Plex Skipping forward by a few seconds on Web Player

Plex Players Desktop Players
201

I’ll be trying to reproduce the problem on the asset from @szaimen and from my own library.

We’ve identified that hardware-accelerated decoding in Chrome causes the video artifacts but does not cause the audio skipping. There’s one more step to completely eliminate Chrome’s decoder.

Below is an ffmpeg command that remuxes an MKV into direct playable MP4. Theory is, if this file plays correctly then the issue is caused by direct streaming. While if this file plays poorly then it’s a decoder issue.

I leave this here for anyone that’s interested in the details and wants to sherlock along with us.

ffmpeg -i "input file.mkv" -c:v copy -c:a aac -ac 2 -metadata:s:a:1 title="" "output file.mp4"
  • ffmpeg
    • -i "input file.mkv": name of the input file, be sure to quote paths with strings
    • -c:v copy: copy the video stream untouched
    • -c:a aac -ac 2: convert audio to stereo AAC
    • -metadata:s:a:1 title="": set the title of the first audio stream to an empty string. I noticed in my testing that the original title was used by default. It was confusing to see the original title on the new audio stream.
    • "output file.mp4": name the file anything you choose so long as it ends in .mp4