When I paste a giphy url (like this one) into a facebook post or comment, the gif plays immediately and loops indefinitely. When I upload ones I make from ffmpeg, neither of those things happen. You have to click a play button to start the animation and then it ends after one time through.
I have a couple of ffmpeg commands I use to create the gifs. They are:
ffmpeg -ss 10 -t 5 -i input.m4v -vf "fps=15,scale=800:-2:flags=lanczos,palettegen" -y palette.png
and
ffmpeg -ss 10.6 -t 5 -i input.m4v -i palette.png -filter_complex "fps=15,scale=800:-1:lanczos[video];[video][1:v]paletteuse" output.gif
The first one generates a custom color pallet that's used by the second one to create a high quality animated gif. I've also tried adding -loop 0 (i.e. ffmpeg -ss 10.6 -t 5 -i input.m4v -i palette.png -filter_complex "fps=15,scale=800:-1:lanczos[video];[video][1:v]paletteuse" -loop 0 output.gif) but that didn't work either.
I also tried uploading the ffmpeg generated images to a personal website and calling them from there but those didn't load at all.
In case it helps, here's a copy of one of the gifs (which autostarts and loops on StackOverflow for me but not on FB)
How does one go about creating a gif that will autostart and loop indefinitely for facebook?
(Note: I've got no problem if I need to do something with a personal website, but I don't want to use Giphly or the other animated gif sites directly if at all possible. Also worth pointing out that I discovered if I download the image from giphly and upload it, it doesn't autostart either. So, this may be something internal to FB, but I'd still like to figure that out.)
