Plex on ReadyNAS Pro

StephenB,
Thanks for the suggestion.
Update: the Roku Plex channel will stream all the videos although there is extreme pixelation specifically in the blacks. In addition, the Disney trailer (Cinderella's castle, fireworks, etc) looks like it is being shown on a CRT and not on a HDTV supporting 1080p. My Sony player will not play any Mpeg rip created from MakeMKV - will display the name of the file (e.g. Bee Movie) and then say Corrupt or Unsupported file. I am checking the Sony boards for this one.

Here is the MediaInfo results for Cars2, created using MakeMKV from the DVD version on an iMac (Intel Core2 Duo).

Thanks again!

General
Unique ID : 13830129799792433122549771815514523764 (0xA67960B69382FD411098A616D8BC874)
Complete name : /Volumes/media-1/Videos/Movies MKV and Streaming/Cars 2/Cars 2.mkv
Format : Matroska
Format version : Version 2
File size : 4.44 GiB
Duration : 1h 46mn
Overall bit rate mode : Variable
Overall bit rate : 5 978 Kbps
Encoded date : UTC 2012-03-04 20:13:25
Writing application : MakeMKV v1.7.1 darwin(x86-release)
Writing library : libmakemkv v1.7.1 (1.2.0/1.1.0) darwin(x86-release)

Video
ID : 1
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Custom
Codec ID : V_MPEG2
Codec ID/Info : MPEG 1 or 2 Video
Bit rate mode : Variable
Bit rate : 5 283 Kbps
Maximum bit rate : 9 800 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Original frame rate : 29.970 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Scan order : Top Field First
Compression mode : Lossy
Time code of first frame : 00:59:58:05
Time code source : Group of pictures header
Language : English
Default : Yes
Forced : No
Color primaries : BT.601 NTSC
Transfer characteristics : BT.601
Matrix coefficients : BT.601

Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 1h 46mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 292 MiB (6%)
Title : 3/2+1
Language : English
Default : Yes
Forced : No

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 1h 46mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 146 MiB (3%)
Title : 2/0
Language : English
Default : No
Forced : No

Menu
00:00:00.000 : en:Chapter 01
00:01:30.090 : en:Chapter 02
00:04:48.488 : en:Chapter 03
00:07:44.497 : en:Chapter 04
00:12:08.728 : en:Chapter 05
00:17:49.768 : en:Chapter 06
00:20:02.150 : en:Chapter 07
00:22:52.371 : en:Chapter 08
00:26:35.460 : en:Chapter 09
00:30:30.995 : en:Chapter 10
00:32:42.794 : en:Chapter 11
00:34:14.385 : en:Chapter 12
00:37:16.400 : en:Chapter 13
00:40:44.975 : en:Chapter 14
00:42:54.071 : en:Chapter 15
00:46:19.443 : en:Chapter 16
00:46:58.982 : en:Chapter 17
00:49:49.353 : en:Chapter 18
00:53:57.234 : en:Chapter 19
00:54:58.094 : en:Chapter 20
00:57:37.287 : en:Chapter 21
00:59:28.565 : en:Chapter 22
01:02:17.767 : en:Chapter 23
01:05:57.119 : en:Chapter 24
01:12:32.681 : en:Chapter 25
01:14:06.775 : en:Chapter 26
01:15:25.020 : en:Chapter 27
01:21:13.869 : en:Chapter 28
01:23:23.331 : en:Chapter 29
01:29:08.009 : en:Chapter 30
01:31:49.170 : en:Chapter 31
01:32:42.056 : en:Chapter 32
01:38:19.426 : en:Chapter 33