Have had a bit more time to follow-up on some good advice here, using Ext2FSD I added an ext3 partition on my Windows 7 hard drive - which enabled me to access the Humax videos on my LaCie Rikiki USB hard drive.
As suggested I used MediaInfo to get info from this short Family Guy (SD) .ts video as an example of the files I cannot play on the WD TV Live… as I pointed out on my preceding post it seems even the SD videos are encoded, although I don’t know if the following confirms that…
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General
ID : 4173 (0x104D)
Complete name : G:\Family Guy_20110508_0257.ts
Format : BDAV
Format/Info : Blu-ray Video
File size : 389 MiB
Duration : 21mn 3s
Overall bit rate : 2 581 Kbps
Video
ID : 301 (0x12D)
Menu ID : 4288 (0x10C0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=24
Codec ID : 2
Duration : 21mn 3s
Bit rate mode : Variable
Bit rate : 2 212 Kbps
Nominal bit rate : 15.0 Mbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
ActiveFormatDescription : Letterbox 16:9 image, with alternative 14:9 center
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.213
Stream size : 333 MiB (86%)
Audio
ID : 302 (0x12E)
Menu ID : 4288 (0x10C0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 21mn 3s
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : -264ms
Stream size : 38.6 MiB (10%)
Language : English
Text
ID : 305 (0x131)
Menu ID : 4288 (0x10C0)
Format : DVB Subtitle
Codec ID : 6
Language : English
Menu
ID : 300 (0x12C)
Menu ID : 4288 (0x10C0)
Duration : 21mn 3s
List : 301 (0x12D) (MPEG Video) / 302 (0x12E) (MPEG Audio, English) / 305 (0x131) (DVB Subtitle, English)
Language : / English / English