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Download from Roamio v. Tivo Desktop Plus

Discussion in 'TiVo Roamio DVRs' started by booboy97, Oct 28, 2013.

  1. booboy97

    booboy97 New Member

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    Sep 20, 2000
    Pleasanton,...
    Have an S3 and TivoHD and was thinking of upgrading to Roamio Pro in part because of traveling and wanting to take my shows with me on the plane.

    How is the direct to iPad quality of the transfers from the Roamio compared to downloading and converting via Tivo Desktop Plus? I just don't like the two step process for Tivo Desktop.

    Thanks!
     
  2. markp99

    markp99 TakoKichi TCF Club

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    Mar 21, 2002
    Nashua, NH
    There are 3 options for downloading. It's a tradeoff of quality, space and DL time - all much easier than TiVo Desktop to iOS devices.

    For a 60 Minute program, I see the following:

    Best: 2GB, 33 min
    Medium: 1GB, 19 min
    Basic: 687MB, 10 min
     
  3. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    Nevada
    Your sizes are off. Mine says...

    Best 1GB
    Medium 600MB
    Basic 413MB

    To me Best looks great. Medium is acceptable, but shows some blocking during fast motion. I have not tried Basic yet, but if it's worse then Medium I'd say it's probably only acceptable for talking head type shows.
     
  4. moyekj

    moyekj Well-Known Member

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    Mission...
    Is the encoding a fixed rate? Depending on the input source you may end up with different size outputs.
     
  5. Devx

    Devx New Member

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    Jun 1, 2006
    Atlanta, GA
    It must be variable, different shows, all of the same length, have varying sizes after conversion. It would also help explain OOH downloading updating its calculated size as it converts the file.
     
  6. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    Maybe. However I tried both an HD and a SD file and both showed 1GB for best.
     
  7. markp99

    markp99 TakoKichi TCF Club

    11,133
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    Mar 21, 2002
    Nashua, NH
    Sorry, Bad example, the program I looked at had a recording time of 1:22. Oddly enough the program name was "60 Minutes". :eek: :)

    An actual 60 minute recording:

    Best: 1GB, 16 min
    Medium: 600 MB, 9 min
    Basic: 338MB, 5 min
     
  8. moyekj

    moyekj Well-Known Member

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    So that translates to these download bit rates which I believe matches the bit range rate Margret posted elsewhere:
    1000 MBytes * 8 bits/Byte / 3600 secs = 2.22 Mbps
    600 MBytes * 8 bits/Byte / 3600 secs = 1.33 Mbps
    413 MBytes * 8 bits/Byte / 3600 secs = 0.92 Mbps

    Is there any indication anywhere of the resolutions of each?

    As a comparison point of reference my Slingbox 350 can give me 1920x1080 H.264 captures up to 7 Mbps and of course via TTG you can generate encoding rates higher than that (or preserve the original source recording).
     
  9. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    Those are the values I see on my iPhone. On my iPad Basic is the higher value I mentioned.
     
  10. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    Nevada
    The full system information screen shows resolution and bitrate on the clients tab when downloading. I just ran tests on my iPhone and iPad and here are the results...

    iPhone
    Basic 544x400 600kbps
    Medium 960x540 1.24mbps
    Best 960x540 2.24mbps

    iPad
    Basic 544x400 800kbps
    Medium 960x540 1.24mbps
    Best 1280x720 2.24mbps

    The most curious one is the iPhone Best. It's the same bitrate as the iPad but lower resolution. They should be able to lower the bitrate and get the same visual quality. In fact we have a calculation for this in VideoReDo i should look it up and run the numbers and see what it should be.
     
  11. aaronwt

    aaronwt UHD Addict

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    Northern...
    So 720P streaming is the max? Have they said anything about higher resolution streaming? I think the Slingbox does up to 1080P streaming. Or maybe that's only to a PC?
     
  12. moyekj

    moyekj Well-Known Member

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    As I posted above Slingbox 350/500 can do 1920x1080 H.264 at least up to 7 Mbps. I haven't tried capturing streams with rate higher than 7 Mbps but it may be possible. The older Slingbox Pro HD is limited to up to 720p resolution.
     
  13. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    TiVo has said they are working on a better adaptive streaming system which will include a broader range of resolutions and bitrates. Maybe when that's done they'll get it up to 1080p?

    P.S. I ran the quality factor calculation on the numbers and something strange came up. The resolution differences make up for all of the bitrate differences. So, as far as compression goes, all 3 streams on the iPad are equivalent. You should not see any more macroblocking on Basic then you do on Best. The only difference should be that the Basic stream will look softer and maybe a bit more jagged because it's being upsampled from a lower resolution. That also means that the highest quality encode in the whole mix is actually the iPhone Best mode. It is dedicating more bits per pixel then all the other modes on both devices.
     

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