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

Excoriation

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

Answer 1

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.

Peptidase

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] – Excoriation

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

github.com/FFmpeg/FFmpeg/blob/… – Hereafter

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

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

I just get "option plays not found". :-( EDIT: actually, you have to put -plays 0 after the -i file option for some reason and then it works. – Isacco

@Isacco The plays option belongs to the APNG muxer so it goes along with the output options. Have a read of ffmpeg.org/ffmpeg.html#Description – Peptidase

Yeah I had to put it after the -i argument and then it worked. – Isacco