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Does PLEX support H/W Acceleration for transconding?

neatneat Posts: 2Members

Hello.

 

I am a Asustor AS-302T  user and I know AS-302T has an Intel Atom CE5335 CPU with enhanced H/W support for transcoding.

Also I was told that CE5300 series could transcode 1080p on the fly.

 

Does Plex transcode 1080p with this H/W acceleration?

 

Thanks.

 

 

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Comments

  • tobiashietatobiashieta Plex Dev Team Posts: 5,525Members, Plex Employee, Plex Pass, Plex Ninja Plex Employee

    No.

  • neatneat Posts: 2Members

    Then, is there any plan for it?

    As I know, Not only just Asustor, but also Synology, Thecus have new NAS line ups with Atom CE5300 series .

    I wish Plex support H/W Acceleration for transcoding someday.

    Thanks. 

  • tobiashietatobiashieta Plex Dev Team Posts: 5,525Members, Plex Employee, Plex Pass, Plex Ninja Plex Employee

    Let's just say that it's not that easy. First the support has to hit FFMPEG and then we have to make some kind of detection and then it actually needs to help us. So it's a long road, but we are definitely keeping our eyes open for it.

  • braaambraaam Posts: 6Members, Plex Pass
    edited September 2013

    This review mentions succesful 1080p transcoding with the AS-302T

    Using the Plex app I was able to quickly and smoothly transcode 1080p video to my iPad.  Although achievable on previous Atom Powered nas enclosures, the new chip made it noticeably faster and smoother.  To further test it I also started streaming to my iPhone.  This is where the chip shines and it handle multiple streams being transcoded simultaneously with ease.

  • tobiashietatobiashieta Plex Dev Team Posts: 5,525Members, Plex Employee, Plex Pass, Plex Ninja Plex Employee
    Yeah it should probably work fine on low bitrate stuff.
  • braaambraaam Posts: 6Members, Plex Pass
    edited September 2013
    Tobias Hieta wrote on September 23 2013, 4:31 AM: »

    Yeah it should probably work fine on low bitrate stuff.

    I can definitely confirm that the AS-302T is currently NOT capable of realtime transcoding high resolution material with PLEX. Tried to play the file below on my iPhone 4s on a local network and transcoding was about half speed.

    MEDIA

    Video Resolution 1080p Duration 43:01 Bitrate 8140 kbps Width 1920 Height 1080 Aspect Ratio 1.78 Container MKV Video Frame Rate NTSC FILE Accessible Yes Exists Yes Duration 43:01 File **** Size 2.45 GB Container MKV VIDEO Codec H264 Bitrate 7500 kbps Language English Bit Depth 8 CABAC 1 Chroma Subsampling 4:2:0 Color Space yuv Duration 43:01 Frame Rate 29.970 fps Frame Rate Mode cfr Has Scaling Matrix 0 Height 1080 Level 4.0 Profile high Ref Frames 4 Scan Type progressive Width 1920 AUDIO Codec AC3 Channels 5.1 Bitrate 640 kbps Bit Depth 16 Bitrate Mode CBR Dialog Norm -27 dB Duration 43:01 Sampling Rate 48000 Hz
  • kroplingkropling Posts: 12Members ✭✭

    What about a standard 720p movie? Would you be kind to try that out? Looking to buy in to the 6-series asustor if it can handle it. Thanks :)

  • tobiashietatobiashieta Plex Dev Team Posts: 5,525Members, Plex Employee, Plex Pass, Plex Ninja Plex Employee
    norse wrote on September 26 2013, 7:21 AM: »

    What about a standard 720p movie? Would you be kind to try that out? Looking to buy in to the 6-series asustor if it can handle it. Thanks :)

    It's a atom processor, so it should handle 720p with some marginal, low bitrate 1080p should also be fine. but when you go over ~5mbps you might be screwed :)

  • braaambraaam Posts: 6Members, Plex Pass
    edited September 2013
    norse wrote on September 26 2013, 7:21 AM: »

    What about a standard 720p movie? Would you be kind to try that out? Looking to buy in to the 6-series asustor if it can handle it. Thanks :)

    I'll do some more testing tonight, will let you know the outcome here. 

  • braaambraaam Posts: 6Members, Plex Pass
    edited September 2013

    Tested a 720p file:

    • original settings: 3047kbps@720p
    • target settings on iphone: 4mbit@720p

    With the universal transcoder on it does hiccup at these settings (all 4 cores are used at max). With the universal transcoder off it doesn't break a sweat (hardly any cpu use).

    Can anyone explain why there's such a big difference there?

  • kroplingkropling Posts: 12Members ✭✭

    Thanks for testing!

    My Samsung TV(for example) support 99% of my mkvs by default. That means I do not have to transcode anything to get it working, and I can stream 1080p as long as my internet is fast enough. My iPhone do not support mkvs by default and need them transcoded by the server to a format that the iPhone can view, this does take a lot of processing power and it will be up to the server if it is strong enough.

  • tobiashietatobiashieta Plex Dev Team Posts: 5,525Members, Plex Employee, Plex Pass, Plex Ninja Plex Employee

    Tested a 720p file:

    original settings: 3047kbps@720ptarget settings on iphone: 4mbit@720p With the universal transcoder on it does hiccup at these settings (all 4 cores are used at max). With the universal transcoder off it doesn't break a sweat (hardly any cpu use).

    Can anyone explain why there's such a big difference there?

    Sounds like they made different decisions on how to handle the file. If you shutdown PMS, start it, play with both transcoders in a row and then send me the log I can tell you why.
  • braaambraaam Posts: 6Members, Plex Pass
    edited October 2013
    Tobias Hieta wrote on September 27 2013, 6:00 AM: »

    Sounds like they made different decisions on how to handle the file. If you shutdown PMS, start it, play with both transcoders in a row and then send me the log I can tell you why.

    Tobias, thanks for looking into this: attached are the seperate logs. 'universal' has the universal transcoder option turned on.

    I did some more testing today with another 720p MKV, it didn't fare well with both transcoding options. It transcoded the video at around 70% of the playback speed on my iphone 4s. Below is the media info from plex: 

    MEDIA Video Resolution 720p Duration 47:14 Bitrate 4440 kbps Width 1280 Height 720 Aspect Ratio 1.78 Container MKV Video Frame Rate 24p FILE Accessible Yes Exists Yes Duration 47:14 File ---- Size 1.46 GB Container MKV VIDEO Codec H264 Bitrate 3968 kbps Language English Bit Depth 8 CABAC 0 Chroma Subsampling 4:2:0 Color Space yuv Duration 47:14 Frame Rate 23.976 fps Frame Rate Mode cfr Has Scaling Matrix 1 Height 720 Level 3.1 Profile high Ref Frames 2 Scan Type progressive Width 1280 AUDIO Codec AC3 Channels 5.1 Bitrate 384 kbps Language English Bit Depth 16 Bitrate Mode CBR Dialog Norm -27 dB Duration 47:14 Sampling Rate 48000 Hz SUBTITLES Format SRT
  • elysiumcoreelysiumcore Posts: 3Members

    On the Asustor 602t I was able to play 2 streams from the nas to my ipad air and macbook pro at the same time. At these settings, the cpu monitor shows spikes near 100% while memory is almost full. I am thinking of buying the extra 2 gigs of ram, I don't think i will be decoding more than 2 streams, but this Nas rocks! 

    • Video Resolution 1080p

      Duration 2:19:08

      Bitrate 13211 kbps

      Width 1920

      Height 800

      Aspect Ratio 2.35

      Container MKV

      Video Frame Rate 24p

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