apng

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 The parameters 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 来源： https:/

I have PNG (as well as JPEG) images uploaded to my site. They should be static (i.e. one frame). There is such thing as APNG . (it will be animated in Firefox). According to the Wikipedia article ... APNG hides the subsequent frames in PNG ancillary chunks in such a way that APNG-unaware applications would ignore them, but there are otherwise no changes to the format to allow software to distinguish between animated and non-animated images. Does this mean it is impossible to determine if a PNG is animated with code? If it is possible, can you please point me in the right direction PHP wise (GD

Is there no way to play an apng file directly in iOS? I tried AVAnimator , but its solution is to convert the apng file to mvid and then play it frame-by-frame and then to reduce file storage space, it would compress the mvid file into 7z . So, my question is, Am I right about what AVAnimator does? Is there any other solution apart from AVAnimator for this? Yes, that is how decompression of the apng file format is implemented, except that there is no 7z decompression. Decompression is from .apng which is basically the same format as .png with zlib compression. That compressed format is decoded