VideoHelp Forum

Our website is made possible by displaying online advertisements to our visitors. Consider supporting us by disable your adblocker or Try ConvertXtoDVD and convert all your movies to DVD. Free trial ! :)
+ Reply to Thread
Results 1 to 16 of 16
Thread
  1. Hey, I have here a Blu-ray.
    On this Blu-ray are downscale fails (the contours be pixelated on downscaled content (a mistake from the animation studio): http://vgy.me/MOncWN.png).

    Does anyone of you now, how I can eliminate this error in Avisynth?
    Quote Quote  
  2. What's failing? Are you talking about those jagged lines in the black letters or whatever they are? And you're saying it's in the source and even the Blu-Ray has it?

    Better would be for you to provide your script and an untouched 10 second sample of the video where this happens.
    Quote Quote  
  3. Originally Posted by manono View Post
    What's failing? Are you talking about those jagged lines in the black letters or whatever they are? And you're saying it's in the source and even the Blu-Ray has it?

    Better would be for you to provide your script and an untouched 10 second sample of the video where this happens.
    I mean this: http://vgy.me/SxKlp3.png http://vgy.me/fiWaoL.png http://www94.zippyshare.com/v/KE7XzhaU/file.html

    I only load the m2ts file (LWLibavVideoSource), no other filter.
    Quote Quote  
  4. Use an antialiasing filter. There are dozens to choose from. Play with the settings until you find something you like

    Try AAA
    Quote Quote  
  5. Originally Posted by poisondeathray View Post
    Use an antialiasing filter. There are dozens to choose from. Play with the settings until you find something you like

    Try AAA
    No, that's no aliasing. I want a better solution. I want a "smart" solution. A antialiasing filter destroy details.
    Quote Quote  
  6. Originally Posted by Ninelpienel View Post
    Originally Posted by poisondeathray View Post
    Use an antialiasing filter. There are dozens to choose from. Play with the settings until you find something you like

    Try AAA
    No, that's no aliasing. I want a better solution. I want a "smart" solution. A antialiasing filter destroy details.
    Fact: Anything you do that will "fix" this artifact will destroy detail. A smart mask will destroy detail even if you paint it frame by frame

    Like everything in avisynth, it's about pros/cons. Nothing will fix this without destroying at least some detail. There is no filter that is perfect. This is temporal aliasing (watch it frame by frame, the pattern changes over time)

    Or what did you have in mind exactly ? Maybe your expectations are a bit high ?
    Last edited by poisondeathray; 25th Aug 2015 at 15:57.
    Quote Quote  
  7. Member
    Join Date
    May 2014
    Location
    Memphis TN, US
    Search PM
    Originally Posted by Ninelpienel View Post
    Hey, I have here a Blu-ray.
    That's not a BluRay. MKV and 29.97fps at 1080p aren't valid for BluRay. It's just a 1080p HD MKV. Period. It's been changed from the original, if the original was really "BluRay". How did it get to be 29.97fps progressive in an MKV container? Where it did it come from? What resolution are you downscaling to?

    I agree, the rough pixel edges shown in your images is aliasing. Whether it was in the original or not is anyone's guess.
    - My sister Ann's brother
    Quote Quote  
  8. Originally Posted by LMotlow View Post
    Originally Posted by Ninelpienel View Post
    Hey, I have here a Blu-ray.
    That's not a BluRay. MKV and 29.97fps at 1080p aren't valid for BluRay. It's just a 1080p HD MKV. Period. It's been changed from the original, if the original was really "BluRay". How did it get to be 29.97fps progressive in an MKV container? Where it did it come from? What resolution are you downscaling to?

    I agree, the rough pixel edges shown in your images is aliasing. Whether it was in the original or not is anyone's guess.
    What? I muxed the Blu-ray (and splitt the part it with MkvMergGUI) and it's 23,976 FPS: http://vgy.me/mqCc74.png
    Quote Quote  
  9. Member
    Join Date
    May 2014
    Location
    Memphis TN, US
    Search PM
    What does "muxed it" mean? Are you referring to your sample? If you muxed it, what happened to the audio? The MKV has 25-frame GOP's, which is not used for official 29.97 BluRay. BluRay uses 1-second and 2-second GOP's. 25-frame GOP's are for 25 1080i PAL BluRay. What you submitted is closer to to AVCHD.

    Here are the official BluRay specs: https://www.videohelp.com/hd#tech.

    Here are the specs on the sample you submitted:
    Code:
    General
    Unique ID                                : 197010173666297412467321356186497337617 (0x9436C77EFA724174BB13BF10FC784911)
    Complete name                            : E:\forum\pixelate\00014.mkv
    Format                                   : Matroska
    Format version                           : Version 4 / Version 2
    File size                                : 21.7 MiB
    Duration                                 : 6s 90ms
    Overall bit rate mode                    : Variable
    Overall bit rate                         : 29.9 Mbps
    Encoded date                             : UTC 2015-08-25 20:13:19
    Writing application                      : mkvmerge v8.3.0 ('Over the Horizon') 64bit
    Writing library                          : libebml v1.3.1 + libmatroska v1.4.2
    DURATION                                 : 00:00:06.090000000
    NUMBER_OF_FRAMES                         : 146
    NUMBER_OF_BYTES                          : 22780238
    _STATISTICS_WRITING_APP                  : mkvmerge v8.3.0 ('Over the Horizon') 64bit
    _STATISTICS_WRITING_DATE_UTC             : 2015-08-25 20:13:19
    _STATISTICS_TAGS                         : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
    Video
    ID                                       : 1
    Format                                   : AVC
    Format/Info                              : Advanced Video Codec
    Format profile                           : High@L4.1
    Format settings, CABAC                   : Yes
    Format settings, ReFrames                : 4 frames
    Codec ID                                 : V_MPEG4/ISO/AVC
    Duration                                 : 6s 89ms
    Bit rate mode                            : Variable
    Bit rate                                 : 29.3 Mbps
    Maximum bit rate                         : 39.0 Mbps
    Width                                    : 1 920 pixels
    Height                                   : 1 080 pixels
    Display aspect ratio                     : 16:9
    Frame rate mode                          : Constant
    Frame rate                               : 23.976 fps
    Color space                              : YUV
    Chroma subsampling                       : 4:2:0
    Bit depth                                : 8 bits
    Scan type                                : Progressive
    Bits/(Pixel*Frame)                       : 0.590
    Stream size                              : 21.3 MiB (98%)
    Default                                  : Yes
    Forced                                   : No
    All that aside, how are downscaling? I'll echo the request for the script you're using.
    Last edited by LMotlow; 26th Aug 2015 at 11:06.
    - My sister Ann's brother
    Quote Quote  
  10. Originally Posted by LMotlow View Post
    What does "muxed it" mean? Are you referring to your sample? If you muxed it, what happened to the audio? The MKV has 25-frame GOP's, which is not used for official 29.976 BluRay.

    Here are the official BluRay specs: https://www.videohelp.com/hd#tech.

    Here are the specs on the sample you submitted:
    Code:
    General
    Unique ID                                : 197010173666297412467321356186497337617 (0x9436C77EFA724174BB13BF10FC784911)
    Complete name                            : E:\forum\pixelate\00014.mkv
    Format                                   : Matroska
    Format version                           : Version 4 / Version 2
    File size                                : 21.7 MiB
    Duration                                 : 6s 90ms
    Overall bit rate mode                    : Variable
    Overall bit rate                         : 29.9 Mbps
    Encoded date                             : UTC 2015-08-25 20:13:19
    Writing application                      : mkvmerge v8.3.0 ('Over the Horizon') 64bit
    Writing library                          : libebml v1.3.1 + libmatroska v1.4.2
    DURATION                                 : 00:00:06.090000000
    NUMBER_OF_FRAMES                         : 146
    NUMBER_OF_BYTES                          : 22780238
    _STATISTICS_WRITING_APP                  : mkvmerge v8.3.0 ('Over the Horizon') 64bit
    _STATISTICS_WRITING_DATE_UTC             : 2015-08-25 20:13:19
    _STATISTICS_TAGS                         : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
    Video
    ID                                       : 1
    Format                                   : AVC
    Format/Info                              : Advanced Video Codec
    Format profile                           : High@L4.1
    Format settings, CABAC                   : Yes
    Format settings, ReFrames                : 4 frames
    Codec ID                                 : V_MPEG4/ISO/AVC
    Duration                                 : 6s 89ms
    Bit rate mode                            : Variable
    Bit rate                                 : 29.3 Mbps
    Maximum bit rate                         : 39.0 Mbps
    Width                                    : 1 920 pixels
    Height                                   : 1 080 pixels
    Display aspect ratio                     : 16:9
    Frame rate mode                          : Constant
    Frame rate                               : 23.976 fps
    Color space                              : YUV
    Chroma subsampling                       : 4:2:0
    Bit depth                                : 8 bits
    Scan type                                : Progressive
    Bits/(Pixel*Frame)                       : 0.590
    Stream size                              : 21.3 MiB (98%)
    Default                                  : Yes
    Forced                                   : No
    I have put the m2ts in MkvmergeGUI, disabled the audio track, set the Split mode on Global to "split by parts based on timecodes", enter 00:00:00-00:00:06 (i wanted only the first 6 seconds from the video) and clicked on "Start muxing". In your code stands "Frame rate: 23.976 fps" btw.

    This is my Avisynth script:

    LWLibavVideoSource("X:\X\BDMV\STREAM\00014.m2ts")
    Last edited by Ninelpienel; 25th Aug 2015 at 16:27.
    Quote Quote  
  11. Member
    Join Date
    May 2014
    Location
    Memphis TN, US
    Search PM
    Originally Posted by Ninelpienel View Post
    In your code stands "Frame rate: 23.976 fps" btw.
    Yes, I made a typo in my post, which I just correceted to 29.97. But the long text code is a copy MediaInfo's data, not something I made up. MediaInfo says 29.976, as shown. Two HD editors that I use report the MKV's frame rate as 97.976. That's easy enough to correct in processing, but.......

    Originally Posted by Ninelpienel View Post
    This is my Avisynth script:

    LWLibavVideoSource("X:\X\BDMV\STREAM\00014.m2ts")
    That's your entire Avisynth script? All it does is open the original video and decode it. It doesn't do anything else.

    You haven't told us enough. What are you using to downsample? What are you downsampling to? What final format do you want for output? "Downsample" usually means to resize to a different resolution or sampling rate than the original. Is that what you're trying to do? Poisondeathray's post is correct. Downsampling and anti-aliasing always involve a detail cost to some extent. There is no way around it. The final results depend on the problem and how it's handled.
    - My sister Ann's brother
    Quote Quote  
  12. Originally Posted by LMotlow View Post
    Originally Posted by Ninelpienel View Post
    In your code stands "Frame rate: 23.976 fps" btw.
    Yes, I made a typo in my post, which I just correceted to 29.97. But the long text code is a copy MediaInfo's data, not something I made up. MediaInfo says 29.976, as shown. Two HD editors that I use report the MKV's frame rate as 97.976. That's easy enough to correct in processing, but.......

    Originally Posted by Ninelpienel View Post
    This is my Avisynth script:

    LWLibavVideoSource("X:\X\BDMV\STREAM\00014.m2ts")
    That's your entire Avisynth script? All it does is open the original video. It doesn't do anything else.

    You haven't told us enough. What are you using to downsample? What are you downsampling to? What final format do you want for output? "Downsample" usually means to resize to a different resolution or sampling rate than the original. Is that what you're trying to do? Poisondeathray's post is correct. Downsampling and anti-aliasing always involve a detail cost to some extent. There is no way around it. The final results depend on the problem and how it's handled.
    I think it doesn't matter, what I do as next. There are these fails in the video and i want to fix this.
    This are my next steps:

    dither_convert_8_to_16()
    ly = DebilinearM(1280, 720, lsb_inout=true, cubic=false)
    lc = dither_resize16(1280*2, 720*2, src_left=0.25, kernel="blackman")
    lu = lc.utoy()
    lv = lc.vtoy()
    ytouv(lu,lv,ly)
    DitherPost()
    GradFun3mod(thr=0.6,elast=4,radius=8,ampo=1,mode=6 ,ampn=1.8)
    Quote Quote  
  13. Member
    Join Date
    May 2014
    Location
    Memphis TN, US
    Search PM
    Thanks for that, but why are doing it? Do you really want 1280x720 or 1280*2x720*2? That's not BluRay, either, so I guess you want HDD-only playback and generic MKV. That script won't fix rough edges or line twitter.

    There are hundreds of possible Avisynth errors. What error are you getting?
    - My sister Ann's brother
    Quote Quote  
  14. Reading:
    This filter is designed to reverse the effects of bilinear upsampling. Parameters and sampling pattern try to mimic AviSynth's BilinearResize. Debilinear is only effective on "ideal" or close to ideal conditions. The conditions are that the material has to be a pure bilinear upscale, and you have to know exactly what was the original resolution and the possible sub-pixel shifts. Any other material overlayed on top of the upscale (like native 1080i/1080p credits) will cause ringing or visual defects. Same with compression artefacts, which will be amplified to death, so debilinear is clearly not suited for TV streams or any other low quality sources.
    source: http://avisynth.nl/index.php/Debilinear
    it doesn't sound like a good idea to use DebilinearM

    I'm not really familiar with the whole dither tool set, but downscaling to 1280x720, then the source to 2560x1440 and then merging the color planes, seems like a messed up version of what folks do when they use their 8bit 4k 4:2:0 (or was it 4:2:2) captures to get 1080p 10bit 4:4:4 content.
    -> I doubt that the whole:
    Code:
    dither_convert_8_to_16()
    ly = DebilinearM(1280, 720, lsb_inout=true, cubic=false)
    lc = dither_resize16(1280*2, 720*2, src_left=0.25, kernel="blackman")
    lu = lc.utoy()
    lv = lc.vtoy()
    ytouv(lu,lv,ly)
    part will really help and not distorting stuff.

    ---
    Personally I too would use something like EdgeSmoothFast and Hysteria,...
    users currently on my ignore list: deadrats, Stears555
    Quote Quote  
  15. Member
    Join Date
    May 2014
    Location
    Memphis TN, US
    Search PM
    @Selur, thanks for more details on DebilinearM. No wonder I didn't like it. Wrong source material.
    - My sister Ann's brother
    Quote Quote  
  16. Originally Posted by Selur View Post
    Reading:
    This filter is designed to reverse the effects of bilinear upsampling. Parameters and sampling pattern try to mimic AviSynth's BilinearResize. Debilinear is only effective on "ideal" or close to ideal conditions. The conditions are that the material has to be a pure bilinear upscale, and you have to know exactly what was the original resolution and the possible sub-pixel shifts. Any other material overlayed on top of the upscale (like native 1080i/1080p credits) will cause ringing or visual defects. Same with compression artefacts, which will be amplified to death, so debilinear is clearly not suited for TV streams or any other low quality sources.
    source: http://avisynth.nl/index.php/Debilinear
    it doesn't sound like a good idea to use DebilinearM

    I'm not really familiar with the whole dither tool set, but downscaling to 1280x720, then the source to 2560x1440 and then merging the color planes, seems like a messed up version of what folks do when they use their 8bit 4k 4:2:0 (or was it 4:2:2) captures to get 1080p 10bit 4:4:4 content.
    -> I doubt that the whole:
    Code:
    dither_convert_8_to_16()
    ly = DebilinearM(1280, 720, lsb_inout=true, cubic=false)
    lc = dither_resize16(1280*2, 720*2, src_left=0.25, kernel="blackman")
    lu = lc.utoy()
    lv = lc.vtoy()
    ytouv(lu,lv,ly)
    part will really help and not distorting stuff.

    ---
    Personally I too would use something like EdgeSmoothFast and Hysteria,...
    It looks a little bit better, when I use DebilinearM with chroma upscaling. The anime was produced in 720p. When I use Debilinear(1280, 720) for downscale and BilinearResize(1920, 1080) for upscale, it looks identical to the untouched Blu-ray. Thanks for the filter offers.
    Quote Quote  



Similar Threads