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124 lines
5.0 KiB
Plaintext
124 lines
5.0 KiB
Plaintext
This is a DVB Frontend Status Monitor plugin for the Video Disk Recorder (VDR).
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Written by: Rolf Ahrenberg
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< R o l f . A h r e n b e r g @ s c i . f i >
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Project's homepage: http://www.saunalahti.fi/~rahrenbe/vdr/femon/
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Latest version available at: http://www.saunalahti.fi/~rahrenbe/vdr/femon/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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See the file COPYING for license information.
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Requirements:
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VDR and a DVB card.
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Description:
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DVB Frontend Status Monitor is a plugin that displays some signal information
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parameters of the current tuned channel on OSD. You can zap through all your
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channels and the plugin should be monitoring always the right frontend. The
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transponder and stream information are also available in advanced display modes.
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The plugin is based on a neat console frontend status monitor application
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called 'femon' by Johannes Stezenbach (see DVB-apps/szap/femon.c for further
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information). The bitrate calculation trick originates from the 'dvbstream'
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application by Dave Chapman and the stream information routines are taken from
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the 'libdvb' library by Metzler Brothers. The H.264 parsing routines are taken
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from vdr-xineliboutput plugin by Petri Hintukainen.
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Terminology:
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--------------------------------------------------------------
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|## Channel Name ################### [SVDRP][AR][VF][A/DD][D]|
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|[=====Signal Strength in % ==============|=================]|
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|[=====Signal-to-Noise Ratio in % ========|=================]|
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| STR: #0000 (0%) BER: #00000000 Video: 0 Mbit/s |
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| SNR: #0000 (0%) UNC: #00000000 Audio: 0 kbit/s |
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| [LOCK] [SIGNAL] [CARRIER] [VITERBI] [SYNC] |
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--------------------------------------------------------------
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STR - Signal strength
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SNR - Signal-to-noise ratio
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BER - Bit error rate
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UNC - Uncorrected blocks
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Video - Calculated video bitrate in Mbit/s
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Audio - Calculated audio / AC-3 bitrate in kbit/s
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LOCK - Everything's working...
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SIGNAL - Found something above the noise level
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CARRIER - Found a DVB signal
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VITERBI - FEC (forward error correction) is stable
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SYNC - Found sync bytes
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SVDRP - SVDRP connection active (optional)
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AR - Aspect Ratio: 1:1/4:3/16:9/2.21:1 (optional)
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VF - Video format: PAL/NTSC (optional)
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A/DD - Audio (0..N) / AC-3 track (optional)
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D - Device number: 0..N (optional)
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Controls:
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ChanUp/ChanDn - Switch channel up/down
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Up/Down - Switch channel up/down
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0-9 - Select channel
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Ok - Switch between display modes: basic, transponder, stream, AC-3
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Green - Select next audio track
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Yellow - Select audio channel: stereo, mono left, mono right
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Back - Exit plugin
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Left/Right - Switch to next/previous device that provides the current channel
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Installation:
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cd /put/your/path/here/VDR/PLUGINS/src
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tar -xzf /put/your/path/here/vdr-femon-X.Y.Z.tgz
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ln -s femon-X.Y.Z femon
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cd /put/your/path/here/VDR
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make
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make plugins
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./vdr -P femon
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Client-server architecture:
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The SVDRP service extension can be used in client-server configurations.
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A streamdev based VDR-to-VDR streaming client can retrieve frontend
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information from a server, if the SVDRP service has been activated and
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properly configured in femon. The svdrpservice plugin is required on the
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VDR client.
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If the client fails to open a DVB card frontend corresponding to the
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current receiving device, it will connect to the SVDRP server, look for
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the femon plugin and tune the channel on the server to the one currently
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viewed on the client. If one of these steps fails, the femon OSD won't
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open on the client. An SVDRP icon in the femon title bar indicates that
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the data source is SVDRP. The device number in the title bar is always
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the local device number.
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Notes:
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- The plugin supports only those DVB cards with _one_ frontend, because I
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haven't yet figured howto do it without patching the VDR core.
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- Disable the stream analyze to speed up heavy zapping sessions.
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- The signal strength and signal-to-noise ratio values are comparable only
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between the same brand/model frontends. Due to the lack of proper frontend
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specifications those values cannot be calculated into any real units.
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- If the OSD isn't visible, you've configured the OSD height too big or too
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small. Please, try to adjust the variable on the setup page before writing
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any bug reports. NTSC users should use a shrinked default OSD height by
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modifying VDR's setup.conf: femon.OSDHeight = 420
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- If the SVDRP service is used: femon won't notice if the server is tuned
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to a different channel and tuning the channel on the server might annoy
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people watching live TV. In some situations the server will refuse
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switching to the requested channel. On a headless server you can avoid
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this by installing the dummydevice plugin.
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"Femon - A real womon who lives according to her natural feminine inclinations."
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