dropped frames

[salingthehighseas]

Hello fellow Jellyfin users I am having some trouble with dropped frames and stuttering. This problem only happens when I am playing a movie through firefox web-browser on Desktop computer (Dell i7-4790, 16GB RAM, RX6600 Graphics Card) . Surprisingly when streaming on my Iphone 13 using the firefox mobile app I don't have any issues very smooth stream no strange dead or blocky pixels.   I do have hardware trans coding enabled as I have an HP-EliteDesk 800 G4 with an Intel i5-8500 (iGPU specs: Intel CoffeeLake-S GT2 [UHD Graphics 630] w/ 8GB of RAM. 

Below you will see the video playback information:

Jelly-fin Version: 10.8.11
Operating System: Linux (JF running in docker container)
Architecture: X64


Playback Info
Player:
Html Video Player
Play method:
Direct playing
Protocol:
http
Stream type:
Video
Video Info

Player dimensions:
2560x1307
Video resolution:
1920x1072
Dropped frames:
1629
Corrupted frames:
0
Original Media Info

Container:
mp4
Size:
1.9 GiB
Bitrate:
2.5 Mbps
Video codec:
H264 High
Video bitrate:
2.2 Mbps
Video range type:
SDR
Audio codec:
AAC LC
Audio bitrate:
285 kbps
Audio channels:
6
Audio sample rate:
48000 Hz


Playback Info

Player:
Html Video Player
Play method:
Direct playing
Protocol:
http
Stream type:
Video
Video Info

Player dimensions:
2560x1307
Video resolution:
1920x1072
Dropped frames:
1629
Corrupted frames:
0
Original Media Info

Container:
mp4
Size:
1.9 GiB
Bitrate:
2.5 Mbps
Video codec:
H264 High
Video bitrate:
2.2 Mbps
Video range type:
SDR
Audio codec:
AAC LC
Audio bitrate:
285 kbps
Audio channels:
6
Audio sample rate:
48000 Hz

I also have a secondary question. I have some media that that is video encoded as 4K HEVC SDR and audio is, AAC - 5.1 Default. All of my client side devices are unable to stream this codec. Is it possible to do a permanent re-encoding of this media?  

Thank you for any advice or guidance.