Plex server Version 1.10.0.4523 perfectly transcodes 4k 10bit HDR files with about 15% cpu usage

Thank you Plex team

I have been running Plex and other software on my DS918+ for the past 5 months and was rather unsatisfied with the performance of it.

I started with 2 8TB (shucked) Western Digital Easystore drives in an SHR-1 Disk group with a single BTRFS volume.

I/O operations were much slower than I was expecting. I even installed more RAM (12GB total) and a 256GB M.2 SSD cache. These things helped, but it was still slow. Whenever there was anything using any I/O, other applications would suffer. Whenever Hyperbackup was running, the NAS was practically unusable for anything else. This was especially annoying since my initial backup took about 24 hours to complete.

Today I finally was frustrated enough to wipe my entire NAS and start over.

When I reformatted it, I chose to make 2 different volumes: EXT4 for the main volume and a smaller BTRFS volume for virtual machines.

Once my restore from backup was complete, the difference was night-and-day. Performance is MUCH better. Everything runs as I would expect now. I am running Hyperbackup now and I'm able to use other apps without issue.

Despite Synology pushing its users to use BTRFS, I would not recommend it if you wish to install Plex and/or any other apps on your DiskStation.

Synology 918+
PMS Version 1.13.0.5003 (64 bit)
Client - doesn't matter. I've reproduced it on everything I have, Roku, XBone, Mac, Chrome, etc.
This is direct play, no transcoding

When playing from the beginning of any media everything works fine. Resuming the same media at any point causes PMS to loop requests on different ports until the server crashes.
There is no other activity on the server, I clean started everything with nothing in the logs. It's 100% reproducible every time.

Here is part of the loop. I can provide the logs if required.
May 03, 2018 21:22:07.598 [0x7f03febaa700] DEBUG - Request: [192.168.1.177:64410 (Subnet)] GET /library/parts/80502/1424622621/file.m4v (667 live) TLS Signed-in Token (myphsto)
May 03, 2018 21:22:07.599 [0x7f03febaa700] DEBUG - Request range: 30760948 to 0
May 03, 2018 21:22:07.604 [0x7f03febaa700] DEBUG - Content-Length of /volume1/share/Movies/480p.x264.AAC.m4v is 1901023677.
May 03, 2018 21:22:07.668 [0x7f0407d11700] DEBUG - Auth: authenticated user 1 as myphsto
May 03, 2018 21:22:07.668 [0x7f03fdff2700] DEBUG - Request: [192.168.1.177:64411 (Subnet)] GET /library/parts/80502/1424622621/file.m4v (668 live) TLS Signed-in Token (myphsto)
May 03, 2018 21:22:07.668 [0x7f03fdff2700] DEBUG - Request range: 29351085 to 0
May 03, 2018 21:22:07.674 [0x7f03fdff2700] DEBUG - Content-Length of /volume1/share/Movies/480p.x264.AAC.m4v is 1901023677.
May 03, 2018 21:22:07.741 [0x7f0407fff700] DEBUG - Auth: authenticated user 1 as myphsto
May 03, 2018 21:22:07.741 [0x7f03fe5ce700] DEBUG - Request: [192.168.1.177:64412 (Subnet)] GET /library/parts/80502/1424622621/file.m4v (669 live) TLS Signed-in Token (myphsto)
May 03, 2018 21:22:07.741 [0x7f03fe5ce700] DEBUG - Request range: 30789711 to 0
May 03, 2018 21:22:07.747 [0x7f03fe5ce700] DEBUG - Content-Length of /volume1/share/Movies/480p.x264.AAC.m4v is 1901023677.

Hello everyone! I'm really struggling here so any help would be appreciated. Sorry in advance because I know this topic has been done to death but I have read every thread and tried all suggestions but have had no success. So, here are the facts:

1. I have a Synology 1817+ NAS. It runs Plex and the server address is 192.168.1.17 (I believe this is a static IP).

2. I also have an openVPN configuration through "Control Panel->Network->Network Interface" (this appears to assign a different IP address each time it connects). Login credentials come from UseNetServer for VPN access.

3. The modem/router is a D-link DSL-4320L connected to a PPPoE Fibre connection. Port 32400 has been forwarded both TCP and UDP. Despite this, canyouseeme.org cannot see this port as open. I am consistently met with a "connection timed out" message. The modem/router appears to support UPnP.

4. The NAS firewall is currently deactive (I have previously created a rule allowing all ports from all locations, but this didnt seem to work).

5. The NAS has Antivirus Essential which I have tried both on and off but still no success with connecting to Plex outside my network.

6. Currently, Plex shows my public IP as 173.245.209.51 (although I have seen this as 173.245.209.50). I have tried manually specifying a port for Plex (32400), this doesnt seem to work. I have also let Plex choose the port and this changes each time I try to connect however I was still unable to connect outside my network.

7. I have also tried adding IP/netmask entries to "List of IP addresses and networks that are allowed without auth" within the Plex settings.

8. The frustrating thing is that when the VPN is disconnected, remote access connects and my server is visible outside the network.

Sorry for the novel but I wanted to provide as much information as possible. Thanks so much for any advice/information/direction. I'm tearing my hair out over this one!

a5pire

Hi.

Please can someone help... I'm brand new to Plex and am keen to get it up and running ASAP but am having some difficulty. These are my devices all on the same home network:

I have a Synology DS215j running version DSM 6.1.3-15152 update 3
BT Homehub 6
Windows 10 laptop

I am using my laptop web browser to access my Synology. I have installed Plex Media Server on the Synology (version 1.8.1.4139) . Plex Media Server is running and when I click the URL on the Synology to open Plex (https://192.168.1.254:32400/web) the URL opens a new tab on my laptop web browser and asks my to login with my Plex account. I login and this is where I get stuck ... I'm faced with this screen:

Confused what I need to do??? Plex Media Server is already running on the Synology. Why can't the browser see it?

Can someone please help? Ideally quickly as it's driving me mad!

Hi,

When Plex server will support Synology DS118 with Realtek RTD1296 CPU - ARMv8?

Thank,

Hi there!
I am using Plex for over a year now, but recently it is not working any more properly. I haven't changed any of my Server / Plex / Router Settings.

First, my Brother told me, that he can't reach our Plex server from his home anymore, so I checked the Settings.
It said "Not available outside your network", so I turned it off and on again, till it was green.
But still, as soon as I tried from outside my network, it did not work anymore, and it is showing "not available" again.

I tried a lot, Restarting Router, the server, PMS and so on, but I could not figure out what the problem is.

I tried several ideas from this forum, but those that I am capable of did not work. When answering, please understand, that my Server knowledge is NOT professional.

I don't understand it anymore, and it is becoming really annoying. I would be happy if anyone could help.
Thank you very much in advance.

About:
PMS Version 1.12.3.4973
Synology DS916+
DSM 6.1.6-15266 Update 1
Plex Pass User (I am just in the Plex Family)

Thanks,
Puia

I have read many answers but nobody seems to be sure about which format of file system to use. I created a RAID 5 with 4 HD. Btrfs seems to be the ultimate solution to avoid has much has possible any data loss and protect the data with snapshots and use data integrity protection. Some say this is **** and ext4 should be used for Plex Server. I'm confused and I want to do the right choice before transferring over 15 TB on this beast!

Thanks in advance for the answer!

Hi.
I'm having difficulties watching some of my .mkv files. I'm not sure if it will be better with hardware transcoding instead of software transcoding? I have tried googling for an answer of how much performance difference there is on hardware transcoding instead of using the software transcoding opportunity, that is for non plex pass users?

It is lagging when watching a .mkv file h.264 1080p on my Samsung TV QE55Q7, and subs are srt. Cpu usage is 99% I use the built in tv plex app.

What settings should I use, to avoid the buffering/lagging, as it is very annoying that the movie stops every minute for few seconds?
I have attached the logs after the lagging occurred. I started the movie, when it stopped, I waited until it started again, then paused the movie, waited about 30-40 seconds and then downloaded the log ( Settings - Server - Help - Download Logs )

I use a Synology 718+ running version Version 1.12.3.4973 64 bit intel version from https://www.plex.tv/downloads/

xml and logs are attached

Thank you in advance for any help.
Christian.

Is there a way to stop Plex which automatically starting upon NAS power up? Thanks!

The Plex Media Server ran very well few years ago until last week the Portal page failed to launch.
Log shown that error
CodeManager: obtaining decoder 'mpeg2video'
Error issuing curl_easy_perform(handle):51

nas：ds3615xs
plex version：Plex Media Server v1.12.3.4973-215c28d86

when i went to play any movie，i got the same err： Conversion failed. A required codec could not be found or failed to install.

i had deleted pms，and deleted all folder about pms，and reinstalled ，just added one movie ，and got the same err。

logs：
May 06, 2018 19:13:20.873 [0xefe23b70] DEBUG - MDE: Cold: Direct Play is disabled
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - MDE: Cold: Direct Play is disabled
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - MDE: Cold: media must be transcoded in order to use the dash protocol
May 06, 2018 19:13:20.873 [0xefe23b70] DEBUG - MDE: Cold: media must be transcoded in order to use the dash protocol
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - MDE: Cold: no direct play video profile exists for http/mp4/h264
May 06, 2018 19:13:20.873 [0xefe23b70] DEBUG - MDE: Cold: no direct play video profile exists for http/mp4/h264
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - MDE: Cold: no direct play video profile exists for http/mp4/h264/aac
May 06, 2018 19:13:20.873 [0xefe23b70] DEBUG - MDE: Cold: no direct play video profile exists for http/mp4/h264/aac
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - MDE: Cold: selected media 0 / 1
May 06, 2018 19:13:20.873 [0xefe23b70] DEBUG - MDE: Cold: selected media 0 / 1
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - Streaming Resource: Added session 0xe9e13194:nqni3pvso9q1shkfx5b9hmjg
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - Streaming Resource: Reached Decision id=1 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=1 part=(id=1 decision=transcode container=mp4 protocol=dash streams=(Video=(id=1 decision=copy width=1920 height=1080) Audio=(id=2 decision=copy channels=2 rate=48000))))
May 06, 2018 19:13:20.873 [0xefe23b70] DEBUG - Streaming Resource: Reached Decision id=1 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=1 part=(id=1 decision=transcode container=mp4 protocol=dash streams=(Video=(id=1 decision=copy width=1920 height=1080) Audio=(id=2 decision=copy channels=2 rate=48000))))
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - Found session GUID of tv7lx5n5gd9gb4jr2jo5ck9a in session start.
May 06, 2018 19:13:20.873 [0xe83ffb70] DEBUG - Cleaning directory for session tv7lx5n5gd9gb4jr2jo5ck9a ()
May 06, 2018 19:13:20.874 [0xe83ffb70] DEBUG - Starting a transcode session tv7lx5n5gd9gb4jr2jo5ck9a at offset -1.0 (state=3)
May 06, 2018 19:13:20.874 [0xf03ffb70] DEBUG - Completed: [192.168.1.237:55891] 200 GET /video/:/transcode/universal/decision?hasMDE=1&path=%2Flibrary%2Fmetadata%2F1&mediaIndex=0&partIndex=0&protocol=dash&fastSeek=1&directPlay=0&directStream=1&subtitleSize=100&audioBoost=100&location=lan&addDebugOverlay=0&autoAdjustQuality=0&directStreamAudio=1&mediaBufferSize=102400&session=tv7lx5n5gd9gb4jr2jo5ck9a&subtitles=burn&Accept-Language=zh (8 live) TLS GZIP 3773ms 1155 bytes (pipelined: 3)
May 06, 2018 19:13:20.875 [0xe83ffb70] INFO - CodecManager: obtaining decoder 'h264'
May 06, 2018 19:13:20.875 [0xe83ffb70] DEBUG - HTTP requesting GET https://plex.tv/api/codecs/h264_decoder?build=linux-synology-i686&deviceId=a4bae751-0362-44e0-acf4-f8f47d6677b8&oldestPreviousVersion=1.12.3.4973-215c28d86&version=7814ac9-1285
May 06, 2018 19:13:21.863 [0xe83ffb70] DEBUG - HTTP 200 response from GET https://plex.tv/api/codecs/h264_decoder?build=linux-synology-i686&deviceId=a4bae751-0362-44e0-acf4-f8f47d6677b8&oldestPreviousVersion=1.12.3.4973-215c28d86&version=7814ac9-1285
May 06, 2018 19:13:21.863 [0xe83ffb70] DEBUG - HTTP requesting GET https://downloads.plex.tv/codecs/7814ac9-1285/linux-synology-i686/libh264_decoder.so
May 06, 2018 19:13:34.287 [0xf0111b70] DEBUG - handleStreamRead code 335544539: short read
May 06, 2018 19:13:34.481 [0xf03ffb70] DEBUG - Auth: authenticated user 1 as myhcloud
May 06, 2018 19:13:34.481 [0xeb3ffb70] DEBUG - Request: [192.168.1.237:55905 (Subnet)] GET /player/proxy/poll?deviceClass=pc&protocolVersion=1&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (5 live) TLS GZIP Signed-in Token (myhcloud)
May 06, 2018 19:13:34.481 [0xeb3ffb70] DEBUG - Beginning read from two-way stream.
May 06, 2018 19:13:42.955 [0xe7bffb70] DEBUG - Request: [127.0.0.1:43469 (Loopback)] GET /library/changestamp (6 live) GZIP Signed-in Token (myhcloud)
May 06, 2018 19:13:42.955 [0xf03ffb70] DEBUG - Completed: [127.0.0.1:43469] 200 GET /library/changestamp (6 live) GZIP 0ms 463 bytes
May 06, 2018 19:13:54.483 [0xf03ffb70] DEBUG - handleStreamRead code 335544539: short read
May 06, 2018 19:13:54.665 [0xf03ffb70] DEBUG - Auth: authenticated user 1 as myhcloud
May 06, 2018 19:13:54.665 [0xeb3ffb70] DEBUG - Request: [192.168.1.237:55914 (Subnet)] GET /player/proxy/poll?deviceClass=pc&protocolVersion=1&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (5 live) TLS GZIP Signed-in Token (myhcloud)
May 06, 2018 19:13:54.666 [0xeb3ffb70] DEBUG - Beginning read from two-way stream.
May 06, 2018 19:14:14.668 [0xf0111b70] DEBUG - handleStreamRead code 335544539: short read
May 06, 2018 19:14:14.856 [0xf03ffb70] DEBUG - Auth: authenticated user 1 as myhcloud
May 06, 2018 19:14:14.857 [0xe7bffb70] DEBUG - Request: [192.168.1.237:55923 (Subnet)] GET /player/proxy/poll?deviceClass=pc&protocolVersion=1&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (5 live) TLS GZIP Signed-in Token (myhcloud)
May 06, 2018 19:14:14.857 [0xe7bffb70] DEBUG - Beginning read from two-way stream.
May 06, 2018 19:14:14.966 [0xe83ffb70] ERROR - Error issuing curl_easy_perform(handle): 28
May 06, 2018 19:14:14.966 [0xe83ffb70] DEBUG - HTTP simulating 408 after curl timeout
May 06, 2018 19:14:14.966 [0xe83ffb70] ERROR - Codecs: Download failed: Failed to download 'https://downloads.plex.tv/codecs/7814ac9-1285/linux-synology-i686/libh264_decoder.so': 408
May 06, 2018 19:14:14.966 [0xe83ffb70] ERROR - Error configuring transcoder: Decoder install failed: h264
May 06, 2018 19:14:14.966 [0xe83ffb70] DEBUG - Streaming Resource: Terminated session 0xe9e13194:nqni3pvso9q1shkfx5b9hmjg with reason Conversion failed. A required codec could not be found or failed to install.
May 06, 2018 19:14:14.966 [0xea3ffb70] DEBUG - Killing job.
May 06, 2018 19:14:14.966 [0xea3ffb70] DEBUG - Job was already killed, not killing again.
May 06, 2018 19:14:14.966 [0xea3ffb70] DEBUG - Stopping transcode session tv7lx5n5gd9gb4jr2jo5ck9a
May 06, 2018 19:14:14.967 [0xe8bffb70] DEBUG - Cleaning directory for session tv7lx5n5gd9gb4jr2jo5ck9a (/volume1/Plex/Library/Application Support/Plex Media Server/Cache/Transcode/Sessions/plex-transcode-tv7lx5n5gd9gb4jr2jo5ck9a-9b30a874-a750-41a0-8155-ec7939c7fde9)
May 06, 2018 19:14:14.967 [0xf03ffb70] DEBUG - Completed: [192.168.1.237:55899] 404 GET /video/:/transcode/universal/start.mpd?hasMDE=1&path=%2Flibrary%2Fmetadata%2F1&mediaIndex=0&partIndex=0&protocol=dash&fastSeek=1&directPlay=0&directStream=1&subtitleSize=100&audioBoost=100&location=lan&addDebugOverlay=0&autoAdjustQuality=0&directStreamAudio=1&mediaBufferSize=102400&session=tv7lx5n5gd9gb4jr2jo5ck9a&subtitles=burn&Accept-Language=zh (5 live) TLS GZIP 55815ms 452 bytes (pipelined: 1)
May 06, 2018 19:14:15.031 [0xea3ffb70] DEBUG - Transcoder: Cleaning old transcode directories.
May 06, 2018 19:14:15.031 [0xea3ffb70] DEBUG - Whacked session tv7lx5n5gd9gb4jr2jo5ck9a, 0 remaining.
May 06, 2018 19:14:16.038 [0xf0111b70] DEBUG - Auth: authenticated user 1 as myhcloud

i have a lot of shows on my plex and most of the time when i add a file or a folder plex automatically adds it without problems. but i have a show of which i want to add a fourth season but whatever i do, plex doesn't want to add. i renamed everything just as specified. S04E01. the format is mkv so plex should be able to handle this. i also put the mkv through handbrake. i put al lot of episodes through handbrake when they are too big for my taste but plex Always recognizes them without error. i put the folder in and out a couple of times. added a new folder, renamed it and then added the files. take the entire show out, erase trash can and then put it back in but then it only sees three seasons. so whatever i do, plex sees that i have added something, scans the directories and doesn't add a thing and stops again. what can i do???

Plex is currently loaded on my DS916 Synology NAS and I want to move all of the Metadata to a local SSD drive
I don't mind re-loading my library from scratch if I have too. The location does not show up in advanced as it does on a windows setup

Thanks

Hi,

i try to install PlexMediaServer-1.12.3.4973-215c28d86-x86_64 on my Syno DS 415+, DSM ist aktuell.
When i Try to install it will seems to start install, after 15 minutes there ist noc change in the Message there stand only " Verarbeitung läuft"
Maybe someone can give me an advise?
Thx Kaz

hi plex team,
i have a constant problem after update of my synology 415+ with PMS. it keeps stopping after few minutes. log files included. thank you for help

Hey guys,

I recently switched to a DS918+, which I love! I tried to get my setup running again so I installed Plex, JDownloader, FileBot, filled up my media libraries...

My problem is a bit tricky and I know it's not directly related to Plex itself, but I don't know where to ask instead. JDownloader triggers an event script to start FileBot and rename my media. That works fine. The owner of the downloaded files is root and the permissions are for the admin group to have read/write permissions. But when FileBot moves the renamed file to the media folder, the moved file is still owned by root, but it's permissions are gone. So as one would expect, Plex can't find and add these files to the library.

Did anyone of you ever experienced a similar problem? Any help yould be appreciated!

Greetings,
Cola

Hi,

any chance that you will publish a plex pass repo for synology devices so we can use DSM auto update?

Kind regards,
Peter

My 916 is on DSM 6.1.4-15217 Update 5
My plex is on Version 1.10.1.4602

I was sure that the Synology supported Hardware Transcoding, my shield does but I am having issues with that so swapped over to the synology as my PMS but where there should be a tick box option (where there is one on the shield) there is just no option on the Synology.
Thanks again

Ryan