Apple TV Playback Stuttering from Windows 10 Install

[theguitarman]

I am still relatively new to Jellyfin, but I am really enjoying it so far. I ran into an issue last night with some playback, the video would freeze about once every 1-2 seconds, just briefly. 

I have Jellyfin installed on a Windows 10 with a i5 6500 running Jellyfin 10.8.11. I installed using the Windows installer exe. I was playing it back on an Apple TV 4th gen (HD) with the latest version of Swiftfin freshly installed. The video file in question is an MKV, 1080p video resolution. VLC tells me the codec is H264- MPEG-4 AVC (part 10)(avc1).

I spun up my old Plex server and played the video through that, and it played back perfectly fine. Then I went to my LG smart TV and used the built in Jellyfin app to playback the same file, and it also played just fine on there. All devices are hardwired ethernet. I think Apple TV 4th gen only has 10/100 ethernet, but the file played fine in Plex, so I would be surprised if that was the issue. So I guess that means it is an issue with Swiftfin, or maybe an issue with transcoding?

Here is the ffmpeg log from trying to play it:
https://pastebin.com/6nt6Txh3

Any guidance on how to fix this would be greatly appreciated!

[TheDreadPirate]

The transcode log looks fine. It's only transcoding the audio.

Try lowering the quality setting until it triggers a video transcode. Does it still stutter?

[theguitarman]

The transcode log looks fine.  It's only transcoding the audio.

Try lowering the quality setting until it triggers a video transcode.  Does it still stutter?

Thanks for the suggestion, but I do not see a way to lower quality in Swiftfin. I don't think Swiftfin on Apple TV has this option?

[TheDreadPirate]

Another user with an Apple TV had this issue and repackaging the MKV resolved this issue. In an admin power shell terminal. Not sure if you can just state "ffmpeg" or if you have to provide the full path to jellyfin-ffmpeg.

Code:

ffmpeg -fflags genpts -i "D:\path\to\your\video.mkv" -map 0:v -map 0:a -map 0:s -map_chapters 0 -c:v copy -c:a copy -c:s copy outputFile.mkv

https://forum.jellyfin.org/t-solved-trou...2#pid16262