4K Buffering Qnap Nas for PMS and Sony TVs for clients

Server Version#: 1.21.4.4079
Player Version#: 8.13.2.23227 (d17acce8)

Server: QNAP TVS-EC880
Client: Sony Bravia 4K UR3

For 4K content, I will typically run into buffering issues even for Direct Play (both video and audio as direct play). I’ve tried a variety of suggestions from the other forums post and have yet to resolve the issue. I have tried two different Sony TVs (1 wired connection | 1 wireless connection) and they both buffer for 2-3 seconds every 1 to 3 minutes).

Out of ideas.

Have you read this?
[INFO] Plex, 4k, transcoding, and you - aka the rules of 4k - General / Tips, Tricks & How-Tos - Plex Forum

Keep in mind all TVs use a 100mb ethernet so it is possible also that your 4k media bitrate is to high to directly feed your TV. What are you 4k media Bitrate streams?

Yes, thanks. Are all Smart TVs capped at 100mb?

The reset tested file is listed at 65mb bitrate.

I have not found one that is not which is why it is recommended to use a Shield or Roku instead, direct play to one of those players and let them stream to your TV.

I have a shield pro for my projector. I haven’t actually tested the same file for it, so I’ll do that as well to confirm.

My 1080p 18 mb blue rays stream easily at 50+ mb. I would think a 65 mb bitrate would exceed 100 easily.

the Plex bandwidth dashboard shows it in the 60-80 range. But the direct play says 120

On shield bandwidth is 70-110 range. direct play states 84. But no buffering so far. I guess you answered my question.

If I may add?

  1. Video bitrate is ONLY the video .
  2. Audio tracks must also be included.
  3. If the file is directPlay then everything in the file must be added to bandwidth usage.
  4. lastly, SumOfBandwidths * 1.20 = AdapterUsageSeen.

(1.20 includes = 1.0 for payload + .07 for TCP/IP + .13 for Plex/HTTPS => 1.20 --close enough)

Example:

60 Mbps video + 1.5 Mbps audio (one stream only)

(60 + 1.5) * 1.2 => 73.8 actual wire usage.

Additional consideration: WiFi is half duplex (only one adapter can talk at a time).
If attempting to stream 100 Mbps to a 100 Mbps receiver – over wifi… there won’t be enough time for the adapter to reply with the “ACK”

Put it on wire and Full Duplex is available. (traffic can flow both ways simultaneously)

ChuckPa, thanks!

@coldhardcash

Did that take out some of the mystery?

A rule of thumb: If single video stream and a single audio stream and no subtitles, add up the bitrates. 83 Mbps is the most you can fit in a 100 Mbps connection. This is why browsers are slow / ugly even through our internet service is fast :roll_eyes: hahahaha

@ChuckPa yes, thanks!

Seriously enjoy when you put the facts to my experiences, thank you!

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.