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I imported a bunch of frames as layers and did Filters → Animation → Optimize (for GIF). I got the layers transformed and delay applied to each layer’s name. In my case it is "(100ms)". But I’d wanted this delay to be 50ms, so I could then set specific delay for some frames manually.
Okay, you have 150 frames which GIMP marked as 100ms. You need all them to have a 50ms delay except the last one which must have 2000ms. Try to do that in export menu. – tijagi – 2013-01-22T03:53:34.627
You will need to get rid of the optimisation, either by importing your frames as layers again or programmatically remove the delay in the layer name. Afterwards to can provide the non-default delay and use the export dialog. – romanofski – 2013-01-22T04:03:52.130
"programmatically"? – tijagi – 2013-01-22T04:40:57.757
"programmatically" meaning by using a script written in a programming language to "unset" all delays in the layer names. – romanofski – 2013-01-22T04:45:12.500
Or answer or move that question to StackOverflow then – tijagi – 2013-01-22T04:59:39.883