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Thread: flow diagram - request

  1. #1
    Join Date
    Sep 2005
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    Melbourne, Australia
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    flow diagram - request

    I suspect I am not alone - but I get really confused about the role and sequence of all the things we talk about.

    We have muxs, filters, renderers, decoders, etc. etc. for both audio and video. Then we also have the modes Overlay, VRM7, VRM9 and now a VMR9 customs or something?

    For someone who is 'in the know' on such things - I would love to see a flow diagram of how it all fits together from broadcast to output.

    I believe placed on the wiki this could be a real benefit many users - particularly new ones.
    Core2-E2180, 1G RAM, 1Gb-5450 Silent, 2Tb +300g HDDs.
    Three tuners: Twinhan DVB-T x 1, Hauppauge Nova 500T (dual)

    DTB Digital SD + HD content (PAL-MPEG2-AC3).
    Custom case made very quiet. Zalman CPU cooler.
    Sits in rack with other HiFi.

    ParaLED to show tuner activity.

    Display: 42" 1920x1080p Panasonic Plasma

    1x wired MVP
    1x PC client


  2. #2
    Join Date
    Nov 2003
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    NextPVR HQ, Wellington, New Zealand
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    I'll slowly chip away at this question.

    Below is the usual graph when playing an MPEG2 file, which is usually where people get problems with video decoders etc. The demultiplexer is reponsible for spliting the MPEG program stream in to separate audio and video streams for sending to their respective decoder, which in turn decode the stream and forward the response to renderers for presentation.

  3. #3
    Join Date
    Nov 2003
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    NextPVR HQ, Wellington, New Zealand
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    When you look in gbpvr.exe-native.log, you'll see a list of these directshow components that were you used:

    05:32:06.500 VERBOSE Graph contains the following filters:
    05:32:06.500 VERBOSE - Default DirectSound Device
    05:32:06.500 VERBOSE - Video Renderer
    05:32:06.500 VERBOSE - Mpeg2Dec Filter
    05:32:06.500 VERBOSE - Nero Digital Audio Decoder
    05:32:06.500 VERBOSE - MPEG-2 Demultiplexer
    05:32:06.500 VERBOSE - c:\MyVideos\large\TV 2_20060220113000.mpg
    Some special directshow components like ffdshow etc can cause your machine to use slightly different graphs.

  4. #4
    Join Date
    Sep 2005
    Location
    Melbourne, Australia
    Posts
    617
    Quote Originally Posted by sub
    I'll slowly chip away at this question.
    Perhaps in your spare time
    Core2-E2180, 1G RAM, 1Gb-5450 Silent, 2Tb +300g HDDs.
    Three tuners: Twinhan DVB-T x 1, Hauppauge Nova 500T (dual)

    DTB Digital SD + HD content (PAL-MPEG2-AC3).
    Custom case made very quiet. Zalman CPU cooler.
    Sits in rack with other HiFi.

    ParaLED to show tuner activity.

    Display: 42" 1920x1080p Panasonic Plasma

    1x wired MVP
    1x PC client


  5. #5
    Join Date
    Jul 2005
    Location
    London, UK
    Posts
    210
    I believe placed on the wiki this could be a real benefit many users - particularly new ones.
    Agreed, I'm ony just getting a working understanding after a couple of years mucking around with this stuff. A breakdown like this would be worth it's weight in gold for everyone.
    C2D E6600, 2GB DDR2 800, HD5450, 4 X GDI Black Gold, 1 X Compro DVB 200, 1 X Powerlined MVP, 500GB System, 2TB RAID 0 Recording, 1GB Flash ROM timeshift buffer, Silverstone LC03 B-V Passively Cooled and Soundproofed, MCE Keyboard and receiver. Win7 32bit

  6. #6
    Join Date
    Sep 2005
    Location
    Melbourne, Australia
    Posts
    617
    This has helped me out already. By comparing and changing filters two similar machines I was able to get the judder out of live preview on one of them.
    Thanks!
    Core2-E2180, 1G RAM, 1Gb-5450 Silent, 2Tb +300g HDDs.
    Three tuners: Twinhan DVB-T x 1, Hauppauge Nova 500T (dual)

    DTB Digital SD + HD content (PAL-MPEG2-AC3).
    Custom case made very quiet. Zalman CPU cooler.
    Sits in rack with other HiFi.

    ParaLED to show tuner activity.

    Display: 42" 1920x1080p Panasonic Plasma

    1x wired MVP
    1x PC client


  7. #7
    Join Date
    Nov 2003
    Location
    NextPVR HQ, Wellington, New Zealand
    Posts
    75,867
    I will be adding some info at some stage, but I'm a bit busy with other stuff at the moment.

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