Judder on just one .mkv?

WD Legacy Products WD TV Live Hub Discussions
1

Hi all,

Recently ripped my entire VDV & Blu collection to .mkv.  They are stored on a WD MyBook NAS, connected to my Live Hub through a TPLink desktop Gigabit switch.

Everything is fine except for one movie - The Dark Knight - which is a blu-ray rip and had really juddery playback.  The rip itself is fine - streams to my laptop from the NAS fine - but its juddery through the Live Hub.  All other Blu rips are fine.

Anyone got any ideas?

Thanks

2

Crystal Ball says … " Post a Mediainfo output log file and people can help"         http://mediainfo.sourceforge.net/en

 

656×833 62.9 KB

 

P.S. Yes, the RIP may be “Fine” and perfectly playable on PC …but is it within the WDTV Live Hub Specs ?

 

  • MPEG2 MP@HL up to 1920x1080p24, 1920x1080i30 or 1280x720p60 resolution.
  • MPEG4.2 ASP@L5 up to 1280x720p30 resolution and no support for global motion compensation.
  • WMV9/VC-1 MP@HL up to 1280x720p60 or 1920x1080p24 resolution. VC-1 AP@L3 up to 1920x1080i30, 1920x1080p24 or 1280x720p60 resolution.
  • H.264 BP@L3 up to 720x480p30 or 720x576p25 resolution.
  • H.264 MP@L4.1 and HP@4.1 up to 1920x1080p24, 1920x1080i30, or 1280x720p60 resolution.
1 Like
3

Thanks for the tip!

Can’t find a way to attach a file (!) but details are:

General Unique ID                                : 181622256251135700882164521208088276942 (0x88A32C9797C5638A60A17F119926AFCE)

Complete name                            : G:\Movies\Comic Book Movies\The Dark Knight.mkv

Format                                   : Matroska

Format version                           : Version 2

File size                                : 26.9 GiB

Duration                                 : 2h 32mn

Overall bit rate                         : 25.3 Mbps

Movie name                               : The Dark Knight

Encoded date                             : UTC 2013-02-22 15:32:33

Writing application                      : MakeMKV v1.7.8 win(x64-release)

Writing library                          : libmakemkv v1.7.8 (1.2.0/1.1.0) win(x64-release)

Video

ID                                       : 1

Format                                   : VC-1

Format profile                           : Advanced@L3

Codec ID                                 : V_MS/VFW/FOURCC / WVC1

Codec ID/Hint                            : Microsoft

Duration                                 : 2h 32mn

Bit rate                                 : 23.5 Mbps

Width                                    : 1 920 pixels

Height                                   : 1 080 pixels

Display aspect ratio                     : 16:9

Frame rate mode                          : Constant

Frame rate                               : 23.976 fps

Chroma subsampling                       : 4:2:0

Bit depth                                : 8 bits

Scan type                                : Progressive

Compression mode                         : Lossy

Bits/(Pixel*Frame)                       : 0.473

Stream size                              : 25.0 GiB (93%)

Language                                 : English

Default                                  : No

Forced                                   : No

4

I note that from a random sample of the other Blu-Ray rips that work, their Video Format is AVC, this one that is struggling is VC-1.  Dunno why they’d be different (my encoding knowledge goes as far as sticking the disc in and hitting ‘go’) but maybe I’ll try ripping it again?

Great tip on that MediaInfo tool - thanks!

5

No idea either tbh.

I don’t see the point in creating a Mkv at the size you are doing, just rip out the main .m2ts with tsmuxer removing any audio and subs you do not want and it alleviates any apps messing with codecs and the likes.

6

So having isolated VC-1 as a possible root cause, I found an answer in a post on these boards - My Hub was auto-detetcting through HDMI to 720p.  If I force it to 1080i, the issue goes away.  I’m not going to pretend to understand, but it works for me :slight_smile:

Your point about ripping out the .m2ts with tsmuxer - I’ll give that a go if it will reduce some of these files down a bit!

Thanks.

7

Ah good Strange but good.

Mmmm it wont reduce the files, it will leave them untouched so you get the full Bluray quality.

You will have to change your encoding settings to get them smaller, TsMuxer leaves things untouched.

8

Aha - gotcha

I’m using Makemkv - I’'d understood that didn’t mess with the encoding but just stuck it into a Matroska wrapper?  Is TSMuxer a better route then?

9

It depends what you want I suppose.

If you want the Video/Audio/Subs to stay as it was on the Bluray quality wise then its great, nice and quick as well.

If you want to shrink a 1080p movie down to 10Gb then encoding is the way to go.

I personally check the reviews on Bluray.com, if the Video gets top marks then I just remux it with Tsmuxer, if its not so great, then I dont want a 25-40Gb rip of it, when a Mkv will look just the same.

Some will say there is no real difference, each to their own. :slight_smile: