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Channel changing STBs using firewire

Last post 08-09-2006, 5:12 PM by Chris - Moderator. 1643 replies.
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  •  05-02-2005, 3:35 AM 46194 in reply to 44138

    RE: Channel changing STBs using firewire

    I am able to view video on my pc via VLC media player (though very blocky so far) but wasn't able to change channels (from pc). I looked at it as the stb was the tuner.

    Thanks,

    Fleck
  •  05-02-2005, 7:17 AM 46209 in reply to 44138

    RE: Channel changing STBs using firewire

    Downloaded the new zip and setup, very cool! I ran a test this morning recorded about 5 minutes of a SD show and then played back. When I played it back it was like it was in FF, picture and sound were really fast. I have a bunch of shows set to record tonight so I will see how it goes.

     

    Also on a side note. I downloaded a mpeg player from Moonlight that includes a elecard demuxer and uninstalled the NVIDIA DVD decoder so cyberlink would be the default, .ts streams play fine in WMP and you can now skip but when I try it in MCE it does not play. You can skip forward and backward but it just sit there and does not play. Now I did not restart the computer after making the changes so I will try again later tonight or in the morning.

     

    I asked in the avsforums but did not get an answer maybe some reading this thread knows. Being the NVIDIA DVD decoders need to be installed. If I create a graph in GraphEdit how do you make that graph the default?

  •  05-02-2005, 10:13 AM 46253 in reply to 44138

    RE: Channel changing STBs using firewire

    Fleck, The problem is that the change channel MCE integration is when MCE changes channel, it only does that for tuners it is looking after. MCE doesn't know anything about firewire tuners, you are running a different program i.e VLC that does understand firewire tuners. The command line program channel.exe can be used when other programs use the firewire tuner. Or you need to find a way for MCE to think theres an analogue tuner. You can do this by putting a analogue tuner card in MCE, or I think theres a hack posted somewhere for making MCE think theres a tuner, this hack was used to allow playback of content recorded on another MCE.

    Nathang, there are 2 separate directshow graphs involved. 1 is setup and owned by MCE for playback of dvr-ms files. It uses the video and audio decoder filters.

    The 2nd graph is setup by my program, it doesn't use the video/audio decoders. The only filter that is needed that is not part of MCE is the NVIDIA TS Info p****r. This graph takes MPEG2TS from the firewire tuner, demultiplexs it to encoded audio and video and stores the encoded streams in a dvr-ms file. Currently the NVIDIA TS Info p****r is hardcoded into the program. I tried the moonlight demux and it doesn't connect to the firewire tuner. I tried the NVIDIA HDTV demux which works but often drops one of the audio or video streams from the file. So only the NVIDIA TS info p****r works at the moment. Does the moonlight decoder support MCE, I didn't think it was on the supported list?

    Can you try playing the recorded file in media player, does it still play fast? Can you try graphedt?

    Also you dont need to uninstall the NVIDIA decoder to make cyberlink the default. The video decoder checkup utility allows you to set the default decoder.

  •  05-02-2005, 11:25 AM 46265 in reply to 44138

    RE: Channel changing STBs using firewire

    timmmore, nice work.

    does your program only work with Morotola STBs? What about firewire equipped SCI ATL boxes?


    D
  •  05-02-2005, 12:41 PM 46296 in reply to 44138

    RE: Channel changing STBs using firewire

    drod01, 

    I haven't been able to try it so I dont know. Have you tried capturing according to the work on www.avsforum.com?

    If you haven't tried plugging the stb in then if you plug in the device, cancel any hardware wizard to install devices. Then start the device manager. You should see 1 or more unknown devices. Right click on each unknown and select properties then go to the details tab. Device Instance Id should be selected and a string should be displayed underneath.

    Post the string displayed for each unknown device, I should be able to tell if its worth trying to force the system to accept any of the drivers.

    If you have already plugged it in then just post the device ids for the tuner and for any unknown devices.

  •  05-02-2005, 6:25 PM 46357 in reply to 44138

    RE: Channel changing STBs using firewire

    Ok did some more testing and recorded some more sd shows and an hd show. All the sd shows play fast in MCE, WMP, and graphedit. The HD show fist time I tryed did not play but the second time was perfect.
  •  05-02-2005, 6:32 PM 46359 in reply to 44138

    RE: Channel changing STBs using firewire

    What audio decoder and audio output device do you use? I am guessing but normally the rendering is synchronized to audio, i.e. audio output supplies a clock to the audio decoder and then to the dvr-ms source filter which sync the video to the same clock. I am playing audio via SPDIF using the NVIDIA audio decoder. If you are using the nvidia audio then there is an icon in the systray which can open a dialog with an audio tab which shows some info including the bit rate it is receiving. The NVIDIA video decoder also shows the video bitrate.

    In graphedit the clock source should be shown, you can try right clicking on the audio render and selecting set clock.

  •  05-03-2005, 4:02 AM 46419 in reply to 44138

    RE: Channel changing STBs using firewire

    I am using the NVIDIA Decoders both audio and video the bitrate for video is between 8 and 10 and the audio is between 256 and 384. I had it set to output just to my tv at first I tryed changing to spif but it is still the same. In graphedit it will not let me select clock it is grayed out.


    Also I had two show set to tape last night at 9:00 (currently only have one receiver hooked up via firewire but two tuners) so one of the shows should of taped with firewire also but it looks like it did not.
    Lastly I taped another show this morning in HD and it worked great. It's just the SD channels. I would send you a clip but it is 135mb for a few minutes. But maybe I can upload it somewhere and you could then downoad it. I let you know.
  •  05-03-2005, 10:03 AM 46485 in reply to 44138

    RE: Channel changing STBs using firewire

    Nathang, I downloaded the file and on one machine it played in graphedt and media player without problem. I will copy it onto my MCE and try it there. When it worked I was using the AC3 filter, when I tried it with NVIDIA I got the same problem as you. The machine I tried this on wasn't using SPDIF and the NVIDIA decoder I have is the bronze and doesn't translate 5.1 to other speaker setups. The AC3 filter does. My MCE uses the NVIDIA audio decoder but it only uses SPDIF. Can you try the AC3 filter and see if that fixes it?

    The recording problem, I have found a problem in that it records correctly on tuner1 but misses recording on tuner2. Looking at the log file, I think the firewire tuner is tuner2. I thought I had fixed it last night but when I check some recordings later I hadn't fixed it. So I need to take another look at it.

  •  05-03-2005, 10:12 AM 46490 in reply to 44138

    RE: Channel changing STBs using firewire

    Timmmoore,

    Does the latest release work on the extender?

    -t

  •  05-03-2005, 10:55 AM 46508 in reply to 44138

    RE: Channel changing STBs using firewire

    Timmmoore,

    I install the ac3 filter on a different PC than my MCE and that fixed the audio but the video is still fast (using the Nvidia decoders on that pc also). This morning I tryed setting the Nvidia audio decoder to spif passthrough but it was still fast. Tonight I will try to install the ac3 filter and see if that fixes it. The strange thing is HD stations work fine. Thanks again.

  •  05-03-2005, 11:47 AM 46516 in reply to 44138

    RE: Channel changing STBs using firewire

    Nathang, I looked at a ts capture sometime ago and found there is a difference in the audio encoding between SD and HD. I decided that this was part of the problem that was confusing the NVIDIA HDTV demux. It could also be the problem, the NVIDIA audio decoder not handling the SD encoding but AC3 can. I need to check my MCE to see if I installed AC3 on it at sometime at isn't SPDIF that make sit work but the fact I am using the AC3 filter.

    TimmyDOTcom, Not yet. I have started the changes for extenders but I will be surprised if I have anything before the weekend. I have to put in a communication mechanism to pass events from the extender ehmsas processes to 1 central tunertracker which sorts out which tuner is being used for what. I also expect I will need to change the tuner tracking algorithm once I start handling extender events.

  •  05-03-2005, 8:17 PM 46635 in reply to 44138

    RE: Channel changing STBs using firewire

    Ok install the ac3filter at home and recorded some new sd showes and the audio is good but rhe video is fast. I am using the Nvidia video decoder.

    Edit:I tryed using capdvcr and that is playing back fast now? not sure what got messed up.

  •  05-03-2005, 11:21 PM 46655 in reply to 44138

    RE: Channel changing STBs using firewire

    I checked and I have ac3 installed though its not the default filter but whether its used or not will depend on the audio media type coming from the firewire tuner.

    I checked again with old and new SD (and HD) recordings and no video speed or audio problems.

    Take a look for C:\MyGraph_Sink.GRF (and C:\MyGraph_Sink1.GRF), I save the filter graph for the recording there. It overwrites any previous versions. You should be able to load into graphedt but its not really usable since you can't set a filename. You can also see the filter graph MCE uses to play, by playing in MCE, then in graphedt do connect to remote computer, you will see a list of the filter graphs published on the local machine. MCE publishes its play graphs.

    I found the problem with tuner 2 but I have put in a lot of changes with the start of the work to handle extenders so I need to test a few things before updating.

  •  05-04-2005, 6:13 AM 46704 in reply to 44138

    RE: Channel changing STBs using firewire

    Timmmoore,

     

                I installed the AC3 Filter on my MCE PC and the audio is good but the video is still fast. I loaded the clip in graphedit and removed the audio filter and then played the video and it plays fine. If I add the NVIDIA audio filter the audio and video are in sync but plays to fast no matter what setting I have in the audio filter and if I add the ac3 filter the audio play fine but is out of sync with the video which plays fast. On another system with the same combo of filters it does the same thing, but in graphedit if I change the audio filter to Intervideo it is all in sync.

    I will try to look at the two graph filters late tonight. Do you know what audio filter you are using when playing back SD? Also I found that HD works fine, SD recorded from Digital channels works fine, it is just SD from analog channels.

    Could you export your AC3 filter setting from HKCU/Software/AC3Filter for me or for what ever filter you are using for audio SD playback and then I can try the same setting that you are using. Also what version of the AC3 filter do you have? I installed 1.01a.

     

    Nathan

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