Difference between revisions of "TS Info"

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=== Introduction ===
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In the Open Source multimedia field there are various choices for multimedia streaming and playback. However analysing and checking validity of [[MPEG-TS]] streams is not really possible. DVBsnoop (http://dvbsnoop.sourceforge.net/) is the only application that is only one that comes near this goal, but it is a commandline utility. This doesn't make it easy to be used.
  
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After some discussion on IRC regarding availability of a Linux utility to display MPEG-TS info from UDP / RTP streams, I have decided to have a go at writing something to do just this.
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The goal of TS Info is to be an easy to use MPEG-TS (MPTS/SPTS) analyser with all the information, analysis and validation right under you finger tips.  
  
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I will hopefully be using libdvbpsi for a lot of the parsing duties. I am aware of tools like dvbsnoop, but they don't quite meet the requirements.  I'm looking for something similar to TSReader Lite, without the licensing issues and win32 dependency.
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It should also be possible to insert the TS Analyser/TS Monitor in between the client and the server and monitor the stream for the boundaries configured. If the boundaries (or rules) are crossed, then a trigger will be sent to indicate a deviation from the required settings.
  
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So the question is what features would people like to see?  So far I have:
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== Features ==
  
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* Ability to read MPEG-TS wrapped in both raw UDP, and RTP/UDP
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* Input from TS/RTP/UDP or TS/UDP
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* Ability to use linux-dvb devices
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* Possible extension to use linux-dvb device (maybe use [[dvblast]] as input)
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* Display of a tree hierarchy with PAT / PMT / SID / PID information
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* PID list and bandwidths / %age - bargraph
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* Display NIT table if it exists
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* [[Bitrate]]s (also audio and video separate)
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* Calculation of bandwidth of each PID, as well as percentage bandwidth used by each PID
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* Mux distance of audio and video packets
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* SI table parsing (NIT, PMT, PAT, EIT, CAT, etc.) / descriptor parsing
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* Detect scrambled content (check scrambling bits 11, 10, optional 01/00)
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* [[I-frame]] gap
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* Determine [[GOP]] length
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* Detect Open/Closed GOP
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* Teletext/closed captioning detection
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* CRC errors
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* I-frame decoding
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* Discontinuity indication
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* Subtitle decoding
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* EPG grid
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* PID selection and forwarding to VLC (via UDP stream?)
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* Triggers on deviation from set boundaries (mux distance < 500ms, if not then sent trigger eg: sms/e-mail)
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* Mention conformance to which standard and link to it if online source is available
  
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Any wishes or ideas would be welcome at this stage.
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== Architecture ==
  
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Gatty.
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proposal:
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* TS Analyser GUI - user interface to browse the MPEG-TS stream content (information gathered is similar to DVBsnoop)
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* TS Analyser    - real-time MPEG-TS analyser that informs the GUI/TS Monitor of features discovered and various measurements
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* TS Monitor      - real-time MPEG-TS monitor that triggers on deviations of preferred features in the MPEG-TS stream
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<pre>
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                                    TS Analyser GUI
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                                          |
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MPEG-TS --------> RTP/UDP input ---> TS Analyser --> RTP/UDP output
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(MPTS/SPTS)                                |
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                                    TS Monitor --> send trigger if deviation detected
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</pre>
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== License ==
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* TS Analyser GUI : GPLv2
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* TS Analyser library : LGPLv2.1
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* TS Monitor daemon : GPLv2
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[[Category:Dev Discussions]]

Latest revision as of 05:02, 16 May 2019

In the Open Source multimedia field there are various choices for multimedia streaming and playback. However analysing and checking validity of MPEG-TS streams is not really possible. DVBsnoop (http://dvbsnoop.sourceforge.net/) is the only application that is only one that comes near this goal, but it is a commandline utility. This doesn't make it easy to be used.

The goal of TS Info is to be an easy to use MPEG-TS (MPTS/SPTS) analyser with all the information, analysis and validation right under you finger tips.

It should also be possible to insert the TS Analyser/TS Monitor in between the client and the server and monitor the stream for the boundaries configured. If the boundaries (or rules) are crossed, then a trigger will be sent to indicate a deviation from the required settings.

Features

  • Input from TS/RTP/UDP or TS/UDP
  • Possible extension to use linux-dvb device (maybe use dvblast as input)
  • PID list and bandwidths / %age - bargraph
  • Bitrates (also audio and video separate)
  • Mux distance of audio and video packets
  • SI table parsing (NIT, PMT, PAT, EIT, CAT, etc.) / descriptor parsing
  • Detect scrambled content (check scrambling bits 11, 10, optional 01/00)
  • I-frame gap
  • Determine GOP length
  • Detect Open/Closed GOP
  • Teletext/closed captioning detection
  • CRC errors
  • I-frame decoding
  • Discontinuity indication
  • Subtitle decoding
  • EPG grid
  • PID selection and forwarding to VLC (via UDP stream?)
  • Triggers on deviation from set boundaries (mux distance < 500ms, if not then sent trigger eg: sms/e-mail)
  • Mention conformance to which standard and link to it if online source is available

Architecture

proposal:

  • TS Analyser GUI - user interface to browse the MPEG-TS stream content (information gathered is similar to DVBsnoop)
  • TS Analyser - real-time MPEG-TS analyser that informs the GUI/TS Monitor of features discovered and various measurements
  • TS Monitor - real-time MPEG-TS monitor that triggers on deviations of preferred features in the MPEG-TS stream
                                     TS Analyser GUI
                                           |

MPEG-TS --------> RTP/UDP input ---> TS Analyser --> RTP/UDP output
(MPTS/SPTS)                                |
                                     TS Monitor --> send trigger if deviation detected

License

  • TS Analyser GUI : GPLv2
  • TS Analyser library : LGPLv2.1
  • TS Monitor daemon : GPLv2
Retrieved from "https://wiki.videolan.org/index.php?title=TS_Info&oldid=61391"