SwiftFin on AppleTV 4- Can't fast forward, doesn't save progress

[TheDreadPirate]

AVI, MP4, MKV.

You could try remuxing one of the m4v's to see if that helps. m4v's are essentially Apples version of MP4 with DRM.

Code:

sudo docker exec -it jellyfin bash
/usr/lib/jellyfin-ffmpeg/ffmpeg -fflags +genpts+igndts -i "/path/to/video.m4v" -map 0 -codec copy -max_muxing_queue_size 2048 -max_interleave_delta 0 -avoid_negative_ts disabled newFile.mkv