Setup General

Backend

MythTV Detailed Backend Configuration v. 0.18.1. (Incomplete)

MythTV Backend

The backend process (mythbackend) is the portion of the system that handles the Video Capture Cards as well as Scheduling Recordings on those cards, Commercial Flagging, and transcoding. The backend process interacts with the Database primarily.

As with the MythFrontend, there can be multiple backends. One backend process is designated as the master backend. This is usually the first backend installed on a system. This backend is responsible for coordinating the activities of the other backends known as slaves. This is especially true for scheduling as the master backend will determine the best distribution of programs across all available tuners. Each backend can have any number of tuners, including zero. As of 0.16, Commercial Flagging can be distributed across different backends, thereby spreading the load of that process.

There is no requirement for direct user interaction with the backend. The backend can use local HardWare/File Storage or have it mounted from another system. If remotely mounted, network performance should be considered as there will be considerable traffic on the network as recordings are stored and retreived by the backend process.

Communications Protocol

The backend and frontend communicate using their own Myth Protocol. The developer of Win Myth, a windows frontend to MythTV for playing recordings on Windows, has documented his workings on the procotol here. Work on defining the Myth Protocol is also be performed on this Wiki.

Backend Configuration

The MythTV Backend configuration has two main objectives

• Tell MythTV what TV Capture/Tuner cards to use
• Populate the Myth Database with information about channels and tuning information

There are additional items that can be configured, but without successfully achieving the above two steps you will not be able to get Live TV.

Backend Configuration

Configure the Myth backend like so

> mythtv-setup

The system will now prompt to see if you want to keep the current TV card settings as well as the channel information.

Once configuration is done you can test to see if the mythbackend process is running correctly by starting it in a Terminal window:

> mythbackend

Watch out for any error messages.

Backend Reference

Host Address Backend Setup

IP address for mythtv

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Port the server runs on:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Port the server shows status on:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Master Server IP address:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Port the master server runs on:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Host-specific Backend Setup

Directory to hold recodings:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Directory to hold the Live-TV buffers:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Live TV Buffer (GB):

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Minimum free Live TV Buffer:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Save original files after transcoding

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Global Backend Setup

TV format:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

VBI format:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Channel frequency table:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Time offset for XMLTV listings:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Master Backend Override

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Follow Symbolic links when deleting files

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Shutdown/Wakeup Options

Block Shutdown before client connected

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Idle timeout (secs):

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Max wait for recording (min):

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Startup before rec. (secs):

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Wakeup time format:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Set wakeuptime command

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Server halt command:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject

Pre Shutdown check-command:

Default Setting	PUT IN THE DEFUALT HERE
On Page Description	Copy the description on the page Here
Detailed Description and Comments	This is the meat of the subject