Live DVB Subtitles display incorrectly

Discussion in '1.0 final and SVN Builds' started by mortstar, March 26, 2009.

  1. mortstar
    • Premium Supporter

    mortstar MP Donator

    Joined:
    January 30, 2008
    Messages:
    415
    Likes Received:
    41
    Ratings:
    +41 / 0
    Home Country:
    England England
    TV-Server Version: MP1 + svn 22029
    MediaPortal Version: MP1 + svn22029
    MediaPortal Skin: StreamedMP v0.6
    Windows Version: Windows XP Pro SP3
    CPU Type: Intel C2D E8200
    HDD: WD 500Gb + WD 640Gb
    Memory: 2x 2Gb Geil Black Dragon
    Motherboard: Gigabyte GA-G33M-DS2R
    Video Card: HIS ATi 3870
    Video Card Driver: 8.12
    1. TV Card: BlackGold 6 in 1 BGT3540
    1. TV Card Type: Dual DVB-S & Dual DVB-T
    1. TV Card Driver: 6.0.0.25 (17/07/07)
    2. TV Card: TechniSat SkyStar HD 2
    2. TV Card Type: Single DVB-S2
    2. TV Card Driver: 1.1.0.402 (25/01/08)
    MPEG2 Video Codec: Cyberlink PowerDVD9
    MPEG2 Audio Codec: ac3filter + ffdshow
    h.264 Video Codec: Cyberlink PowerDVD 8 h.264 (TV) + MPC-HC (Video)
    Satelite/CableTV Provider: UK Freesat & UK Freeview
    HTPC Case: Antec Fusion v2 Silver
    Cooling: Scythe Mini Ninja
    Remote: MCE Remote via iMON OEM receiver
    TV: Panasonic TX-32LXD85
    TV - HTPC Connection: ATi DVI -> HDMI

    This is a problem with how subtitles are displayed within Mediaportal during a live TV programme (as in, the programme is having subtitles transcribed whilst airing. Classic examples are News, Live sports etc). If a programme is viewed in VLC, live-transcribed subtitles are displayed like this (number represents order the words are displayed):



    Line 1 - 1 1 1 1 1 1 1 1
    Line 2 - 2 3 4 5 6 7 8 9
    Once Line 2 fills up, it is shifted to Line 1 (i.e. is a fixed line of text). Line 2 displays each word as it arrives.

    In MediaPortal, the same programme will display the subtitle stream like this:

    Line 1 - 1 1 1 1 1 1 1 1
    Line 2 - 2
    3-9 are not displayed on Line 2, the subtitles stay fixed until Line 2 is filled, then 2-9 are shifted up to Line 1 and Line 2 only display 10.

    I'm sorry about how this is described but it is better viewed then written down! I have a sample .ts which is a 1 minute clip of a programme from BBC 4 having subtitles transcribed. Viewing this clip within MediaPortal side-by-side with VLC, the problem would be easy to see. If ftp details can be given out, I can upload the clip.

    Also attached are logs from me viewing the .ts clip in the RecordedTV section of MediaPortal
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. tourettes
    • Premium Supporter

    tourettes Retired Team Member

    Joined:
    January 7, 2005
    Messages:
    17,301
    Likes Received:
    4,595
    Ratings:
    +4,810 / 3
    Sounds like it would require a bigger changes in the way how subtitles are decoded / rendered in MP. Not sure if I'm going to start to dig into this issue anytime soon, sorry.
     
  4. mortstar
    • Premium Supporter

    mortstar MP Donator

    Joined:
    January 30, 2008
    Messages:
    415
    Likes Received:
    41
    Ratings:
    +41 / 0
    Home Country:
    England England
    No worries, thanks for the reply.
     
  5. nobbly

    nobbly Portal Member

    Joined:
    September 18, 2007
    Messages:
    21
    Likes Received:
    0
    Ratings:
    +0 / 0
    Home Country:
    England England
    I posted on this same problem back in 04/2008. Here's the link -
    https://forum.team-mediaportal.com/...-tsreader-based-25838/index16.html#post252905


    The live subtitles problem is not particularly a big issue for me as most live subtitles aren't particularly that accurate anyway, particular the BBC's! Although Channel 4 live subtitles seem to display properly, well at least the last time I checked.

    However, what is still a big issue for me is the rewind problem - it's still there! Using rew/ffwd is a far better way of navigating than skipping, and is what most people would expect to use on standard commercial equipment such as pvr's, as well dvd players etc, and I am a bit surprised this bug hasn't yet been fixed. I will post a bug report at some time about the rewind issue to see if anything comes of it, particularly as MediaPortal is now much better at rew/ffwd. Oh and there is another bug with DVB subtitles where the subtitles often get missed with TV channels E4 & E4+1.
     
  6. tourettes
    • Premium Supporter

    tourettes Retired Team Member

    Joined:
    January 7, 2005
    Messages:
    17,301
    Likes Received:
    4,595
    Ratings:
    +4,810 / 3
    Please post a full bug report about that issue (including a TS recording sample that can be used to reproduce the issue). Otherwise I cannot solve the possible bug.
     
  7. nobbly

    nobbly Portal Member

    Joined:
    September 18, 2007
    Messages:
    21
    Likes Received:
    0
    Ratings:
    +0 / 0
    Home Country:
    England England
    Will do. Will take a few days for me to do so though.
     
Loading...

Users Viewing Thread (Users: 0, Guests: 0)

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice
  • About The Project

    The vision of the MediaPortal project is to create a free open source media centre application, which supports all advanced media centre functions, and is accessible to all Windows users.

    In reaching this goal we are working every day to make sure our software is one of the best.

             

  • Support MediaPortal!

    The team works very hard to make sure the community is running the best HTPC-software. We give away MediaPortal for free but hosting and software is not for us.

    Care to support our work with a few bucks? We'd really appreciate it!