine.google.com/b1f180b3f823680d8d138dee1d0536bc and the portion that I use to try to timestamp is below:

var text = require('users/gena/packages:text');
var S1_comp =  S1_comp.map(function(image){
  var start = ee.Date(image.get('system:time_start'));
  var end = ee.Date(image.get('system:time_end'));
  var label = start.format('YYYY-MM-dd').cat(' - ').cat(end.format('YYYY-MM-dd'));
  return image.visualize({
    forceRgbOutput: true,
    //palette: palettes.BrBG[9], //original palette was "000000", "fdbb84"
    //min: 0,
    //max: 1
  }).clip(roi).set({label: label}); 

// annotate
var annotations = [
    position: 'left', offset: '1%', margin: '1%', property: 'label', scale: Map.getScale() * 2

S1_comp = S1_comp.map(function(image) {
  return text.annotateImage(image, {}, roi, annotations)  

  • 1
    For the record, I didn't find an answer to this - I timestamped the video in python after creating it in GEE.
    – Beardsley
    Mar 15, 2021 at 20:44
  • How did you timestamped it in Python?
    – Adi
    Apr 10, 2023 at 2:03


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