Quick Guide for V@Box with Mythtv

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MikeB
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Joined: Tue Feb 21, 2017 8:30 pm
Location: UK

Quick Guide for V@Box with Mythtv

Post by MikeB » Mon Feb 27, 2017 6:38 pm

Quick Guide for V@Box with Mythtv

1. Background

The orignal V@Box support provided in Mythtv version 0.28 allowed one recording per V@Box tuner.

With recents updates to Mythtv master (version 0.29pre) it is now possible to make use of Mythtv multirec feature which allows multiple channels on the same tuner, provided channels are on the same multiplex, to be recorded/watched.

Note that this configuration requires use of external xmltv program data source for each V@Box tuner type (DVB-T, DVB-T/T2, DVB-S, DVB-S/S2). The external xmltv program data is stored within Mythtv, so the V@Box external xmltv capability is not used.

2. V@Box Setup

There is not much setting up of V@Box for use with Mythtv that is different from normal V@Box setup.

a) Configure V@Box to use a fixed IP address (can be done on V@Box or via Router Reservation)
b) Make sure V@Box has minimum firmware version 2.56
c) Make sure "* Limit single channel streaming per UPnP device" is NOT selected.

3. Mythtv Setup

The Mythtv-setup process is similar to that used in current release 0.28/fixes,but with a few minor, but important, changes to account for Mythtv Max Recordings setting (multirec) see Notes below.

The following steps assume a clean install of Mythtv master (from either the appropriate PPA or built from source) and that the V@Box has been setup to a) use a fixed IP address, b) all channels have been setup.

Note Max Recordings on the Input Connections screen should not be set higher than 5, settings higher than 5 can cause V@Box overload and thus lead to lost/missed recordings.

Stop mythbackend if running
run mythtv-setup

WARNING Do NOT share Video Sources for V@Boxes with other Capture Card types.

a) Capture Card Screen
Create New Capture Card

b) Video Sources Screen
Create New Video Source

c) Input Connections
Remember to scan for channels (only needs to be done once per Video Source
on Input Connections screen set Max Recordings to 5,

4. Mythtv Tuner is Errored

If you see "errored" in the mythfrontend Tuner status screen, this is due to the V@Box not responding to a network ping within 7 seconds (default value). This can be caused by number of things:

V@Box is not running - check by going to V@Box management page in a web browser, if the V@Box main screen is displayed it means the V@Box is likely not the problem.

Other possible causes: cabling or mythbackend starting up before networking has been established.

5. Notes

5.1 What has been tested.

The multirecord using V@Box has been tested on Mythbuntu 16.04 X86-64 using
V@Box XTi 3442 Dual tuner DVB-T/T2 running firmware VJ2.56
V@Box XTi 3440 Dual tuner DVB-T, single DVB-S, single DVB-S2 running firmware VB2.56

All V@Boxes were using UK Freeview (DVB-T/T2) or UK Freesat (DVB-S/S2) as appropriate for the V@Box.

External xmltv program data from Schedules Direct was used, using tv_grab_zz_sdjson (requires xmltv version 0.5.69 or greater).

Note that multirec is very useful for UK Freeview where multiple channels are on the same multiplex, less so for UK Freesat due to allocation of channels to transponders(multiplexes).

5.2 V@Box XTi 3340

The version tested (Product Number 3345, Product Name 3345-21) has DVB-T capability on 2 tuners, DVB-S on 2 tuners and DVB-S2 on one tuner, so configuring for Mythtv was done in the following manner to minimise the single DVB-S2 tuner being used unless it is really needed for a particular channel. Firmware version VB2.56

WARNING Do NOT share Video Sources for V@Boxes with other Capture Card types.

Create Capture Card for Tuner 4 (DVB-T)
Create Video Source for DVB-T, this is used for tuners 3 and 4
Setup Input Connections for Tuner 4, setting Max Recordings to 5

Create Capture Card for Tuner 3 (DVB-T)
Setup Input Connections for Tuner 3, setting Max Recordings to 5

Create Capture Card for Tuner 2 (DVB-S)
Create Video Source for DVB-S
Setup Input Connections for Tuner 2, setting Max Recordings to 5

Create Capture Card for Tuner 1 (DVB-S/S2)
Create Video Source for DVB-S2
Setup Input Connections for Tuner 1, setting Max Recordings to 5

5.3 V@Box XTi 3442

The version tested (Product Number 3442 Poduct Name 3442-21) has DVB-T/T2 capability on both tuners. Firmware version VJ2.56

WARNING Do NOT share Video Sources for V@Boxes with other Capture Card types.

Create Capture Card for Tuner 1 (DVB-T/T2)
Create Video Source for DVB-T/T2, this is used for tuners 1 and 2
Setup Input Connections for Tuner 1, setting Max Recordings to 5

Create Capture Card for Tuner 2 (DVB-T/T2)
Setup Input Connections for Tuner 2, setting Max Recordings to 5

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