Recommend adding "-movflags +faststart"

[ghost]

https://github.com/USGS-VIZLAB/gage-conditions-gif/blob/a1030f7353b3e72bf5ce4d137c83359dce54d366/6_visualize/src/combine_animation_frames.R#L11

Using the -movflags +faststart output option will allow the video to begin playing before it is completely downloaded by the client when viewing via progressive download.

Other stuff:

• If you want to add a creation_time/"Encoded date" you can add -metadata creation_time=now.
• Same with title: -metadata title="US River Conditions: 2018". Also artist, comment, date, etc.

[aappling-usgs]

Thanks!