Using ffmpeg to create looping apng

Question

I'm trying to create looping apng files from mkvs. My problem is that they don't loop. The files play once, but stop.

This is what I'm doing:

 ffmpeg -ss 16:43 -i ./10.mkv -loop 10 -t 1 -filter:v "setpts=PTS-STARTPTS, crop=1200:800, hqdn3d=1.5:1.5:6:6, scale=600:400"  10-file-2.apng

I've tried -loop -1 -loop 10 -loop 1 but there is no looping done. My version is

ffmpeg-3.3.el_capitan.bottle.tar.gz

Solution

The parameter for looping APNGs is -plays.

ffmpeg -ss 16:43 -i ./10.mkv -plays 10 -t 1 -vf "setpts=PTS-STARTPTS, crop=1200:800, hqdn3d=1.5:1.5:6:6, scale=600:400"  10-file-2.apng

• -plays 0: loops forever
• -plays 1: plays once (i.e. no loop)
• etc.

Comments

[Ryan]

ffmpeg -i 'input.mp4' -framerate 5 -plays 0 screenshot.webp was a helpful command for me

[Harry]

Do you have a documentation link? And how do I set infinite loops? -1 Value -1.000000 for parameter 'plays' out of range [0 - 4.29497e+09]

[Gyan]

No doc for apng muxer at all! Strange. Anyway, 0 for infinite loops.

[Ken Sharp]

github.com/FFmpeg/FFmpeg/blob/…

[Ricardo Bohner]

What does this part do hqdn3d=1.5:1.5:6:6 ?

[Gyan]

That's a denoiser. See docs at ffmpeg.org/ffmpeg-filters.html#hqdn3d-1