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OMV - Can't play anything: Error starting FFMPEG, access denied


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I have recently installed the Emby plugin on Open Media Vault however I'm not able to play a show I wish to watch. This is the error I can locate on the logs when I try:

2015-08-10 02:45:19.4810 Error - App: Error starting ffmpeg
*** Error Report ***
Version: 3.0.5675.1
Command line: /opt/emby/MediaBrowser.Server.Mono.exe -programdata /media/c1a0b79e-e049-4412-8668-c1963a2b91db/emby -restartpath /usr/sbin/emby.sh
Operating system: Unix
Processor count: 4
64-Bit OS: True
64-Bit Process: True
Program data path: /media/c1a0b79e-e049-4412-8668-c1963a2b91db/emby
Mono: 4.0.2 (Stable Wed Jun 24 10:04:37 UTC 2015)
Application Path: /opt/emby/MediaBrowser.Server.Mono.exe
ApplicationName='/media/c1a0b79e-e049-4412-8668-c1963a2b91db/emby/ffmpeg/20150331/ffmpeg', CommandLine='-fflags +genpts -i file:"/media/c1a0b79e-e049-4412-8668-c1963a2b91db/TV/Halt and Catch Fire/Season 2/Halt and Catch Fire - S02E06 - 10Broad36 HDTV-720p.mkv" -map_metadata -1 -threads 0 -sn -codec:v:0 libx264 -pix_fmt yuv420p -preset superfast -crf 23 -maxrate 1372000 -bufsize 2744000 -vsync vfr -profile:v high -level 41 -force_key_frames expr:gte(t,n_forced*3) -vf "scale=min(iw\,1280):trunc(ow/dar/2)*2" -sc_threshold 0 -codec:a:0 aac -strict experimental -ac 2 -ab 128000 -af "adelay=1,aresample=async=1" -hls_time 3 -start_number 0 -hls_list_size 0 -hls_base_url "hls/bd799cf6dcb5f00bc1f6449a42b42c5c/" -y "/media/c1a0b79e-e049-4412-8668-c1963a2b91db/emby/transcoding-temp/bd799cf6dcb5f00bc1f6449a42b42c5c.m3u8"', CurrentDirectory='', Native error= Access denied
at System.Diagnostics.Process.Start_noshell (System.Diagnostics.ProcessStartInfo startInfo, System.Diagnostics.Process process) [0x00000] in <filename unknown>:0 
at System.Diagnostics.Process.Start_common (System.Diagnostics.ProcessStartInfo startInfo, System.Diagnostics.Process process) [0x00000] in <filename unknown>:0 
at System.Diagnostics.Process.Start () [0x00000] in <filename unknown>:0 
at (wrapper remoting-invoke-with-check) System.Diagnostics.Process:Start ()
at MediaBrowser.Api.Playback.BaseStreamingService+<StartFfMpeg>d__17.MoveNext () [0x00000] in <filename unknown>:0

It repeats this same error multiple times for some reason.

I have had no problems using Plex Media Server to play media files, so I went to the /etc/init.d/emby.conf file and replaced the user and usergroup fields with plex so it would run under the same user. I still have the same issue.

Does anyone have any suggestions?
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Tekkb is on this forum also? He's been helping me over on the OMV forums :)


He's offered a suggestion I'll give a go when I get home. I will post the solution when I find it for historic reasons in case others come across this error.

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