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Amazon HD File Playback Issues

Discussion in 'TiVo Roamio DVRs' started by elwaylite, Sep 11, 2013.

  1. elwaylite

    elwaylite Member

    367
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    Apr 23, 2006
    Theodore, Al.
    I bought the Basic to record both OTA and get Amazon HD TV shows because of the excellent PQ.

    Since starting this two weeks ago, I regularly see some pixellation at times with playback, granted its minor and not often throughout the show. The other problem is, out of about 15 shows watch, 2 have been corrupted and locked up part of the way through. This is not huge, because I just get on chat and Amazon will force a new download that ends up playing back fine.

    Im not sure if this has been common, or is just a Roamio bug. Resolution has nothing to do with it, because itll happen at the same point every time regardless of settings, and since a new fine will play fine, it leads me to believe its a tivo issue either when it writes it to the drive, or when it plays it back.

    Just wondering if anyone is seeing this, or if its been a problem on other models?
     
  2. elwaylite

    elwaylite Member

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    Apr 23, 2006
    Theodore, Al.
    Here are examples from a new episode of Top Gear US:

    Before it starts
    [​IMG]

    As it starts
    [​IMG]

    Gets going
    [​IMG]

    [​IMG]

    [​IMG]

    Then itll clear right back up.
     
  3. Dan203

    Dan203 Super Moderator Staff Member TCF Club

    37,506
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    Apr 17, 2000
    Nevada
    That's a decoding error. Either the stream got corrupted during download or there is an error in the encode on Amazon's end. It's highly unlikely this is a Roamio issue.
     
  4. elwaylite

    elwaylite Member

    367
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    Apr 23, 2006
    Theodore, Al.
    I guess my only question with that is, why is the next time the file is downloaded its OK?

    I guess I get a corruption during download, but that just seems like something that should not happen this often. I dont ever remember this issue on my premier or S3.
     
  5. elwaylite

    elwaylite Member

    367
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    Apr 23, 2006
    Theodore, Al.
    I wonder if taking it off wifi would make a difference?
     
  6. Dan203

    Dan203 Super Moderator Staff Member TCF Club

    37,506
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    Nevada
    So if you redownload the same episode the problem goes away? Definitely a corruption issue. The first thing I would try is getting rid of wifi. Although TCP/IP should have enough error correction to prevent that. If you still have the problem you might want to consider swapping out the Roamio. You may have some sort of hardware problem.
     
  7. moyekj

    moyekj Well-Known Member

    11,148
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    Jan 23, 2006
    Mission...
    I'm seeing some macroblocking for Amazon HD downloads of some "Breaking Bad" episodes (season 5, episode 1 for example) on my Roamio Plus.

    I think it's a bug with Roamio platform during download process. I say that because:
    * If I re-download same show to Roamio the macroblocking doesn't happen in same places
    * If I download same show to my Premiere or Elite there are no issues there

    If it was a Roamio decoder issue of some sort I'd expect macroblocking in same places for different downloads of same show, which I'm not seeing.
    In my case Roamio connects directly to my GigE router though the type of network shouldn't really matter.

    Note that so far the macroblocking is minor and only see it about 2-3 times per 42 minute episode, so it's not a huge problem but is annoying.

    Does anyone know the format of Amazon downloads to TiVos these days? I'm guessing Amazon HD downloads are mp4 container with H.264 video and AC3 audio but I'm not sure... A long time back they were using VC-1 in wmv container and wma audio for TiVos but I'm pretty sure that's no longer the case.
     
  8. Dan203

    Dan203 Super Moderator Staff Member TCF Club

    37,506
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    Apr 17, 2000
    Nevada
    If you replay the same file, without re-downloading, is the problem always in the same place? If so it sounds like something is getting corrupted when TiVo is converting from the Amazon download format to their internal storage format. I wonder what the Amazon download format is? MP4? TS? Something else?
     
  9. elwaylite

    elwaylite Member

    367
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    Apr 23, 2006
    Theodore, Al.
    Thanks for the input. I just installed a new home theater version of a 4 port powerline adapter, tivo is working well with it. That will at least rule out wifi, but it sounds like it my just be something with the Roamio that needs to be fixed with a FW update.

    Earlier I tried watching the first episode of the new season of Luther from BBC in HD, and it had some random macroblocking and locked up about 5 mins in, so I deleted the file. Im halfway thru the forced re-download from Amazon customer service and it hasnt broken up once.
     
  10. elwaylite

    elwaylite Member

    367
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    Apr 23, 2006
    Theodore, Al.
    If I restart the show, it breaks up in the same spot and locks up in the same spot. Ive had to delete two episodes of two different shows so far and re download. The second download has gone off without a hitch.
     
  11. moyekj

    moyekj Well-Known Member

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    Yes, for me I get macroblocking in exact same spots when re-playing a corrupted segment, so it looks to be corruption that is part of the recording itself. As Dan mentioned it's probably a bug in Roamio re-muxing to whatever internal format recordings are stored on the TiVo, but it's just a guess as I don't know how Amazon downloads to TiVo work exactly.
     
  12. elwaylite

    elwaylite Member

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    Apr 23, 2006
    Theodore, Al.

    So as it downloads the Amazon container, it is converting it to the TiVo format real time? Or would it do it at the end of the download? Just curious.
     
  13. moyekj

    moyekj Well-Known Member

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    If there is a conversion (which I don't know if that is the case) it would be in real time, since you can start watching before the download completes.
     
  14. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    Nevada
    If it breaks up in the same spot every time then that is definitely some sort of data corruption. Since moyekj is seeing the same thing it does seem to be a software problem. TiVo must be doing something wrong when converting the Amazon download container to their internal storage format. :(
     
  15. moyekj

    moyekj Well-Known Member

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    Mission...
    These Amazon HD downloads are such good quality video that any glitching such as this becomes all that more noticeable. I've been impressed at quality of Amazon downloads compared to my cable provider "HD" channels.
    I supposed a workaround for me is to download to 1 of my series 4 units instead. It's too bad these Amazon downloads are blocked for MRS though!
     
  16. elwaylite

    elwaylite Member

    367
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    Apr 23, 2006
    Theodore, Al.
    I agree, the PQ is phenomenal. Im not downloading much yet because its slow, but stuff like Hell on Wheels is OUTSTANDING and destroys anything Dish Network hopes to do. I cant wait to get into the news Sons of Anarchy stuff.

    I have noticed that some of it is 1080p/60 (Luther from BBC and Top Gear US), but other stuff is 1080p/24 (Low Winter Sun and Hell on Wheels).
     
  17. moyekj

    moyekj Well-Known Member

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    Wow, 1080p/60, are you sure? Ones I downloaded so far (not many) have all been 1080p/24. Note that if you have 1080p output turned on in TiVo outputs and not 1080i then TiVo will upconvert to 1080p/60 unless it gets 1080p/24 which it passes through.
     
  18. Dan203

    Dan203 Super Moderator Staff Member TCF Club

    37,506
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    Nevada
    It probably depends on how it's shot. Some shows are still shot at 60fps because it makes conversion for TV easier. So the native format might actually be 1080p@60.
     
  19. elwaylite

    elwaylite Member

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    Apr 23, 2006
    Theodore, Al.
    Yes. Confirmed with display and Denon AVR. Most normal shows shot on film are of course 1080p/24. Copper, which is BBC America is 1080p/24, but Luther being BBC was 1080p/60. Luther looks excellent however its shot.

    Newest episode of hell on wheels just blocked up and locked up with 10 mins to go. Deleted and on chat with Amazon getting it resent to tivo. Im unfortunately getting good at these chat thing...

    Just watched a episode of Low Winter Sun, and it player without any blocking. Hopefully a tivo elf will see this thread.
     
  20. TiVoMargret

    TiVoMargret VP Product Dev, TiVo

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    Feb 2, 2008
    Silicon Valley
    We believe we have fixed this issue in a software update that we are currently testing in Beta. If anyone is interested in joining the Beta in order to verify that the fix is working for them, please sign up here:

    https://fieldtrials.tivo.com/signup/default.html

    then, email me (margret@tivo.com) with the subject: "Roamio Beta for Amazon fix" and I'll see if I can have you added to the Beta.

    --Margret
     

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