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Support Horrible blue aliasing/artifacts in black areas during video playback

Discussion in 'Android Devices' started by jkc120, Dec 17, 2011.

  1. EarlZ

    EarlZ Android Enthusiast
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    @BlueBiker

    Thanks, I've already reported this to my local samsung office and they have agreed to give me a refund since they are not able to fix the issue with a screen replacement and the issue varies from screen to screen. I still had 1 pending screen replacement but they advised me to cancel it and they want to get my phone as is so they can examine it, Hopefully all of their words are true.
     

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  2. ghosthunter

    ghosthunter Member
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    Did you purchase directly from samsung? If not they will still refund? How does that effect your contract with verizon?


    I just realized something, I had exchange my Nexus 4 times for different reasons each time, so when I went to check batman video and even the one above the reelsteel clip one, I saw a huge improvement, maybe a fleck here and there, but nothing I would never really notice unless I was purposely looking at it. It was a huge difference compared to my first device. It is like night and day.

    The thing is my screen is not perfect, I have this horrible vertical band right in middle of screen, not as noticeable at 50% brightness or higher but still annoying and contemplating getting exchange again but don't want to go through hassle.

    What does that mean? I think samsung has horrendous quality control, and just this never came up in their tests. Not sure how or what causing it and if it will ever get fixed.

    So I think you should get money back no way to know if they be able to fix it. Same for others unless you keep exchanging, but maybe have 1 in 10 chance of getting a good one.
     
  3. EarlZ

    EarlZ Android Enthusiast
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    I actually own a Gnote and not a Gnexus but my friend who has one has the very same results as I do.

    My phone was purchased in a samsung retailer so I dont need to trouble with any contracts.

    Its been known that every screen differs in the playback results, its all lottery :)
     
  4. ghosthunter

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    yeah I am still contemplating if I should exchange this to fix the vertical band because it really annoying me, but then my luck I get either purple tint on grays or this problem will start up again.

    It really ridiculous so many problems with display on a $700 phone
     
  5. EarlZ

    EarlZ Android Enthusiast
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    Well Im getting mine refunded as this is just unacceptable.
     
  6. ghosthunter

    ghosthunter Member
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    I don't blame you, only reason I am sticking with nexus at this moment, is because of pure ICS and dev support.

    I am so tempted to go rezound if they just had ICS officially.
     
  7. jkc120

    jkc120 Android Expert
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    It didn't look very likely the Rezound was going to get AOSP ICS support other than hacks that would work poorly (e.g. performance might suck), so I decided I would live with the video stuff since the rest of the phone was to my liking.

    BTW, someone opened a google bug report on this, so I would suggest starring and/or writing in your experience. Probably a long shot that it'll help but starring it will take 5 seconds, so... :)

    Issue 23862 - android - Galaxy Nexus display is very poorly calibrated - Android - An Open Handset Alliance Project - Google Project Hosting
     
  8. BlueBiker

    BlueBiker Android Expert
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    Just curious, do you know of any reason Rezound might perform poorly with any particular ICS variant? Reason I ask is that its Snapdragon S3 is still reasonably close to leading edge while also being thoroughly mainstream, so I'd be surprised if there were any major hiccups in porting ICS to it.

    Good. It's one thing to complain about problems, but it's another to put it in black & white on the developer's plate to fix. :)
     
  9. hlsilver

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    Noticed this issue for the first time on my second GNex and it is extremely annoying. Is it a software issue that can be fixed?
     
  10. jkc120

    jkc120 Android Expert
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    I took a few pictures at various exposure levels of this sample video which demonstrates the "halo"/"splotchiness"/color-banding effect during video playback. The pictures of this video are from the very beginning of this video:

    http://dl.dropbox.com/u/28717002/drwho.mkv

    Here are the pictures demonstrating what I see on my phone when I watch videos (more noticeable in a completely dark room, but sometimes even visible in low-to-medium light).

    This was taken with dice player @ 75% brightness.

    https://plus.google.com/photos/110825127270933703288/albums/5707020841875297089
     
  11. EarlZ

    EarlZ Android Enthusiast
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    Hardware issue as of now as a replacement with a non defective screen can fix the issue.
     
  12. antart

    antart Newbie
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    I'm now watching the "test video" in the stock player on two Galaxy Nexuses. One is from the UK and has a Modaco ROM, the other one is brand new from Australia. The first one has the problem and the second one doesn't, even if I make it brighter than the first one.
     
  13. jkc120

    jkc120 Android Expert
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    Can you post a side by side picture of the two please? Also, since this is a ROM, it sounds like it is not fixable without a hardware replacement or if Samsung can swap the ROM to the newer/fixed one.

    If you can post some pictures of the two side by side playing back various videos, I would love to see how much it is improved. Especially the Iron Man 2 trailer video here:

    IM2_Sample3.mkv

    And of course the video in the beginning of this thread (@ 7-8 seconds in):

    http://dl.dropbox.com/u/28717002/test.m4v

    And the Dr. Who clip (first 1-2 seconds):

    http://dl.dropbox.com/u/28717002/drwho.mkv
     
  14. hlsilver

    hlsilver Well-Known Member
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    Well that's not the answer I was hoping for but I guess it makes sense as the first GNex I had didn't have the issue...guess it's off to Verizon later to see if they can get me another refurb that doesn't have this issue.
     
  15. biffsmash

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    Have to say this is down to bad videos. I tried promethious trailer on youtube and the blacks arent perfect although none of the effects this thread is suggesting.

    Expendables HD looks perfect and the blacks are almost black with none of the problems suggested in this thread.

    Dark knight rises trailer is a little greyer on the blacks but no artifacts.

    What I have noticed is all the videos with issues are the apple trailers, so i'm blaming apple, as all the none apple trailers I watch have perfect black backgrounds!

    This is UK GNex on 4.0.2 stock on orange. Normal lighting, 50% brightness.
     
  16. dhworph

    dhworph Android Enthusiast
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    Yes, this is "purely" a video quality issue in some respect, because uncompressed or sufficiently high quality videos will not display the artifacts. But it also is a hardware/software issue too, b/c this type of screen is known to show these artifacts, but maybe a software fix exists... I'm not really sure. It's not only a video quality issue, because the artifacts cannot be seen on different screen types and it purportedly varies from GNex to GNex in severity.

    I just watched the iron man 2 sample... didn't watch that one before... and notice a poor banded gradient in the horizon behind iron man, and some artifacts in the smoke early on in the scene. Also, this was on full brightness in a 100% dark closet with MX player (screen set to 100% brightness both in MX and in settings, turning brightness down in MX and the artifacts disappear for the most part). The video in general is very bright, I notice details that are not visible at all when watching it on my laptop --- however, even on my laptop, I can see some banding in the horizon, but it is much fainter. So makes me think there is something going on with contrast/gamma too... If everything that was black on my laptop was black on the GNex, I wouldn't have noticed anything at all. And turning brightness on MX down mostly makes the artifacts disappear, but the video is then a bit too dark.

    I am starting to think that this can be fixed with software for the most part...

    ***New finding: On my laptop, I can make the artifacts appear if I open it in VLC and turn the contrast down just a bit!. See screenshot from VLC on laptop with contrast & brightness ticked down, and gamma & saturation ticked up, just a hair each.
     

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  17. dhworph

    dhworph Android Enthusiast
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    What would be really nice is to have screen calibration options in the stock settings menu. And/or video player that can save profiles for screen settings --- such as contrast, brightness, saturation, and gamma.
     
  18. antart

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  19. antart

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    The bottom image looks brighter on the photo, but IRL I've tried to set the overall brightness the same on both phones. Which means 100% on the brand new AU phone and 28% on the Modaco UK phone. Modaco brightness is significantly more agressive, which is the way I want it.
     
  20. antart

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    With Screen Adjuster I can make this video on my UK phone look exactly the same as on the AU one. I wish DICE player had this capability, but I only watch videos on the tablet anyway.

    However, if I reduce the contrast on the UK GNex, its black (e.g. notification bar) becomes grayish, whereas the AU phone has true black.
     
  21. antart

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    It does look like a hardware (screen technology) issue which is masked by tweaking the software (contrast and brightness). But the UK phone seems to be able to decrease the contrast of videos without decreasing the contrast of other things.
     
  22. jkc120

    jkc120 Android Expert
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    So you've done no tweaking to either and that's stock playback?

    This pisses me off. It really does. Verizon and Samsung are claiming there is nothing wrong. This clearly shows there is a hardware flaw which they fixed and are just trying to pawn off the shitty screen to people who they hope won't know any better.

    With your permission, I will submit this image and thread link to the google bug report I filed. Seems more like this should be Samsung's problem and we need to all call them and bitch about this vocally and frequently.

    :mad::mad::mad::mad::mad:
     
  23. antart

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  24. dhworph

    dhworph Android Enthusiast
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    Seriously, play the test videos in VLC on your computer with these settings as shown in the attached photo. I can reproduce nearly every artifact I've now seen on all the videos...
     

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  25. AnotherFatalEpic

    AnotherFatalEpic Android Enthusiast
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    I know it's late but I kept seeing these threads and thought I'd give it a shot. Not sure if I'm doing something wrong but I chrome-to-phone'd the link and it opened in my stock video player right away.

    In the black parts in the beginning, I'm not sure if there is supposed to be detail there but the black on the left looks completely black including his hair. I saw some strange texture for a minute but I think it's because my phone was streaming the video.

    I didn't see anything blue, or posterized. I'm not in a completely dark room but it is dim and my screen was at 100% brightness.

    I've also watched videos on Netflix and the quality is always great.

    Let me know if I did it wrong and I will re-test my device if so.
     
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