PMS on RPi 4b buffering like crazy

Server Version#: 1.16.6.1592-b9d49bdb7
Player Version#: 3.108.2

Hi all,

I’m having some real trouble with my Plex Media Server on my RPi4b (running DietPi), and was hoping someone could offer some insight into why this is happening. Although I have tested this on a non-optimised file in the logs, I have had terrible results so far with .mp4 files, and cannot determine why this is so slow.

I don’t suspect my CPU, as I’m confident the Raspberry Pi 4b can provide enough juice to handle the task, but I could be wrong. Can anyone make heads and tails of the attached and let me know if I am doing something wrong?

Thank you

Plex Media Server.log (2.4 MB)

  1. The Pi doesn’t have hardware transcoding which is supported by Plex.
  2. You’re trying to transcode HEVC source (the most difficult codec to decode)
  3. It’s grossly out of power.
  4. Additionally, Please keep VERBOSE - OFF until requested. It wastes valuable log space (only 26 MB deep)
Sep 18, 2019 20:56:51.806 [0xa72f3450] DEBUG - MDE: E9 - The Opera: media must be transcoded in order to use the dash protocol
Sep 18, 2019 20:56:51.806 [0xa72f3450] DEBUG - MDE: E9 - The Opera: no direct play video profile exists for http/mkv/hevc
Sep 18, 2019 20:56:51.807 [0xa72f3450] DEBUG - MDE: E9 - The Opera: no direct play video profile exists for http/mkv/hevc/aac
Sep 18, 2019 20:56:51.807 [0xa72f3450] DEBUG - The Opera - video.bitDepth limitation applies: 10 > 8
Sep 18, 2019 20:56:51.807 [0xa72f3450] DEBUG - MDE: E9 - The Opera: no remuxable profile found, so video stream will be transcoded
Sep 18, 2019 20:56:51.807 [0xa72f3450] DEBUG - MDE: Cannot direct stream video stream due to profile or setting limitations
Sep 18, 2019 20:56:51.807 [0xa72f3450] DEBUG - Scaled up video bitrate to 14868Kbps based on 4.500000x fudge factor.
Sep 18, 2019 20:56:51.807 [0xa72f3450] DEBUG - MDE: Seinfeld - S4 E9 - The Opera: selected media 0 / 8154
Sep 18, 2019 20:56:51.808 [0xa72f3450] DEBUG - Streaming Resource: Adding session 0xb0366248:nxzo8f6pmjjoisyobfuqgbrm which is using transcoder slot.  Used slots is now 1
Sep 18, 2019 20:56:51.808 [0xa72f3450] DEBUG - Streaming Resource: Added session 0xb0366248:nxzo8f6pmjjoisyobfuqgbrm
Sep 18, 2019 20:56:51.808 [0xa72f3450] DEBUG - Streaming Resource: Reached Decision id=9108 codes=(General=1001,Direct play not available; Conversion OK. Direct Play=3000,App cannot direct play this item. Direct play is disabled. Transcode=1001,Direct play not available; Conversion OK.) media=(id=8154 part=(id=8443 decision=transcode container=mp4 protocol=dash streams=(Video=(id=11451 decision=transcode bitrate=14868 encoder=libx264 width=1920 height=1080) Audio=(id=11452 decision=copy channels=2 rate=48000) Subtitle=(id=11548 decision=transcode bitrate=2147483647 encoder=ass languageCode=eng location=sidecar))))
Sep 18, 2019 20:56:51.810 [0xa72f3450] VERBOSE - It took 0.0 sec to serialize a list with 1 elements.```

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