Browser playback is a stuttery mess

[TheDreadPirate]

If multiple clients are stuttering with direct play this leads me to believe that the issue might be due to poorly authored MKVs, if your files are MKVs. MKVs have a strict time code implementation. A poorly remuxed MKV can cause the issue you are describing.

The solution to this is to use ffmpeg to re-containerize all the streams.

Code:

ffmpeg -i yourcurrentMKV.mkv -map 0:v -map 0:a -map 0:c -map_chapters 0 -c:v copy -c:a copy -c:s copy newMKV.mkv

This will re-containerize the MKV without reencoding anything. Should be very quick.