Major performance issues on synology ds218+

Plex Media Server NAS & Devices
1

Server Version#: 1.18.7.2438
Player Version#: 1.18.7.2438

I’ve been trying with plex on the synology ds218+ for a bit now, and after figuring out how to enable hardware transcoding (get the plex pass), i’ve been getting better performance and am no longer seeing the synology’s cpu on a constant 100%.

Sadly, while a lot of shows seem to work, some higher quality shows and most movies simply keep on hanging, buffering, and stuttering.
Tweaking with the transcoder settings does not really seem to help out a lot, and i’m a bit lost on what to try now.

2

Please do the following:

  1. Verify DEBUG logging is enabled and VERBOSE logging is disabled (defaults)
  2. Restart PMS
  3. wait 60 seconds for it to settle
  4. Recreate the problem
  5. wait another 30 seconds
  6. Settings - Server - Troubleshooting - Download Logs

Attach that ZIP file here

3

Here you go :slight_smile:

Plex Media Server Logs_2020-02-23_21-45-03.zip (2.5 MB)

4

Thanks.

I immediately found what I expected… Subtitles.

Feb 23, 2020 20:16:38.722 [0x7f7ff6e6b700] DEBUG - [FFMPEG] - Format 0x58524742 -> bgr0.
Feb 23, 2020 20:16:38.722 [0x7f7ff6e6b700] DEBUG - [FFMPEG] - Format 0x30313050 -> p010le.
Feb 23, 2020 20:16:38.722 [0x7f7ff6e6b700] DEBUG - Codecs: Testing with profile 'High'
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - Scaled up video bitrate to 43132Kbps based on 1.500000x fudge factor.
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Selected protocol dash; container: mp4
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: analyzing media item 1301
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Jojo Rabbit (2019): Direct Play is disabled
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Jojo Rabbit (2019): media must be transcoded in order to use the dash protocol
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Jojo Rabbit (2019): selected subtitle cannot be converted to a compatible format, burning into video stream
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Jojo Rabbit (2019): avoiding video remux due to burned subtitle stream
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Jojo Rabbit (2019): no remuxable profile found, so video stream will be transcoded
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - MDE: Cannot direct stream video stream due to profile or setting limitations
Feb 23, 2020 20:16:38.723 [0x7f7ff6e6b700] DEBUG - Codecs: testing h264 (decoder) with hwdevice vaapi
Feb 23, 2020 20:16:38.724 [0x7f7ff6e6b700] DEBUG - Codecs: hardware transcoding: testing API vaapi
Feb 23, 2020 20:16:38.724 [0x7f7ff6e6b700] DEBUG - [FFMPEG] - Format 0x32315659 -> yuv420p.

All subtitles need the CPU. The application (player) is calling for subtitles -or- the video is forcing them.

PGS, VOBSUB, and DVDRIP must be burned
SRT, ASS, and SSA (text based) can be sent as the 3rd stream if requested.

5

Righty, i’ll give it a shot without them, but i expected the opensubtitles agent not to require subtitle burning. I’ll have a look and see where we’ll get :slight_smile:
Thanks for pointing this out!

6

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