AV1 Thumbnailer-Contact Sheet Generator

[ForDexterity]

I've been using Auto-Movie-Thumbnailer v12 for some time now, works great and tailored the presets to my liking. One issue has arisen though which caused consternation, it doesn't process AV1 codec. Significant proportions of Youtube content is now encoded in AV1 and I haven't found a solution for creating previews to this content locally. Can anyone suggest alternatives, software or otherwise to help?

[KarMa]

https://www.videohelp.com/software/movie-thumbnailer

[pandy]

ffmpeg can be used to generate all flavors thumbnails, mosaics, preview etc.

[ForDexterity]

https://www.videohelp.com/software/movie-thumbnailer

This software says it supports popular formats such as "h.265/hevc, h.264, divx h264 mpeg1 mpeg2 mp4 vc1 wmv xvid". Can you confirm if AV1 is supported but unlisted?

[ForDexterity]

ffmpeg can be used to generate all flavors thumbnails, mosaics, preview etc.

I couldn't figure out how to get ffmpeg to ignore videos which already have thumbnails (with same name as the video but ext .jpg). I already have H264 and VP9 videos completed, its just the AV1 which has caused hang ups.

[jagabo]

I couldn't figure out how to get ffmpeg to ignore videos which already have thumbnails (with same name as the video but ext .jpg).

What does that mean? You want to avoid generating a new thumbnail if there's already a thumbnail? And you're using some automated batch process? Just check for the existing thumbnail before calling ffmpeg:

for %%A in (*.mkv) do (
  IF NOT EXIST "%%~dpnA.jpg" ffmpeg -i "%%dpnxA" (the rest of your ffmpeg command line...)
)