I know it should be able to - I've used it with MythTV with this HD Homerun Prime.
I posted on a SageTV forum about it and I am now under the understanding that the docker I'm using lets SageTV do the remuxing, which it apparently isn't great at if the stream is poorly constructed (which is common from some cable companies, apparently). He suggested that I make some settings changes that will use FFmpeg for this function instead, and that I should have a better experience with that....
And I did go ahead and get a copy of
MediaInfo, and here is what it says about one of these files:
General
Complete name : /Volumes/media/SageTV/recordings/tv/TheMiddle-S08E22-TheFinalFinal-352633-0.ts
Format : MPEG-PS
File size : 2.34 GiB
Duration : 33mn 58s
Overall bit rate mode : Variable
Overall bit rate : 9 871 Kbps
Movie name : Extra
Law rating : TV-PG (L)
FileExtension_Invalid : mpeg mpg m2p vob pss evo
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : M=3, N=30
Duration : 33mn 58s
Bit rate mode : Variable
Bit rate : 9 163 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Active Format Description : Letterbox 16:9 image
Frame rate : 59.940 (60000/1001) fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.166
Time code of first frame : 03:28:28:30
Time code source : Group of pictures header
GOP, Open/Closed : Open
Stream size : 2.17 GiB (93%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio #1
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Format settings, Endianness : Big
Muxing mode : DVD-Video
Duration : 33mn 58s
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
Frame rate : 31.250 fps (1536 spf)
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -393ms
Stream size : 93.3 MiB (4%)
Service kind : Complete Main
Audio #2
ID : 189 (0xBD)-129 (0x81)
Format : AC-3
Format/Info : Audio Coding 3
Format settings, Endianness : Big
Muxing mode : DVD-Video
Duration : 33mn 58s
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 1 channel
Channel positions : Front: C
Sampling rate : 48.0 KHz
Frame rate : 31.250 fps (1536 spf)
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -465ms
Stream size : 31.1 MiB (1%)
Service kind : Visually Impaired
Text #1
ID : 224 (0xE0)-CC1
Format : EIA-608
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 33mn 58s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
CaptionServiceName : CC1
Text #2
ID : 224 (0xE0)-CC3
Format : EIA-608
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 33mn 58s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
CaptionServiceName : CC3
Text #3
ID : 224 (0xE0)-1
Format : EIA-708
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 33mn 58s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
Text #4
ID : 224 (0xE0)-2
Format : EIA-708
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 33mn 58s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)