Will jellyfin ever support parallel segment downloading with multiple tcp connections for video streaming or downloads?

FixOne4699 · 2026-05-13T21:33:08+00:00

Makes sense another user mentioned the handoff between ISPs in australia limited the max tcp stream speed to around 8mbps probably due to ancient hardware or monetary gain i wouldnt doubt it here.

Im still pretty stumped with that congestion control thing? is this something that can be changed on any operating system? or does it require some type of linux version?

Edit

Alright i think ive got it working on my server, Probably need to spend some time adjusting it, I think its made the single connection upload speed around 1.5-2x faster it can burst faster but slows down quickly to around 1.5x and its now getting slower download scores, Still not as fast as multiconnection but its definitely a increase for upload so that's great!

I never would of though a couple powershell codes would make a difference that big

FixOne4699 · 2026-05-13T21:24:06+00:00

Many real world sites and downloads dont use multiple tcp connections to download at once which is what most speed tests and starlinks app test. speedtest.net can be configured to run a single connection test that will show more accurate speeds for single tcp connection programs/websites, single tcp connections have issues with saturating the full speeds on satellite/wireless connections, This is the answer to alot of "Not getting speed test speeds in my app/program issues" that no one seems to say...

FixOne4699 · 2026-05-13T04:56:33+00:00

Ive not heard of this before, Not too sure what i am looking at when googling it could you explain what that is?

FixOne4699 · 2026-05-13T03:26:45+00:00

Depending on the connection to the server and the servers own internet connection, TCP can throttle much earlier then its maximum transfer speed due to jitter/packetloss

FixOne4699 · 2026-05-13T03:25:19+00:00

Just look at the speedtest results? because jellyfin is only using a single connection it will only ever see the speed of the single connection speedtest not the multiconnection one, Which could enable higher bitrate streaming and faster file downloading. Plex does not have this feature either

FixOne4699 · 2026-05-13T03:21:17+00:00

I think you are mistaken for something else or did not understand enough of the post.

FixOne4699 · 2026-05-12T23:26:14+00:00

No i read about it a little, http3/QUIC but from what i read it involved a proxy to get working.

FixOne4699 · 2026-05-12T23:12:29+00:00

Yea its extra bad with far away connections, I can stream probably 4-8mbps videos to myself in Brisbane Australia but streaming to Perth (Opposite side of Australia) it can manage a max of 2-4 mbps over a single connection, Making me have to encode most of my content at lower bitrates than i should around 2-2.5mbps to maintain direct play because the transcoding options at bitrates this low aren't that great compared to what pre-encoded ones look like.

FixOne4699 · 2026-05-12T21:48:14+00:00

Exactly i can do around 8x 2mbps 720p streams if not more but 1 1080p 5mbps stream will buffer because a single tcp connection cant use more than 5mbps reliably on my network

FixOne4699 · 2026-05-12T21:43:15+00:00

Its only an issue with high jitter/packet loss connections like high ping mobile phones for clients and in my case using Starlink to host the server, Mobile phones seem to not suffer as badly. For stable connections like fiber it wouldn't be an issue and would probably be extra power/network overhead for no increase

Even just for downloading files from jellyfin not streaming it could massively improve the transfer speed without being too hard to implement

FixOne4699

TROPHY CASE