Should I disable fixed frame rate option?

Nov 25, 2015 at 1:16 AM
I see a "fixed frame rate" option in the Preview 9 version. Is this a similar concept to VBR in MP3 encoding? Can I reduce the GIF file size by disabling this option?
Coordinator
Nov 26, 2015 at 8:52 PM
Edited Nov 26, 2015 at 8:53 PM
Hi,

That option just "locks" the value of the delay of each frame. Some frames may take more time than expected to write on disk. Example:

Option Enabled:

Frame 1: 66 ms. (It actually took 70 ms to write on disk)
Frame 2: 66 ms. (It actually took 89 ms to write on disk)
Frame 2: 66 ms. (It took less than 66 ms to write on disk)

Option Disabled (The delay to write on disk is measured):

Frame 1: 70 ms.
Frame 2: 89 ms.
Frame 3: 66 ms.
Coordinator
Nov 26, 2015 at 8:54 PM
I should probably call "Fixed delay" or "Fixed delay between frames".

Thanks for the feedback :D
Apr 19, 2016 at 8:34 PM
I still don't really get the "feature". Is it that disabled fixed frame rate will more naturally playback the GIF as in: when I record a stopwatch it will show the proper timestamps? Imagine you start the recording exactly as when the stopwatch starts:
frame 1: 100ms delay are really 100ms on the stopwatch
frame 2: 122ms delay are really 222ms on the stopwatch
compared to fixed rate:
frame 1: 100ms delay are really 100ms on the stopwatch
frame 2: 100ms delay are really 222ms on the stopwatch
Coordinator
Apr 20, 2016 at 5:14 PM
Exactly. It's a variable frame rate, calculating the recording lag.