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Roku doesnt work with Plex but evetything else does

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I am on the latest Plex release and I did all the suggestions on the faq for ffmpeg and audio. http://lime-technology.com/wiki/index.php/Plex_for_UnRAID_FAQ

I downloaded the alsa library and put it where it said but no matter what I do, my movies (HD) play about 5 seconds then the audio cuts out and video continues then when I hit stop the whole roku locks up and requires a reboot.  Am I missing something?  I am using the Roku plugin to install.  I followed the install guide here http://forums.plexapp.com/index.php/topic/42513-0963-for-unraid/ using the latest ROKU build from here http://plex.r.worldssl.net/PlexMediaServer/0.9.7.11.386-d353989/PlexMediaServer-0.9.7.11.386-d353989-unRAID.txz

 

Any ideas why this is happening?  It works fine on my ipad and computer.

  • Author

Found the fix from aross01 in case anyone else has this issue:  From the plex forums

 

User is offline  aross01    Posts:  2    Joined: 20-August 12    Group: Members 

 

Posted 14 January 2013 - 10:41 PM

 

Audio drops, video continues, exiting out leaves a black screen? Only way out is to power off the unit physically.

Sometimes if you wait after 10-20 min it might return to the roku main screen.

 

This is my workaround.

And no I don't change any roku options it stays on 5.1 surround sound.

 

Plex Media Server 0.9.7.9.376-48ee3bb

Linux (#55-Ubuntu SMP Wed Dec 5 17:42:16 UTC 2012)

 

Plex for Roku 2.5.5

Roku 2 XS

Roku 4.9 build 5060

 

I have a video file with Dolby Digital 3/2.1 audio output.

It seems when that audio is passed from plex server to the Roku you crash and burn.

 

What to Change in Roku Plexapp go to:

Miscellaneous

Preferences

Advance preferences

Audio boost:None

 

Change the Audio boost:Small

What this does

The Roku Plex App will then output PCM 44.1 Khz audio

 

No More crashing everything plays

and you still keep your 5.1 Surround on your Roku.

 

Try it out.

 

 

Notes

Dolby Digital 3/2.1 = 5.1

The first number is "3/2.1" refers to the number of front channels.

Second is surround, or rear channels.

The ".1" refers to the subwoofer.

"3/2.1" is the same as "5.1", and "2/0.0" is the same as "2.0"."

 

PCM 44.1 Khz audio old format was 2.0 stereo but standard change can now carry 5.1 audio:

Linear PCM 5.1 Ch. 44.1 kHz

 

Will let you know what I get when my Audio Calibration DVD gets in.

That will allow me to test each 5.1 channel one at a time.

 

The problem seems to be in the encoding of the audio track the roku reprocessing the audio track for some reason and not just letting it pass thru

by setting the audio boost you are changing the audio during the reprocessing from from Dolby Digital 3/2.1 audio to Linear PCM 5.1 Ch. 44.1 kHz the roku seems to like that and lets it pass thru.

 

The reason I want the Audio Calibration DVD as I will be able to test and recreate each type of audio input and verify what the roku is putting out.

Once I have that I will be able test what part(s) of the audio stream is causing the crash I can't do that what a general video file.

GIGO - Garbage in Garbage Out

 

 

*******************************

Follow up

Made sure that in Plex advanced preferences

5.1 Support: Enabled

Audio boost: Small

 

And reboot your roku box after the change

 

And if it still crashing you need to set

Direct Play:Always Transcode

It may take longer to load your video if you have a lot of 1080p video like I do

 

 

Note 2.

Debuging the Roku it looks like roku has changed how it processes Dolby_Digital 44.1khz when they added Dolby_Digital_Plus 192khz audio

In the past the Plex audio could just be passed thru to your receiver and be decoded by your TV or receiver

It looks like that may no longer be a option with the Roku

The roku box does not want to pass this audio on untouched so the audio must be decoded before it gets to the roku or by the roku application processing the recording.

 

Also point of clarity: the audio boost is not "converting" or "resampled" to LPCM. It's just being decoded on the roku.

It isn't being downsampled or downmixed or anything.

It's whatever res that is (including lossless and high-res lossless from video source).

 

Why do I still crash and burn after selecting audio boost.

When direct play is set to auto some of your video could be sent to the roku unchanged i.e. no audio boost = no audio decoding.

 

If you are still having problems please go to your myplex page and post your device and server info I don't work for plex but I love debuging the roku.

i have connected unraid and crashplan to my computer but like the first poster it looks like I have to have this silly 2nd computer as a tunnel to the internet using putty.  What i think he was asking and what I am too is can this be done directly from unraid?!  No man in the middle needed?

  • 7 months later...

ffmpeg always go wrong, why not try other tools to convert HD video, there are many freeware also, Handbrake and Freemake are all good selection, completely free and no other cost. Handbrake has both windows and Mac version. best solution for convert MTS to mov for all users. and some rechargeable software such as iVideotool Video converter(http://www.ivideotool.com) may much better for converting and compress videos

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