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I have Synology ds218+ Nas,
Before purchasing Plex pass (and using hardware transcode) I want to know if my Nas can stand what I need, I’ll mostly have maybe Round 3-4 streams.
You will have no problems transcoding the video.
You’ll run out of CPU power transcoding audio before the hardware reaches its limit.
The biggest problem you will face are subtitles.
If you have no subtitles to burn-in, and are converting (maximum) 7.1 -> Stereo, you can expect 4 concurrent streams. If you are converting AC-3 -> AAC, you can probably get 6-8 out of it without much difficulty.
If the video is “DirectPlay” (no conversions required) then you can easily get 10+ (maybe 15) from it.
That’s doesn’t sound good so far…
Let’s see, absolutely always use subtitles,
Audio is mostly 6 channels 265 kb/s AAC but some are 2 channels (older files)
~ never knew I’d have more issues with audio than vid.
So with that + subtitles, it won’t have the power even for 3 transcoding/streams??
Again, vids mostly 1080P HEVC 265 2-3KBit.
Btw the nas has standard 2GB ram, would it help if I upgraded that for transcoding…?
What were you expecting from a J3355 ?
Haha unfortunately I was late, my first Nas I bought it for other means, and only later on I knew about Plex and such and so now am stuck with it wanting to use it for Plex.
I know about passmark but as I understand that works for software decode and it’d fare better with a hardware decode which is through plexPass. But couldn’t find any info on how many it can transcode through. My needs ain’t much (3 streams would make me happy)
And I can’t test that myself without buying Plex pass. .
You still get hardware decode and hardware encode of the video with the DS218+ and a PlexPass.
What none of us get, even with an i7-7700 or better, is hardware-anything (this is important) when the subtitles must be burned-into the image.
That’s important. There are two types:
Image based (PGS, VOBSUB, and DVRRIP by name) which must be burned in because nothing exists to overlay images on images (subtitles on video )
Text based images (SRT, ASS, and SSA) can be handled by almost all the players if the player asks for the 3rd stream (vido, audio, subtitle). The player does the painting on the TV. That’s easily done compared to image overlay
Intel never gave us the ability to burn in the images with the hardware. Theoretically, it can do it but no software exists to do it yet. Maybe someday? It will take someone at Intel or like that to write such software.
For you with the DS-218.
HEVC (H.265) or AVC (H.264) , Text based subtitles — easy peasy.
Audio transcoding is the simple “how much does it take to convert audio X -> Y”
There is a major limit also in the J3355 which is not in its big brother (J3455)
The J3355 won’t do UHD video. it will do 4K 8 bit/SDR but not 10 bit HDR.
You’d need the J3455 for that.
Some clients will play image based subs without transcoding. Apple TV and iOS supports PGS at least
Interesting… Never knew much at first unfortunately… might need to update my hardware eventually.
Thanks a lot for all the info.
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