Difference between revisions of "Femon-plugin"

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(Description)
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Shows DVB signal information on the OSD.
 
Shows DVB signal information on the OSD.
 
  --------------------------------------------------------------
 
  --------------------------------------------------------------
  |## Channel Name ######################### [DD][AR][VF][A][D]|
+
  |## Channel Name ########################## [AR][VF][A/DD][D]|
  |[==== Signal Strength in % ==============|=================]|
+
  |[=====Signal Strength in % ==============|=================]|
  |[==== Signal-to-Noise Ratio in % ========|=================]|
+
  |[=====Signal-to-Noise Ratio in % ========|=================]|
 
  | STR: #0000 (0%)      BER: #00000000      Video: 0 Mbit/s |
 
  | STR: #0000 (0%)      BER: #00000000      Video: 0 Mbit/s |
 
  | SNR: #0000 (0%)      UNC: #00000000      Audio: 0 kbit/s |
 
  | SNR: #0000 (0%)      UNC: #00000000      Audio: 0 kbit/s |
  | [LOCK]    [SIGNAL]    [CARRIER]    [VITERBI]    [SYNC] |
+
  | [LOCK]    [SIGNAL]    [CARRIER]    [VITERBI]    [SYNC] |
 
  --------------------------------------------------------------
 
  --------------------------------------------------------------
 
   
 
   
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  VITERBI - FEC (forward error correction) is stable
 
  VITERBI - FEC (forward error correction) is stable
 
  SYNC    - Found sync bytes
 
  SYNC    - Found sync bytes
 
+
   
  DD      - AC-3 stream (optional)
+
 
  AR      - Aspect Ratio: 1:1/4:3/16:9/2.21:1 (optional)
 
  AR      - Aspect Ratio: 1:1/4:3/16:9/2.21:1 (optional)
 
  VF      - Video format: PAL/NTSC (optional)
 
  VF      - Video format: PAL/NTSC (optional)
  A       - Audio track: 1..2 (optional)
+
  A/DD    - Audio (0..5) / AC-3 track (optional)
 
  D      - Device number: 0..3 (optional)
 
  D      - Device number: 0..3 (optional)
  
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|bgcolor=#efefef|Ok            || Switch between display modes: basic, transponder, stream, AC-3
 
|bgcolor=#efefef|Ok            || Switch between display modes: basic, transponder, stream, AC-3
 
|-
 
|-
|bgcolor=#efefef|Right/Left    || Switch to next/previous device that provides the current channel
+
|bgcolor=#efefef|Green        || Select next audio track
|-
+
|bgcolor=#efefef|Green        || Select language (APID)
+
 
|-
 
|-
 
|bgcolor=#efefef|Back          || Exit plugin
 
|bgcolor=#efefef|Back          || Exit plugin
 +
|-
 +
|bgcolor=#efefef|(Right/Left)  || (Switch to next/previous device that provides the current channel)
 
|}
 
|}
  

Revision as of 22:38, 15 February 2005

Description

Screenshot

Shows DVB signal information on the OSD.

--------------------------------------------------------------
|## Channel Name ########################## [AR][VF][A/DD][D]|
|[=====Signal Strength in % ==============|=================]|
|[=====Signal-to-Noise Ratio in % ========|=================]|
| STR: #0000 (0%)       BER: #00000000       Video: 0 Mbit/s |
| SNR: #0000 (0%)       UNC: #00000000       Audio: 0 kbit/s |
| [LOCK]     [SIGNAL]     [CARRIER]     [VITERBI]     [SYNC] |
--------------------------------------------------------------

STR     - Signal strength
SNR     - Signal-to-noise ratio
BER     - Bit error rate
UNC     - Uncorrected blocks
Video   - Calculated video bitrate in Mbit/s
Audio   - Calculated audio / AC-3 bitrate in kbit/s

LOCK    - Everything's working...
SIGNAL  - Found something above the noise level
CARRIER - Found a DVB signal
VITERBI - FEC (forward error correction) is stable
SYNC    - Found sync bytes

AR      - Aspect Ratio: 1:1/4:3/16:9/2.21:1 (optional)
VF      - Video format: PAL/NTSC (optional)
A/DD    - Audio (0..5) / AC-3 track (optional)
D       - Device number: 0..3 (optional)

Handling

Key Description
ChanUp/ChanDn Switch channel up/down
Up/Down Switch channel up/down
0-9 Select channel
Ok Switch between display modes: basic, transponder, stream, AC-3
Green Select next audio track
Back Exit plugin
(Right/Left) (Switch to next/previous device that provides the current channel)

Hardware requirements

  • DVB card

Software requirements

Installation

See plugin installation

Options

Option Description
NTSC_SYSTEM=1 added preliminary NTSC support

Problems

  • The plugin supports only those DVB cards with _one_ frontend (do any cards with multiple frontends even exist?), because I haven't yet figured howto do it without patching the VDR core.
  • Sometimes (read always) ttxtsubs plugin messes up the OSD - user should disable ttxtsubs, but closing and reopening the femon plugin might help temporarily as well. Btw., this same thing happens with OSDTeletext plugin too :)
  • Disable the stream analysis to speed up heavy zapping sessions.
  • The signal strength and signal-to-noise ratio values are comparable only between the same brand/model frontends. Due to the lack of proper frontend specifications those values cannot be calculated into any real units.
  • Shrinked OSD is available for NTSC users: make NTSC_SYSTEM=1
  • The device switching feature is still non-functional.

Links

[1] http://www.saunalahti.fi/~rahrenbe/vdr/femon Plugin homepage